US2980032A - Fuel pump - Google Patents
Fuel pump Download PDFInfo
- Publication number
- US2980032A US2980032A US79612259A US2980032A US 2980032 A US2980032 A US 2980032A US 79612259 A US79612259 A US 79612259A US 2980032 A US2980032 A US 2980032A
- Authority
- US
- United States
- Prior art keywords
- diaphragm
- fuel
- flap
- pump
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/14—Check valves with flexible valve members
- F16K15/1402—Check valves with flexible valve members having an integral flexible member cooperating with a plurality of seating surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/14—Check valves with flexible valve members
- F16K15/16—Check valves with flexible valve members with tongue-shaped laminae
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
- F02M2700/43—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel
- F02M2700/4302—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit
- F02M2700/438—Supply of liquid to a carburettor reservoir with limitation of the liquid level; Aerating devices; Mounting of fuel filters
- F02M2700/4388—Supply of liquid to a carburettor reservoir with limitation of the liquid level; Aerating devices; Mounting of fuel filters with fuel displacement by a pump
- F02M2700/439—Supply of liquid to a carburettor reservoir with limitation of the liquid level; Aerating devices; Mounting of fuel filters with fuel displacement by a pump the pump being a membrane pump
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S261/00—Gas and liquid contact apparatus
- Y10S261/68—Diaphragm-controlled inlet valve
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7838—Plural
- Y10T137/7843—Integral resilient member forms plural valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7879—Resilient material valve
- Y10T137/7888—With valve member flexing about securement
- Y10T137/7891—Flap or reed
Definitions
- flap type check valves integral with the diaphragm and operatively associated with the fuel inlet and outlet passages.
- Such check valve flaps are generally separate from the pumping portion of the diaphragm and are each enclosed in valve chambers formed in the body of the pump.
- the flap When the pressure in the valve chamber is greater than the pressure in the fuel passage, the flap is urged tightly against its seat around the opening thereby preventing back-flow of fuel from the chamber into the passage.
- the flap is unseated and displaced out of the plane of the diaphragm into the chamber thereby permitting the fuel in the passage to flow into the chamber.
- Flap valves of this type are usually formed of very thin sheet material which is highly flexible so that the flaps respond readily to small pressure differentials, and they are uniformly flat so that they can effect a continuous seal around the opening of the fuel passage. It has been found, however, that in diaphragms which have been in operation for long periods of time, the flaps often lose their original flatness and no longer seat readily to seal the fuel passages. Needless to say, this greatly reduces the efliciency of the pump since at each stroke a certain amount of fuel leaks under the distorted portions of the flap and correspondingly less fuel is delivered from the outlet of the pump.
- flaps are generally formed from synthetic elastomers which, if unevenely or excessively heated, are unable to resist curling during use.
- One of the primary purposes of this invention is to provide a fuel pump of the type described having flap elements integral with the pump diaphragm which remain uniformly flat even after long use. This is accomplished without departing from the use of thin flexible sheet materials from which conventional pumpdiaphragms are presently formed,'and also withoutradically altering the design of ordinary pump body members.
- the invention provides a unitary flexible substantially flat sheet diaphragm for use in a diaphragm-type pump comprising a displaceable pumping portion adapted to partly define a pumping chamber, and at least one check valve portion adapted to control flow of fluid through the pump.
- the check valve portion comprises a flat valve flap having a base joined integrally with the diaphragm and a free end essentially separated by cut-out sections from the main body of the diaphragm.
- the free end of the valve flap is displaceable out of the plane of a cut-out section of the diaphragm; but at least one flexible web finger bridges the cutout section and joins the free end of the valve flap to the diaphragm.
- Fig. l is an elevation partly in section of a pump according to the invention
- Fig. 2 is a section taken along the line 2-2 of Fig. l;
- Fig. 3 is a plan view of a modified form of a pump diaphragm according to the invention.
- the pump includes a pair of body members 10 and 11 which are fastened together in substantially face-to-face relationship by means of a plurality of screws 13 disposed about their corresponding peripheries.
- the upper portion of the body member 11 is broken away to indicate that the pump may be incorporated in a larger assembly such as a carburetor.
- the pump is of the type actuated by a source of fluctuating fluid pressure, though it can also be mechanically actuated by a cam shaft or similar means.
- the diaphragm 14 Separating the facing surfaces of the body members 10 and 11 is a flat uniformly thin flexible diaphragm 14 of circular shape.
- the diaphragm 14 includes a central pumping portion 15, separate inlet and outlet check valve portions 17 and 18 respectively, and a peripheral gasket portion indicated generally at 19 which makes up the remainder of its area.
- the gasket portion 19 of the diaphragm is that area which in the assembled pump underlies a gasket 21 positioned against the upper body member 11. Itwill be noted that the screws 13 extend through corresponding holes in both the gasket portion 19 of the diaphragm and the gasket 21.
- gasket portion 19 of the diaphragm in conjunction with the gasket 21, provides a fluid tight seal which isolates each of the inlet and outlet check valve portions 17 and 18 and the pumping portion 15 from one another when the pump is assembled.
- An actuating cavity 23 is formed in the upper body member 11. This cavity together with the upper side of the pumping portion 15 of the diaphragm defines an actuating chamber 24.
- the actuating chamber 24 communicates with a source of fluctuating fluid pressure (such I as the crank-case of a two-cycle engine) through an air passage 25.
- a pumping cavity 27 is formed in the other pump body member 10. This latter cavity, together with the lower side of the pumping portion 15 of the diaphragm, defines a pumping chamber 28.
- the check valve portion 17 includes a valve flap 29 integrally joined at its base to the adjacent gasket portion 19 of the; diaphragm. Its free end isseparat'egl '31 which bridge the cut-out sections 30.
- the valvefiaps 29'and theweb fingers 31 are of the same uniform thickness as the surrounding portions of the diaphragm, so they can be formed by stamping or punching out the cut-out sections 30.
- the outlet check valve portion 18 includes a valve flap 32 integrally joined at its base to the diaphragm, with its free end separated from the surrounding portion of the diaphragm by cut-out sections 33.
- a pair of integral webs 34 connect the free end of the valve flap 32 to the main body of the diaphragm across the cut-out sections 33.
- the element of the fuel system of this novel pump can best be described in-the order in which they are encountered by fuel passing through the pump.
- Fuel is drawn into the pump through an inlet nozzle 36 into a suitable filter 37 which is held in place by a screw 38.
- the fuel then passes into an inlet passage 39 formed in the body member 10, proceeds through the inlet check valve portion 17 of the diaphragm 19 (as is described in detail below), and enters an inlet valve chamber 40 defined substantially by the body member 11. It is then directed from the valve chamber 40 through the cut-out section 30 of the diaphragm 14 into intersecting bores 41 and 42 in the body member and then into the pump ing chamber 28.
- the fuel exits under pressure into the intersecting bores 43 and 44 and through the outlet check valve portion 18 of the diaphragm (as is also described in detail below). It then enters an outlet valve chamber 45 from which it proceeds under pressure to the outlet fuel passage 46.
- the operation of this novel pump is as follows:
- the cyclically fluctuating air pressure in the actuating chamber 24 causes the pumping portion of the diaphragm 14 to flex alternately in and out of the pumping chamber 28.
- the internal pressure in the pumping chamber 28 is decreased. This reduction in pressure is transmitted to the inlet valve chamber 40 and when the pressure therein drops below the pressure in the inlet fuel passage 39, the flap element 29 is lifted and fuel is sucked through into the pumping chamber.
- the webs 31 permit the flap 29 to be raised a sufiicient distance off its seat to allow the fuel to pass easily from the fuel inlet passages 39 into the pumping chamber 40.
- the pumping portion 15 of the diaphragm moves downwardly into the pumping chamber 28 thereby increasing the pressure of the fuel therein.
- the eifect of this at the inlet check valve portion 17 is to force the flap element 25 against its seat to seal off the inlet passage. This prevents back-flow of fuel from the pumping chamber 28 into the inlet passage 39 during the pumping stroke of the diaphragm.
- At the outlet check valve portion 18 there is a simultaneous increase in pressure in the bore 44 which causes it to exceed the pressure within the outlet valve'chamber 45. This causes thefiap element-32 to be lifted from-its seat (as shown in Fig.
- the flap elements 29-and-32' respectively are not excessively displaced. Asa result they do not become so stressed as to warp even after prolonged use. Also, if thermal stresses due to overheating tend to cause curling of the diaphragm material, the webs minimize the deformation of the valve fiaps and insure that they sufiiciently retain their original flat shape to continue to seat eifectively.
- the webs 31 and 34 likewise compensate for uneven stress which might be imparted to the flap elements 29 and 32 by excessive tightening together of the body members 10 and 11 during assembly of the pump.
- the diaphragm 50 includes a central pumping portion 52, inlet and outlet check valve portions 53 and 54 respectively, and a peripheral gasket portion 55 which makes up the remainder of the diaphragms area. Since the diaphragm 50 is to be assembled with a pair of pump body members in the manner described previously, a plurality of apertures 57 are located in its gasket portion 55 to accommodate the screws for holding the pump body members together.
- the inlet check valve portion 53 includes a cut-out section 59 into which extends a fiat valve flap 60, which is joined integrally at its base to the main body of the diaphragm. Bridging the cut-out section 59 and integrally joining the outermost end of the valve flap 60 to the main body of the diaphragm is a single web finger 61. This finger limits the displacement of the flap 60 out of the plane of the diaphragm sheet and aids in preventing it from being distorted out of its original flat shape.
- the cut-out section 59 shown in Fig. 3 extends to one side of the flap element 60. Hence, this check valve portion is adapted for use in a valve chamber wherein the inlet passage is not in radial alignment with the bores leading from the valve chamber to the pumping chamber.
- the outlet check valve portion 54 is of still different construction. It includes a circular valve flap 63 disposed in a concentric cut-out section 64.
- the ,valve flap 63 is integrally joined to the main body of the diaphragm by' a plurality of web fingers 66 which bridge the cutout section 64. Any one of these web fingers can be regarded as defining the base of the circular valve flap, and the others as joined to the free end of the valve flap.
- This type of valve flap is particularly adapted for use in the outlet valve chamber of a pump wherein the fuel enters through the cut-out section and exits from the chamber without passing back through the diaphragm. An example of such arrangement is shown in Figs.
- a unitary flexible substantially flat sheet diaphragm comprising a displaceable pumping portion adapted to partly define a pumping chamber, at least one check valve portion adapted to control flow of fluid through. said pump, said check'valve portion comprising a fiat valve flap having a base integral with said diaphragm and an end portion essentially separatedby cut-outsections from the main body of said diaphragm, the end portion of said valve flap being dis.
- a diaphragm-type fuel pump comprising two body members joined together in substantially face-to-face relationship, a flexible diaphragm separating the substantially cojoined faces of said body members, said diaphragm including a pumping portion which partly defines a pumping chamber in one of said body members, both of said body members having fuel inlet and outlet passages formed therein communicating with said pumping chamber, said diaphragm also including check valve portions located in said fuel passages for controlling flow of fluid through said pump, at least one of said check valve portions comprising a flat valve flap having a base integral with said diaphragm and an end portionressentially separated by cut-out sections from the main body of said diaphragm, the end portion of said valve flap normally being in sealing relation with the fuel passage with which it is associated and being displaceable out of the plane of said diaphragm to permit flow of fuel through its associated fuel passage, and at least one flexible web finger bridging said cut-out sections and joining the end portion of said valve" flap to said diaphrag
- a diaphragm of substantially flat flexible material comprising a displaceable pumping portion adapted to partly define a pumping chamber, and two separate check valve portions adapted to maintain unidirectional flow of fuel through said pump, each of said check valve portions comprising a valve flap having a base joined integrally to said diaphragm and an end portion essentially separated by cut-out sections from the main body of the diaphragm, the end portion of said valve flap being displaceable out of the plane of said diaphragm, and restraining means comprising at least one web finger integrally joined both to the end portion of said valve flap and to the main body of the diaphragm bridging said cut-out sections and limiting without preventing displacement of said end portion of the valve flap out of the plane of the diaphragm.
- a diaphragm according to claim 3 wherein the restraining means in at least one of said check valve portions comprises two integral separate web fingers bridging the cut-out sections from opposite sides of the end portion of the valve flap to the main body of the diaphragm.
- restraining means in at least one of said check valve portions comprises a single integral web finger bridging the cut-out sections from the outermost end of the valve flap to the main body of the diaphragm.
- a diaphragm-type fuel pump comprising two body members joined together in substantially face-to-face relationship, a substantially fiat flexible diaphragm separating the substantially cojoined faces of said'body members, said diaphragm including a pumping portion which partly defines an actuating chamber in one of said body members and a pumping chamber in the other of said body members, said actuating chamber being adapted to communicate with a source of fluctuating fluid pressure, both of said body members having fuel inlet and outlet passages formed therein communicating with said pumping chamber, said diaphragm also including two separate check valve portions located in the respective fuel passages for maintaining unidirectional flow of fuel through said pump, each of said check valve portions comprising a flat valve flap having a base integral with said diaphragm and an end portion essentially separated by cutout sections from the main body of said diaphragm, the end portion of said valve flap normally being in sealing relation with the fuel passage with which it is associated and being displaceable out of the plane of said diaphragm to permit
Description
April 1961 K. c. SCHNEIDER 2,980,032
FUEL PUMP Filed Feb. 27. 1959 FIG. I
INVENTOR KENNETH C. SCHNEIDER ATTORNEYS United States Patent FUEL PUMP Kenneth C. Schneider, Bethe], Conn., assignor to Brown Engine Products, Inc., a corporation of Connecticut Filed Feb. 27,1959, Ser. No. 796,122 6 Claims. (Cl. 103-150) only limited displacement out of the plane of the diaphragm.
In some diaphragm-type fuel pumps, unidirectional flow of fuel is maintained by flap type check valves integral with the diaphragm and operatively associated with the fuel inlet and outlet passages. Such check valve flaps are generally separate from the pumping portion of the diaphragm and are each enclosed in valve chambers formed in the body of the pump. When the pressure in the valve chamber is greater than the pressure in the fuel passage, the flap is urged tightly against its seat around the opening thereby preventing back-flow of fuel from the chamber into the passage. Conversely, when the pressure within the passage exceeds that within the chamber, the flap is unseated and displaced out of the plane of the diaphragm into the chamber thereby permitting the fuel in the passage to flow into the chamber. I
Flap valves of this type are usually formed of very thin sheet material which is highly flexible so that the flaps respond readily to small pressure differentials, and they are uniformly flat so that they can effect a continuous seal around the opening of the fuel passage. It has been found, however, that in diaphragms which have been in operation for long periods of time, the flaps often lose their original flatness and no longer seat readily to seal the fuel passages. Needless to say, this greatly reduces the efliciency of the pump since at each stroke a certain amount of fuel leaks under the distorted portions of the flap and correspondingly less fuel is delivered from the outlet of the pump.
There are many reasons why conventional flap elements lose their flat shape in this manner. The fact that they must be formed of such thin and flexible sheet material gives rise to some of the difliculty because if they are overstressed during the repeated bending of'the flap into and out of the plane of the diaphragm a permanent warped shape is imparted to the thin sheet material. It also appears that the flap elements are sometimes distorted by being unevenly stressed when the pump is assembled, due to excessive tightening together of the pump body members holding the diaphragm in place. Also, the
flaps are generally formed from synthetic elastomers which, if unevenely or excessively heated, are unable to resist curling during use.
One of the primary purposes of this invention, therefore, is to provide a fuel pump of the type described having flap elements integral with the pump diaphragm which remain uniformly flat even after long use. This is accomplished without departing from the use of thin flexible sheet materials from which conventional pumpdiaphragms are presently formed,'and also withoutradically altering the design of ordinary pump body members.
Patented Apr. 18,1961
Moreover, these advantages are achieved without adversely affecting the efliciency or fuel-delivery capacity of the pump.
' The invention provides a unitary flexible substantially flat sheet diaphragm for use in a diaphragm-type pump comprising a displaceable pumping portion adapted to partly define a pumping chamber, and at least one check valve portion adapted to control flow of fluid through the pump. The check valve portion comprises a flat valve flap having a base joined integrally with the diaphragm and a free end essentially separated by cut-out sections from the main body of the diaphragm. The free end of the valve flap is displaceable out of the plane of a cut-out section of the diaphragm; but at least one flexible web finger bridges the cutout section and joins the free end of the valve flap to the diaphragm. By this construction, displacement of the flap element out of the plane of the cut-out section is limited without being prevented, and the flap is restrained from permanently bending, curling, or otherwise becoming distorted out of its original uniformly flat shape.
, Preferred embodiments of the invention are described hereinbelow with reference to the accompanying drawing, wherein- Fig. l is an elevation partly in section of a pump according to the invention;
Fig. 2 is a section taken along the line 2-2 of Fig. l;
and
Fig. 3 is a plan view of a modified form of a pump diaphragm according to the invention.
Referring first to Figs. 1 and 2, the pump includes a pair of body members 10 and 11 which are fastened together in substantially face-to-face relationship by means of a plurality of screws 13 disposed about their corresponding peripheries. As seen in Fig. 1, the upper portion of the body member 11 is broken away to indicate that the pump may be incorporated in a larger assembly such as a carburetor. In this embodiment, the pump is of the type actuated by a source of fluctuating fluid pressure, though it can also be mechanically actuated by a cam shaft or similar means.
Separating the facing surfaces of the body members 10 and 11 is a flat uniformly thin flexible diaphragm 14 of circular shape. The diaphragm 14 includes a central pumping portion 15, separate inlet and outlet check valve portions 17 and 18 respectively, and a peripheral gasket portion indicated generally at 19 which makes up the remainder of its area. The gasket portion 19 of the diaphragm is that area which in the assembled pump underlies a gasket 21 positioned against the upper body member 11. Itwill be noted that the screws 13 extend through corresponding holes in both the gasket portion 19 of the diaphragm and the gasket 21. By this arrangement, the
An actuating cavity 23 is formed in the upper body member 11. This cavity together with the upper side of the pumping portion 15 of the diaphragm defines an actuating chamber 24. The actuating chamber 24 communicates with a source of fluctuating fluid pressure (such I as the crank-case of a two-cycle engine) through an air passage 25.
A pumping cavity 27 is formed in the other pump body member 10. This latter cavity, together with the lower side of the pumping portion 15 of the diaphragm, defines a pumping chamber 28. As seen most clearly in Fig. 2, the check valve portion 17 includes a valve flap 29 integrally joined at its base to the adjacent gasket portion 19 of the; diaphragm. Its free end isseparat'egl '31 which bridge the cut-out sections 30. The valvefiaps 29'and theweb fingers 31 are of the same uniform thickness as the surrounding portions of the diaphragm, so they can be formed by stamping or punching out the cut-out sections 30.
Similarly, the outlet check valve portion 18 includes a valve flap 32 integrally joined at its base to the diaphragm, with its free end separated from the surrounding portion of the diaphragm by cut-out sections 33. A pair of integral webs 34 connect the free end of the valve flap 32 to the main body of the diaphragm across the cut-out sections 33.
The element of the fuel system of this novel pump can best be described in-the order in which they are encountered by fuel passing through the pump. Fuel is drawn into the pump through an inlet nozzle 36 into a suitable filter 37 which is held in place by a screw 38. The fuel then passes into an inlet passage 39 formed in the body member 10, proceeds through the inlet check valve portion 17 of the diaphragm 19 (as is described in detail below), and enters an inlet valve chamber 40 defined substantially by the body member 11. It is then directed from the valve chamber 40 through the cut-out section 30 of the diaphragm 14 into intersecting bores 41 and 42 in the body member and then into the pump ing chamber 28. From the pumping chamber 28, the fuel exits under pressure into the intersecting bores 43 and 44 and through the outlet check valve portion 18 of the diaphragm (as is also described in detail below). It then enters an outlet valve chamber 45 from which it proceeds under pressure to the outlet fuel passage 46.
The operation of this novel pump is as follows: The cyclically fluctuating air pressure in the actuating chamber 24 causes the pumping portion of the diaphragm 14 to flex alternately in and out of the pumping chamber 28. At each stroke of the pumping portion 15 out of the pumping chamber 28, the internal pressure in the pumping chamber 28 is decreased. This reduction in pressure is transmitted to the inlet valve chamber 40 and when the pressure therein drops below the pressure in the inlet fuel passage 39, the flap element 29 is lifted and fuel is sucked through into the pumping chamber. The webs 31, however, restrain the free end of the flap element 29 and prevent it from being displaced very far out of the plane of the surrounding portions of the diaphragm 14. At the same time, the webs 31 permit the flap 29 to be raised a sufiicient distance off its seat to allow the fuel to pass easily from the fuel inlet passages 39 into the pumping chamber 40.
As this takes place at the inlet check valve portion 17, the reduction in pressure in the pumping chamber 28 is also transmitted to the bore 44 adjacent the outlet check valve portion 18 of the diaphragm. This causes the pressure in the outlet valve chamber 45 to exceed that in the bore 44 and, as a result, the flap element 32 is forced tightly against its seat to seal off the opening. This prevents back-flow of fuel from the outlet passage 46 into the pumping chamber 28 at each intake stroke of the pumping portion 15 of the diaphragm.
Upon the completion of the intake stroke, the pumping portion 15 of the diaphragm moves downwardly into the pumping chamber 28 thereby increasing the pressure of the fuel therein. The eifect of this at the inlet check valve portion 17 is to force the flap element 25 against its seat to seal off the inlet passage. This prevents back-flow of fuel from the pumping chamber 28 into the inlet passage 39 during the pumping stroke of the diaphragm. At the outlet check valve portion 18 there is a simultaneous increase in pressure in the bore 44 which causes it to exceed the pressure within the outlet valve'chamber 45. This causes thefiap element-32 to be lifted from-its seat (as shown in Fig. "1)*and permits 4: a some of the fuel in the pumping chamber 28 to be forced out under pressure into the outlet passage 46. As the flap element 32 is lifted in this manner, however, the webs 34 prevent it from being displaced very far out of the plane of the surrounding diaphragm, yet do not substantially hinder the fiow of fuel into the valve chamber 45.
Because of the restraining action of the webs 31 and 34, the flap elements 29-and-32' respectively are not excessively displaced. Asa result they do not become so stressed as to warp even after prolonged use. Also, if thermal stresses due to overheating tend to cause curling of the diaphragm material, the webs minimize the deformation of the valve fiaps and insure that they sufiiciently retain their original flat shape to continue to seat eifectively. The webs 31 and 34 likewise compensate for uneven stress which might be imparted to the flap elements 29 and 32 by excessive tightening together of the body members 10 and 11 during assembly of the pump.
Turning now to Fig. 3, a modified form of the pump diaphragm 50 is shown. The diaphragm 50 includes a central pumping portion 52, inlet and outlet check valve portions 53 and 54 respectively, and a peripheral gasket portion 55 which makes up the remainder of the diaphragms area. Since the diaphragm 50 is to be assembled with a pair of pump body members in the manner described previously, a plurality of apertures 57 are located in its gasket portion 55 to accommodate the screws for holding the pump body members together.
The inlet check valve portion 53 includes a cut-out section 59 into which extends a fiat valve flap 60, which is joined integrally at its base to the main body of the diaphragm. Bridging the cut-out section 59 and integrally joining the outermost end of the valve flap 60 to the main body of the diaphragm is a single web finger 61. This finger limits the displacement of the flap 60 out of the plane of the diaphragm sheet and aids in preventing it from being distorted out of its original flat shape. The cut-out section 59 shown in Fig. 3 extends to one side of the flap element 60. Hence, this check valve portion is adapted for use in a valve chamber wherein the inlet passage is not in radial alignment with the bores leading from the valve chamber to the pumping chamber.
The outlet check valve portion 54 is of still different construction. It includes a circular valve flap 63 disposed in a concentric cut-out section 64. The ,valve flap 63 is integrally joined to the main body of the diaphragm by' a plurality of web fingers 66 which bridge the cutout section 64. Any one of these web fingers can be regarded as defining the base of the circular valve flap, and the others as joined to the free end of the valve flap. This type of valve flap is particularly adapted for use in the outlet valve chamber of a pump wherein the fuel enters through the cut-out section and exits from the chamber without passing back through the diaphragm. An example of such arrangement is shown in Figs. 1 and 2 where the pressurized fuel enters from the bore 44 into the outlet valve chamber 45 and then exits therefrom through the outlet passage 46 without passing back through the diaphragm. One of the primary advantages of this outlet check valve portion 54 is that the flap element 63 is lifted substantially evenly from its seat when fuel passes therethrough, thereby tending to insure that the valve flap element seats fiat when it returns to sealing engagement with its associated fuel passage.
I claim:
1. For use in a diaphragm-type pump, a unitary flexible substantially flat sheet diaphragm comprising a displaceable pumping portion adapted to partly define a pumping chamber, at least one check valve portion adapted to control flow of fluid through. said pump, said check'valve portion comprising a fiat valve flap having a base integral with said diaphragm and an end portion essentially separatedby cut-outsections from the main body of said diaphragm, the end portion of said valve flap being dis.-
placeable out of the plane of said diaphragm, and at least one flexible web finger bridging said cut-out sections and joining the end portion of said valve flap tosaid diaphragm, said web finger limiting without preventing displacement of said end portion of the valve flap out of the plane of the diaphragm.
2. A diaphragm-type fuel pump comprising two body members joined together in substantially face-to-face relationship, a flexible diaphragm separating the substantially cojoined faces of said body members, said diaphragm including a pumping portion which partly defines a pumping chamber in one of said body members, both of said body members having fuel inlet and outlet passages formed therein communicating with said pumping chamber, said diaphragm also including check valve portions located in said fuel passages for controlling flow of fluid through said pump, at least one of said check valve portions comprising a flat valve flap having a base integral with said diaphragm and an end portionressentially separated by cut-out sections from the main body of said diaphragm, the end portion of said valve flap normally being in sealing relation with the fuel passage with which it is associated and being displaceable out of the plane of said diaphragm to permit flow of fuel through its associated fuel passage, and at least one flexible web finger bridging said cut-out sections and joining the end portion of said valve" flap to said diaphragm, said web finger limiting without preventing displacement of said end portion of the valve flap out of the plane of the diaphragm.
3. For use in a diaphragm-type fuel pump, a diaphragm of substantially flat flexible material comprising a displaceable pumping portion adapted to partly define a pumping chamber, and two separate check valve portions adapted to maintain unidirectional flow of fuel through said pump, each of said check valve portions comprising a valve flap having a base joined integrally to said diaphragm and an end portion essentially separated by cut-out sections from the main body of the diaphragm, the end portion of said valve flap being displaceable out of the plane of said diaphragm, and restraining means comprising at least one web finger integrally joined both to the end portion of said valve flap and to the main body of the diaphragm bridging said cut-out sections and limiting without preventing displacement of said end portion of the valve flap out of the plane of the diaphragm.
4. For use in a diaphragm-type fuel pump, a diaphragm according to claim 3 wherein the restraining means in at least one of said check valve portions comprises two integral separate web fingers bridging the cut-out sections from opposite sides of the end portion of the valve flap to the main body of the diaphragm.
5. For use in a diaphragm-type fuel pump a diaphragm according to claim 3 wherein the restraining means in at least one of said check valve portions comprises a single integral web finger bridging the cut-out sections from the outermost end of the valve flap to the main body of the diaphragm.
6. A diaphragm-type fuel pump comprising two body members joined together in substantially face-to-face relationship, a substantially fiat flexible diaphragm separating the substantially cojoined faces of said'body members, said diaphragm including a pumping portion which partly defines an actuating chamber in one of said body members and a pumping chamber in the other of said body members, said actuating chamber being adapted to communicate with a source of fluctuating fluid pressure, both of said body members having fuel inlet and outlet passages formed therein communicating with said pumping chamber, said diaphragm also including two separate check valve portions located in the respective fuel passages for maintaining unidirectional flow of fuel through said pump, each of said check valve portions comprising a flat valve flap having a base integral with said diaphragm and an end portion essentially separated by cutout sections from the main body of said diaphragm, the end portion of said valve flap normally being in sealing relation with the fuel passage with which it is associated and being displaceable out of the plane of said diaphragm to permit flow of fuel through its associated fuel passage, and at least one flexible web finger bridging said cut-out sections and joining the end portion of said valve flap to said diaphragm, said web finger limiting without preventing displacement of said end portion of the valve flap out of the plane of the diaphragm.
References Cited in the file of this patent UNITED STATES PATENTS Scholer Apr. 29, 1958 i
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US79612259 US2980032A (en) | 1959-02-27 | 1959-02-27 | Fuel pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US79612259 US2980032A (en) | 1959-02-27 | 1959-02-27 | Fuel pump |
Publications (1)
Publication Number | Publication Date |
---|---|
US2980032A true US2980032A (en) | 1961-04-18 |
Family
ID=25167357
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US79612259 Expired - Lifetime US2980032A (en) | 1959-02-27 | 1959-02-27 | Fuel pump |
Country Status (1)
Country | Link |
---|---|
US (1) | US2980032A (en) |
Cited By (57)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3182601A (en) * | 1962-11-26 | 1965-05-11 | Acf Ind Inc | Fuel pump |
US3240128A (en) * | 1961-12-18 | 1966-03-15 | Itt | Flexible diaphragm operated valve structure |
US3263701A (en) * | 1962-11-26 | 1966-08-02 | Acf Ind Inc | Valve structure |
US3424063A (en) * | 1964-11-19 | 1969-01-28 | Ibm | Apparatus using diaphragm - type fluidcontrolled logic devices and method of making same |
US3424091A (en) * | 1966-10-03 | 1969-01-28 | Tillotson Mfg Co | Fuel pump for charge forming apparatus |
US3496872A (en) * | 1968-05-31 | 1970-02-24 | Trico Products Corp | Rotary motor driven pump |
US3646701A (en) * | 1970-05-04 | 1972-03-07 | Mc Graw Edison Co | Portable thermal fogger |
US3741687A (en) * | 1970-04-15 | 1973-06-26 | Nystroem Ernst Holger Bertil | Jet-actuated membrane pump |
JPS4939005U (en) * | 1972-07-08 | 1974-04-06 | ||
US3941519A (en) * | 1974-09-12 | 1976-03-02 | Mccauley Herbert J | Pump |
US3986644A (en) * | 1975-05-21 | 1976-10-19 | Diamond International Corporation | Dispensing pump |
US3995774A (en) * | 1975-09-12 | 1976-12-07 | Diamond International Corporation | Liquid dispenser having deformable diaphragm type pump |
US4181477A (en) * | 1978-03-02 | 1980-01-01 | Pace Incorporated | Pump valve |
US4310107A (en) * | 1975-10-29 | 1982-01-12 | The Afa Corporation | Manually operated, trigger actuated diaphragm pump dispenser |
DE3221725A1 (en) * | 1981-06-24 | 1983-01-13 | Cordis Dow Corp., Miami, fla. | BLOOD PUMP |
US4379681A (en) * | 1980-01-04 | 1983-04-12 | Paul R. Goudy, Jr. | Fluid pump with dual diaphragm check valves |
FR2525697A1 (en) * | 1982-04-21 | 1983-10-28 | Utilisation Ration Gaz | TWO STAGE VOLUMETRIC PUMP FOR LIQUEFIED LIQUID PHASE OIL GASES, AND FUEL INJECTION METHOD FOR MOTOR VEHICLE ENGINE USING SUCH PUMP |
US4468222A (en) * | 1976-05-24 | 1984-08-28 | Valleylab | Intravenous liquid pumping system and method |
US4479760A (en) * | 1982-12-28 | 1984-10-30 | Baxter Travenol Laboratories, Inc. | Actuator apparatus for a prepackaged fluid processing module having pump and valve elements operable in response to applied pressures |
US4479762A (en) * | 1982-12-28 | 1984-10-30 | Baxter Travenol Laboratories, Inc. | Prepackaged fluid processing module having pump and valve elements operable in response to applied pressures |
US4479761A (en) * | 1982-12-28 | 1984-10-30 | Baxter Travenol Laboratories, Inc. | Actuator apparatus for a prepackaged fluid processing module having pump and valve elements operable in response to externally applied pressures |
US4552178A (en) * | 1982-04-07 | 1985-11-12 | Scanpump Ab | Variable fluid flow restricting throttle |
US4594971A (en) * | 1984-10-26 | 1986-06-17 | Outboard Marine Corporation | Variable fuel/oil ratio pump for two-stroke internal combustion engine |
US4646781A (en) * | 1985-05-07 | 1987-03-03 | Pacesetter Infusion, Ltd. | Diaphragm valve for medication infusion pump |
US5462256A (en) * | 1994-05-13 | 1995-10-31 | Abbott Laboratories | Push button flow stop useable with a disposable infusion pumping chamber cassette |
US5593290A (en) * | 1994-12-22 | 1997-01-14 | Eastman Kodak Company | Micro dispensing positive displacement pump |
US5697770A (en) * | 1994-12-23 | 1997-12-16 | Robert Bosch Gmbh | Pump using a single diaphragm having preformed oppositely directed bulges forming inlet and outlet valve closing bodies |
US5718567A (en) * | 1993-09-25 | 1998-02-17 | Forschungszentrum Karlsruhe Gmbh | Micro diaphragm pump |
US5816779A (en) * | 1994-05-13 | 1998-10-06 | Abbott Laboratories | Disposable fluid infusion pumping cassette having an interrelated flow control and pressure monitoring arrangement |
US20040115068A1 (en) * | 2002-09-27 | 2004-06-17 | Steffen Hansen | Membrane pump with stretchable pump membrane |
US20050016596A1 (en) * | 2002-05-03 | 2005-01-27 | Mijers Jan W. M. | Unidirectional valve appliance |
EP1513211A2 (en) * | 2003-09-05 | 2005-03-09 | Samsung Electronics Co., Ltd. | Fuel supply device for direct methanol fuel cells |
US20050074340A1 (en) * | 2003-10-01 | 2005-04-07 | Agency For Science, Technology And Research | Micro-pump |
WO2005094919A1 (en) | 2004-03-30 | 2005-10-13 | Novo Nordisk A/S | Actuator system comprising detection means |
US20060095014A1 (en) * | 2003-05-08 | 2006-05-04 | Novo Nordisk A/S | External inserter for transcutaneous device |
US20060142698A1 (en) * | 2003-05-08 | 2006-06-29 | Novo Nordisk A/S | Internal needle inserter |
US20060137763A1 (en) * | 2004-11-22 | 2006-06-29 | Brendan Hogan | Air vent foil cutter |
US20070021733A1 (en) * | 2003-10-21 | 2007-01-25 | Novo Nordisk A/S | Internal fluid connector |
US20070049865A1 (en) * | 2003-08-01 | 2007-03-01 | Novo Nordisk A/S | Retraction means for transcutaneous device |
US20070104596A1 (en) * | 2004-03-30 | 2007-05-10 | Novo Nordisk A/S | Actuator system comprising lever mechanism |
US20070163599A1 (en) * | 2004-06-07 | 2007-07-19 | Mijers Jan W | Apparatus for connecting a respiratory device with a patient |
US20070163664A1 (en) * | 2004-06-17 | 2007-07-19 | Mijers Jan W M | Check valve |
US20080167641A1 (en) * | 2005-05-13 | 2008-07-10 | Novo Nordisk A/S | Medical Device Adapted To Detect Disengagement Of A Transcutaneous Device |
US20080215006A1 (en) * | 2004-09-22 | 2008-09-04 | Novo Nordisk A/S | Medical Device with Transcutaneous Cannula Device |
US20090012472A1 (en) * | 2004-09-22 | 2009-01-08 | Novo Nordisk A/S | Medical Device with Cannula Inserter |
US20090048563A1 (en) * | 2004-12-06 | 2009-02-19 | Novo Nordisk A/S | Ventilated Skin Mountable Device |
US20090062778A1 (en) * | 2006-03-13 | 2009-03-05 | Novo Nordisk A/S | Medical System Comprising Dual-Purpose Communication Means |
US20090069868A1 (en) * | 2006-03-11 | 2009-03-12 | Henrik Bengtsson | Secure Pairing of Electronic Devices using Dual Means of Communication |
US20090076451A1 (en) * | 2005-01-24 | 2009-03-19 | Nova Nordisk A/S | Medical Device with Protected Transcutaneous Device |
US20090163874A1 (en) * | 2006-04-26 | 2009-06-25 | Novo Nordisk A/S | Skin-Mountable Device in Packaging Comprising Coated Seal Member |
US20090254041A1 (en) * | 2006-06-06 | 2009-10-08 | Krag Christian Roege | Assembly Comprising Skin-Mountable Device and Packaging Therefore |
US20100063448A1 (en) * | 2007-03-06 | 2010-03-11 | Novo Nordisk A/S | Pump assembly comprising actuator system |
US20110008206A1 (en) * | 2007-10-31 | 2011-01-13 | Novo Nordisk A/S | Non-Porous Material as Sterilization Barrier |
US20110060289A1 (en) * | 2003-05-08 | 2011-03-10 | Novo Nordisk A/S | Integrated package |
GB2547944A (en) * | 2016-03-04 | 2017-09-06 | Intelligent Energy Ltd | Diaphragm pump |
US10578098B2 (en) | 2005-07-13 | 2020-03-03 | Baxter International Inc. | Medical fluid delivery device actuated via motive fluid |
US11478578B2 (en) | 2012-06-08 | 2022-10-25 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassettes and related systems and methods |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2796838A (en) * | 1955-11-30 | 1957-06-25 | Tillotson Mfg Co | Fuel feed and charge forming apparatus |
US2809589A (en) * | 1955-03-11 | 1957-10-15 | Chalmers H Randolph | Electro-magnetically operated pump |
US2832373A (en) * | 1954-01-22 | 1958-04-29 | Gunner L Scholer | Liquid treating unit |
-
1959
- 1959-02-27 US US79612259 patent/US2980032A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2832373A (en) * | 1954-01-22 | 1958-04-29 | Gunner L Scholer | Liquid treating unit |
US2809589A (en) * | 1955-03-11 | 1957-10-15 | Chalmers H Randolph | Electro-magnetically operated pump |
US2796838A (en) * | 1955-11-30 | 1957-06-25 | Tillotson Mfg Co | Fuel feed and charge forming apparatus |
Cited By (82)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3240128A (en) * | 1961-12-18 | 1966-03-15 | Itt | Flexible diaphragm operated valve structure |
US3182601A (en) * | 1962-11-26 | 1965-05-11 | Acf Ind Inc | Fuel pump |
US3263701A (en) * | 1962-11-26 | 1966-08-02 | Acf Ind Inc | Valve structure |
US3424063A (en) * | 1964-11-19 | 1969-01-28 | Ibm | Apparatus using diaphragm - type fluidcontrolled logic devices and method of making same |
US3424091A (en) * | 1966-10-03 | 1969-01-28 | Tillotson Mfg Co | Fuel pump for charge forming apparatus |
US3496872A (en) * | 1968-05-31 | 1970-02-24 | Trico Products Corp | Rotary motor driven pump |
US3741687A (en) * | 1970-04-15 | 1973-06-26 | Nystroem Ernst Holger Bertil | Jet-actuated membrane pump |
US3646701A (en) * | 1970-05-04 | 1972-03-07 | Mc Graw Edison Co | Portable thermal fogger |
JPS4939005U (en) * | 1972-07-08 | 1974-04-06 | ||
JPS5141201Y2 (en) * | 1972-07-08 | 1976-10-07 | ||
US3941519A (en) * | 1974-09-12 | 1976-03-02 | Mccauley Herbert J | Pump |
US3986644A (en) * | 1975-05-21 | 1976-10-19 | Diamond International Corporation | Dispensing pump |
US3995774A (en) * | 1975-09-12 | 1976-12-07 | Diamond International Corporation | Liquid dispenser having deformable diaphragm type pump |
US4310107A (en) * | 1975-10-29 | 1982-01-12 | The Afa Corporation | Manually operated, trigger actuated diaphragm pump dispenser |
US4468222A (en) * | 1976-05-24 | 1984-08-28 | Valleylab | Intravenous liquid pumping system and method |
US4181477A (en) * | 1978-03-02 | 1980-01-01 | Pace Incorporated | Pump valve |
US4379681A (en) * | 1980-01-04 | 1983-04-12 | Paul R. Goudy, Jr. | Fluid pump with dual diaphragm check valves |
DE3221725A1 (en) * | 1981-06-24 | 1983-01-13 | Cordis Dow Corp., Miami, fla. | BLOOD PUMP |
US4552178A (en) * | 1982-04-07 | 1985-11-12 | Scanpump Ab | Variable fluid flow restricting throttle |
FR2525697A1 (en) * | 1982-04-21 | 1983-10-28 | Utilisation Ration Gaz | TWO STAGE VOLUMETRIC PUMP FOR LIQUEFIED LIQUID PHASE OIL GASES, AND FUEL INJECTION METHOD FOR MOTOR VEHICLE ENGINE USING SUCH PUMP |
US4479760A (en) * | 1982-12-28 | 1984-10-30 | Baxter Travenol Laboratories, Inc. | Actuator apparatus for a prepackaged fluid processing module having pump and valve elements operable in response to applied pressures |
US4479762A (en) * | 1982-12-28 | 1984-10-30 | Baxter Travenol Laboratories, Inc. | Prepackaged fluid processing module having pump and valve elements operable in response to applied pressures |
US4479761A (en) * | 1982-12-28 | 1984-10-30 | Baxter Travenol Laboratories, Inc. | Actuator apparatus for a prepackaged fluid processing module having pump and valve elements operable in response to externally applied pressures |
US4594971A (en) * | 1984-10-26 | 1986-06-17 | Outboard Marine Corporation | Variable fuel/oil ratio pump for two-stroke internal combustion engine |
US4646781A (en) * | 1985-05-07 | 1987-03-03 | Pacesetter Infusion, Ltd. | Diaphragm valve for medication infusion pump |
US5718567A (en) * | 1993-09-25 | 1998-02-17 | Forschungszentrum Karlsruhe Gmbh | Micro diaphragm pump |
US5816779A (en) * | 1994-05-13 | 1998-10-06 | Abbott Laboratories | Disposable fluid infusion pumping cassette having an interrelated flow control and pressure monitoring arrangement |
US5462256A (en) * | 1994-05-13 | 1995-10-31 | Abbott Laboratories | Push button flow stop useable with a disposable infusion pumping chamber cassette |
US5593290A (en) * | 1994-12-22 | 1997-01-14 | Eastman Kodak Company | Micro dispensing positive displacement pump |
US5697770A (en) * | 1994-12-23 | 1997-12-16 | Robert Bosch Gmbh | Pump using a single diaphragm having preformed oppositely directed bulges forming inlet and outlet valve closing bodies |
US6932110B2 (en) * | 2002-05-03 | 2005-08-23 | Filtertek Inc. | Unidirectional valve appliance |
US20050016596A1 (en) * | 2002-05-03 | 2005-01-27 | Mijers Jan W. M. | Unidirectional valve appliance |
US6948918B2 (en) | 2002-09-27 | 2005-09-27 | Novo Nordisk A/S | Membrane pump with stretchable pump membrane |
US20040115068A1 (en) * | 2002-09-27 | 2004-06-17 | Steffen Hansen | Membrane pump with stretchable pump membrane |
US8029469B2 (en) | 2003-05-08 | 2011-10-04 | Novo Nordisk A/S | External inserter for transcutaneous device |
US7981085B2 (en) | 2003-05-08 | 2011-07-19 | Novo Nordisk A/S | Internal needle inserter |
US8740851B2 (en) | 2003-05-08 | 2014-06-03 | Novo Nordisk A/S | Integrated package |
US20060095014A1 (en) * | 2003-05-08 | 2006-05-04 | Novo Nordisk A/S | External inserter for transcutaneous device |
US20060142698A1 (en) * | 2003-05-08 | 2006-06-29 | Novo Nordisk A/S | Internal needle inserter |
US20110060289A1 (en) * | 2003-05-08 | 2011-03-10 | Novo Nordisk A/S | Integrated package |
US7955297B2 (en) | 2003-08-01 | 2011-06-07 | Novo Nordisk A/S | Retraction means for transcutaneous device |
US20070049865A1 (en) * | 2003-08-01 | 2007-03-01 | Novo Nordisk A/S | Retraction means for transcutaneous device |
EP1513211A3 (en) * | 2003-09-05 | 2006-12-27 | Samsung SDI Co., Ltd. | Fuel supply device for direct methanol fuel cells |
EP1513211A2 (en) * | 2003-09-05 | 2005-03-09 | Samsung Electronics Co., Ltd. | Fuel supply device for direct methanol fuel cells |
US7695842B2 (en) | 2003-09-05 | 2010-04-13 | Samsung Sdi Co., Ltd. | Fuel supply device for direct methanol fuel cells |
US20080063543A1 (en) * | 2003-10-01 | 2008-03-13 | Agency For Science Technology And Research | Micro-pump |
US20050074340A1 (en) * | 2003-10-01 | 2005-04-07 | Agency For Science, Technology And Research | Micro-pump |
US7284966B2 (en) * | 2003-10-01 | 2007-10-23 | Agency For Science, Technology & Research | Micro-pump |
US20070021733A1 (en) * | 2003-10-21 | 2007-01-25 | Novo Nordisk A/S | Internal fluid connector |
WO2005094919A1 (en) | 2004-03-30 | 2005-10-13 | Novo Nordisk A/S | Actuator system comprising detection means |
US20070104596A1 (en) * | 2004-03-30 | 2007-05-10 | Novo Nordisk A/S | Actuator system comprising lever mechanism |
US20110166524A1 (en) * | 2004-03-30 | 2011-07-07 | Novo Nordisk A/S | Actuator System Comprising Lever Mechanism |
US7922462B2 (en) | 2004-03-30 | 2011-04-12 | Novo Nordisk A/S | Actuator system comprising lever mechanism |
US20070112301A1 (en) * | 2004-03-30 | 2007-05-17 | Novo Nordisk A/S | Actuator system comprising detector means |
USRE43886E1 (en) | 2004-06-07 | 2013-01-01 | Illinois Tool Works Inc. | Apparatus for connecting a respiratory device with a patient |
US20070163599A1 (en) * | 2004-06-07 | 2007-07-19 | Mijers Jan W | Apparatus for connecting a respiratory device with a patient |
US7717116B2 (en) | 2004-06-07 | 2010-05-18 | Filtertek Inc. | Apparatus for connecting a respiratory device with a patient |
US7673653B2 (en) | 2004-06-17 | 2010-03-09 | Filtertek Inc. | Check valve |
US20070163664A1 (en) * | 2004-06-17 | 2007-07-19 | Mijers Jan W M | Check valve |
US20090012472A1 (en) * | 2004-09-22 | 2009-01-08 | Novo Nordisk A/S | Medical Device with Cannula Inserter |
US20080215006A1 (en) * | 2004-09-22 | 2008-09-04 | Novo Nordisk A/S | Medical Device with Transcutaneous Cannula Device |
US20060137763A1 (en) * | 2004-11-22 | 2006-06-29 | Brendan Hogan | Air vent foil cutter |
US7516765B2 (en) | 2004-11-22 | 2009-04-14 | Filtertek Inc. | Air vent foil cutter |
US20090048563A1 (en) * | 2004-12-06 | 2009-02-19 | Novo Nordisk A/S | Ventilated Skin Mountable Device |
US20090076451A1 (en) * | 2005-01-24 | 2009-03-19 | Nova Nordisk A/S | Medical Device with Protected Transcutaneous Device |
US8167841B2 (en) | 2005-01-24 | 2012-05-01 | Novo Nordisk A/S | Transcutaneous device assembly |
US20080167641A1 (en) * | 2005-05-13 | 2008-07-10 | Novo Nordisk A/S | Medical Device Adapted To Detect Disengagement Of A Transcutaneous Device |
US10578098B2 (en) | 2005-07-13 | 2020-03-03 | Baxter International Inc. | Medical fluid delivery device actuated via motive fluid |
US10590924B2 (en) | 2005-07-13 | 2020-03-17 | Baxter International Inc. | Medical fluid pumping system including pump and machine chassis mounting regime |
US10670005B2 (en) | 2005-07-13 | 2020-06-02 | Baxter International Inc. | Diaphragm pumps and pumping systems |
US11384748B2 (en) | 2005-07-13 | 2022-07-12 | Baxter International Inc. | Blood treatment system having pulsatile blood intake |
US20090069868A1 (en) * | 2006-03-11 | 2009-03-12 | Henrik Bengtsson | Secure Pairing of Electronic Devices using Dual Means of Communication |
US9173992B2 (en) | 2006-03-13 | 2015-11-03 | Novo Nordisk A/S | Secure pairing of electronic devices using dual means of communication |
US20090062778A1 (en) * | 2006-03-13 | 2009-03-05 | Novo Nordisk A/S | Medical System Comprising Dual-Purpose Communication Means |
US20090163874A1 (en) * | 2006-04-26 | 2009-06-25 | Novo Nordisk A/S | Skin-Mountable Device in Packaging Comprising Coated Seal Member |
US9399094B2 (en) | 2006-06-06 | 2016-07-26 | Novo Nordisk A/S | Assembly comprising skin-mountable device and packaging therefore |
US20090254041A1 (en) * | 2006-06-06 | 2009-10-08 | Krag Christian Roege | Assembly Comprising Skin-Mountable Device and Packaging Therefore |
US20100063448A1 (en) * | 2007-03-06 | 2010-03-11 | Novo Nordisk A/S | Pump assembly comprising actuator system |
US8557179B2 (en) | 2007-10-31 | 2013-10-15 | Novo Nordisk A/S | Non-porous material as sterilization barrier |
US20110008206A1 (en) * | 2007-10-31 | 2011-01-13 | Novo Nordisk A/S | Non-Porous Material as Sterilization Barrier |
US11478578B2 (en) | 2012-06-08 | 2022-10-25 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassettes and related systems and methods |
GB2547944A (en) * | 2016-03-04 | 2017-09-06 | Intelligent Energy Ltd | Diaphragm pump |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2980032A (en) | Fuel pump | |
US3765802A (en) | Feed and proportioning pump | |
US1669889A (en) | Compressor valve | |
US2542254A (en) | Flexible valve member | |
KR920701670A (en) | Improved micropump. | |
US4437490A (en) | Reed valve assembly | |
ES8204809A1 (en) | Diaphragm pump. | |
US1416771A (en) | Valve | |
US2715418A (en) | Diaphragm valve for a carburetor | |
US3045605A (en) | Fuel feeding means | |
US2707074A (en) | Pump | |
US3145659A (en) | Suction actuated fuel pump | |
ATE57269T1 (en) | CONTROL VALVE. | |
US2646077A (en) | Multilayer diaphragm | |
US2713858A (en) | Gas pump for outboard motor | |
US2287841A (en) | Fluid transfer apparatus | |
US3368495A (en) | Fuel feed system and fuel pump | |
US3319879A (en) | Valve mechanism | |
US3556687A (en) | Fuel pump for small engines | |
US2987303A (en) | Internal combustion engine and fuel system therefor | |
US3320900A (en) | Fuel pump | |
US2462372A (en) | Pump | |
GB1518811A (en) | Flow control valves for liquids | |
US4153078A (en) | Composite valve | |
US3491700A (en) | Fuel pump |