CA1278975C - Vacuum-breaking valve for pressurized fluid lines - Google Patents
Vacuum-breaking valve for pressurized fluid linesInfo
- Publication number
- CA1278975C CA1278975C CA000542641A CA542641A CA1278975C CA 1278975 C CA1278975 C CA 1278975C CA 000542641 A CA000542641 A CA 000542641A CA 542641 A CA542641 A CA 542641A CA 1278975 C CA1278975 C CA 1278975C
- Authority
- CA
- Canada
- Prior art keywords
- valve
- housing
- backup plate
- vacuum
- line
- 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
Classifications
-
- 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
- F16K15/148—Check valves with flexible valve members the closure elements being fixed in their centre
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/02—Plumbing installations for fresh water
- E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
- E03C1/108—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves having an aerating 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
- Y10T137/3149—Back flow prevention by vacuum breaking [e.g., anti-siphon devices]
- Y10T137/3185—Air vent in liquid flow line
- Y10T137/3294—Valved
-
- 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
- Y10T137/7504—Removable valve head and seat unit
-
- 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]
- Y10T137/7869—Biased open
-
- 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
- Y10T137/789—Central mount
Abstract
Abstract For use in pressurized fluid lines, an anti-siphon and back-flow prevention valve. A conduit is tapped into the line upstream of an outlet terminating in a bell-shaped housing. The housing receives check valve means arranged for insuring that fluid does not escape during normal operation of the line, but for admitting vacuum-breaking air in the event of line pressure loss.
Description
~2~8~37~
VACUU~-BREAKING VALVE FOR PRESSURI~ED FLUID LINES
Backqround and General Statement of the Invention This invention relates to vacuum-breaking valves for pressurized fluid lines.
Vacuum-breaking valves of the general type described herein are used widely in fluid supply systems to prevent back siphoning, or flow reversal whenever an operational variant causes a vacuum to be produced in the supply system.
This is of particular importance in the case of Municpal Water Supply Systems which are subject to pressure variation.
If the pressure in the supply system drops below atmospheric pressure, even momentarily, contaminating materials present in the house delivery system may be drawn into the main line with ohviously disadvantageous results.
Such a situation ma~ occur, for example, ~hen water is supplied to mortuaries, hospitals, laboratories, laundries, chemical processing installations and the like. All of these may introduce serious sources of contamination into possible communication with the domestic tap water. Examples of such sources are the formaldehyde wash waters used for disinfecting kidney machines; mortuary fluids and wash waters; bacteriologically contaminated laboratory solutions;
poisonous chemical solutions, etc.
No problem exists as long as normal pressure is maintained on the house line supplying water under pressure to the installation. However, in the event of failure of - ~ :
~ ~t7~97~;
VACUU~-BREAKING VALVE FOR PRESSURI~ED FLUID LINES
Backqround and General Statement of the Invention This invention relates to vacuum-breaking valves for pressurized fluid lines.
Vacuum-breaking valves of the general type described herein are used widely in fluid supply systems to prevent back siphoning, or flow reversal whenever an operational variant causes a vacuum to be produced in the supply system.
This is of particular importance in the case of Municpal Water Supply Systems which are subject to pressure variation.
If the pressure in the supply system drops below atmospheric pressure, even momentarily, contaminating materials present in the house delivery system may be drawn into the main line with ohviously disadvantageous results.
Such a situation ma~ occur, for example, ~hen water is supplied to mortuaries, hospitals, laboratories, laundries, chemical processing installations and the like. All of these may introduce serious sources of contamination into possible communication with the domestic tap water. Examples of such sources are the formaldehyde wash waters used for disinfecting kidney machines; mortuary fluids and wash waters; bacteriologically contaminated laboratory solutions;
poisonous chemical solutions, etc.
No problem exists as long as normal pressure is maintained on the house line supplying water under pressure to the installation. However, in the event of failure of - ~ :
~ ~t7~97~;
the pressurized water source, disconnecting the pressurized line for purposes of installation or repair or other occurrences, circumstances frequently arise wherein the pressure in the pressurized house line is reduced sharply.
A vacuum may even be created. In such occurrences, con-taminating fluids may be drawn into the system and sub-sequently discharged through the domestic tap.
It is the general purpose of the present invention to provide a vacuum-breaXing valve or pressurized fluid lines which provides a solution to the above described problem.
It is a further object of the present invention to provide a vacuum-breaking valve which is simple in con-struction, efficient in operation, easily installed, adaptable for use in a wide variety of plumbing situations;
and reliable and trouble-free in operation.
Broadly stated, the vacuum-breaking valve of my invention is adapted for use in a pressurized ~luid line delivering liquid to an outlet; It includes a conduit adapted for tapping into the line upstream of the outlet.
A beLl-shaped housing connects to the conduit and is mounted thereon, in inverted position. The interior of the housing has an annular, outwardly facing shoulder which provides a seat for check valve means dimensioned f~r re-ception in the housing.
~'78~
A retainer is positioned in the housing for releasablv retaining the check valve therein. As long as pressure is maintained in the fluid line, the chec.'~ valve remains closed.
However, if there is a serious drop in pressure in the line, the check valve opens, admitting air, breaking the vacuum, and preventing back-flow of contaminated materials into the system.
The Drawin~s In the Drawings:
Figurs 1 is a view in side elevation, partly in section, of the vacuum breaking valve of my invention in its use position.
Figure 2 is an exploded, top perspective view o~ the valve.
Figures 3 and 4 ar~ fragmentary, longitudinal, sectional views of the valve in operation, Figure 3 showing the valve in its closed, pressurized position and Figure 4 showing the valve in its open, vacuum-breaXing position.
Description of a Preferred Embodiment Referring to Figure 1, the valve, indicated generally at 10, is illustrated connected to a pressurized fluid con-duit or house line 12, and a delivery line 14 leading, for example, to an appliance which might be a source of con-tamination in the event of the development of vacuum in house line 12.
The valve assembly is connected to a conduit 16 adapted to be tapped into the house line just upstream from the outlet.
Referring to Figure 2, the valve elements are housed in a bell-shaped housing 18 threaded onto the outer end of conduit 16. The in.erior of the housing is provided ~ith an annular, outwardly facing shoulder 20 and, a spaced distance outwardly thereof, an annular groove 22.
The valve assembly includes an outwardly concave, perforated, backup plate 23, a floating, centrally ported valve seat plate 24, and a flexible valve disc 26. In the assembled condition, backup plate 23 is inter-connected with valve disc 26 by means of a rivet 28 or other suitable interconnecting means.
The assembled check valve thus has the appearance illustrated in Figures 3 and 4. Valve seat plate 24 is confined by rivet 28 in operative position between backup plate 23 and valve disc 26.
Retaining means is provided for releasably retaining the valve assembly within housing 18. In the illustrated form of the invention, the retaining means comprises a snap ring 30 releasably seated in annular groove 22.
When assembled, backup plate 23 bears against retaining ring 30 and the margins of valve seat plate 24 are seated ~89~i against shoulder 20. Both the valve seat plate 24 and valve disc 25 are fabricated from flexible materials such as natural or synthetic rubber, and accordingly conform to the inwardly concave, or bowed, structure of backup plate 23. As is especially evident in Figure 3, this enables the assembly to withstand the substantial pressure e~erted by the fluid present in the system.
The use positions of the check valve assembly are also illustrated in Figures 3 and 4.
In Figure 3, the normal condition of the valve assembly is illustrated, closed against escape of pressurized fluid within the system.
Figure 4 illustrates the open position of the valve, which occurs when a condition of reduced pressure is present within the system. When that occurs, atmospheric air passes through the perforations in backup plate 23, through the central opening in valve seat plate 24, and around the edges of the inwardly fle~ed valve disc 26. This breaks the vacuum and prevents the backflow of contaminating fluids present in delivery conduit 14 into the main line 12.
Having thus described in detail a preferred embodiment of the present invention, it will be apparent to those skilled in the art that various physical changes may be made in the device described herein without altering the inventive concepts and principles embodied. The present 37~
embodiment is therefore to be considered in all respects as illustrative and not restrictive, the scope o~ the invention being indicated by the appended claims. All changes which come within the meaning and range of equivalency of the claims are therefore to be embraced therein.
I claim:
A vacuum may even be created. In such occurrences, con-taminating fluids may be drawn into the system and sub-sequently discharged through the domestic tap.
It is the general purpose of the present invention to provide a vacuum-breaXing valve or pressurized fluid lines which provides a solution to the above described problem.
It is a further object of the present invention to provide a vacuum-breaking valve which is simple in con-struction, efficient in operation, easily installed, adaptable for use in a wide variety of plumbing situations;
and reliable and trouble-free in operation.
Broadly stated, the vacuum-breaking valve of my invention is adapted for use in a pressurized ~luid line delivering liquid to an outlet; It includes a conduit adapted for tapping into the line upstream of the outlet.
A beLl-shaped housing connects to the conduit and is mounted thereon, in inverted position. The interior of the housing has an annular, outwardly facing shoulder which provides a seat for check valve means dimensioned f~r re-ception in the housing.
~'78~
A retainer is positioned in the housing for releasablv retaining the check valve therein. As long as pressure is maintained in the fluid line, the chec.'~ valve remains closed.
However, if there is a serious drop in pressure in the line, the check valve opens, admitting air, breaking the vacuum, and preventing back-flow of contaminated materials into the system.
The Drawin~s In the Drawings:
Figurs 1 is a view in side elevation, partly in section, of the vacuum breaking valve of my invention in its use position.
Figure 2 is an exploded, top perspective view o~ the valve.
Figures 3 and 4 ar~ fragmentary, longitudinal, sectional views of the valve in operation, Figure 3 showing the valve in its closed, pressurized position and Figure 4 showing the valve in its open, vacuum-breaXing position.
Description of a Preferred Embodiment Referring to Figure 1, the valve, indicated generally at 10, is illustrated connected to a pressurized fluid con-duit or house line 12, and a delivery line 14 leading, for example, to an appliance which might be a source of con-tamination in the event of the development of vacuum in house line 12.
The valve assembly is connected to a conduit 16 adapted to be tapped into the house line just upstream from the outlet.
Referring to Figure 2, the valve elements are housed in a bell-shaped housing 18 threaded onto the outer end of conduit 16. The in.erior of the housing is provided ~ith an annular, outwardly facing shoulder 20 and, a spaced distance outwardly thereof, an annular groove 22.
The valve assembly includes an outwardly concave, perforated, backup plate 23, a floating, centrally ported valve seat plate 24, and a flexible valve disc 26. In the assembled condition, backup plate 23 is inter-connected with valve disc 26 by means of a rivet 28 or other suitable interconnecting means.
The assembled check valve thus has the appearance illustrated in Figures 3 and 4. Valve seat plate 24 is confined by rivet 28 in operative position between backup plate 23 and valve disc 26.
Retaining means is provided for releasably retaining the valve assembly within housing 18. In the illustrated form of the invention, the retaining means comprises a snap ring 30 releasably seated in annular groove 22.
When assembled, backup plate 23 bears against retaining ring 30 and the margins of valve seat plate 24 are seated ~89~i against shoulder 20. Both the valve seat plate 24 and valve disc 25 are fabricated from flexible materials such as natural or synthetic rubber, and accordingly conform to the inwardly concave, or bowed, structure of backup plate 23. As is especially evident in Figure 3, this enables the assembly to withstand the substantial pressure e~erted by the fluid present in the system.
The use positions of the check valve assembly are also illustrated in Figures 3 and 4.
In Figure 3, the normal condition of the valve assembly is illustrated, closed against escape of pressurized fluid within the system.
Figure 4 illustrates the open position of the valve, which occurs when a condition of reduced pressure is present within the system. When that occurs, atmospheric air passes through the perforations in backup plate 23, through the central opening in valve seat plate 24, and around the edges of the inwardly fle~ed valve disc 26. This breaks the vacuum and prevents the backflow of contaminating fluids present in delivery conduit 14 into the main line 12.
Having thus described in detail a preferred embodiment of the present invention, it will be apparent to those skilled in the art that various physical changes may be made in the device described herein without altering the inventive concepts and principles embodied. The present 37~
embodiment is therefore to be considered in all respects as illustrative and not restrictive, the scope o~ the invention being indicated by the appended claims. All changes which come within the meaning and range of equivalency of the claims are therefore to be embraced therein.
I claim:
Claims
CLAIMS: 1.
For use in a pressurized line delivering liquid to an outlet, a vacuum breaking valve for preventing backflow and siphoning comprising:
a) a conduit adapted for tapping into the line up-stream of the outlet, b) a bell-shaped housing connected to the conduit and mounted therein in inverted position, c) the interior of the housing having an annular, outwardly facing shoulder, d) check valve means dimensioned for reception in the housing, seated against the shoulder, and e) retaining means positioned in the housing for re-leasably retaining the check valve means therein.
2.
The valve of claim 1 wherein the check valve means com-prises:
a) a perforated backup plate adapted for bearing engage-ment with the retaining means, b) a floating, centrally ported valve seat plate seated against the shoulder and bearing against the backup plate, c) a flexible, valve disc overlying the port in the valve seat plate in valving relation thereto, and d) centrally located interconnecting means inter-connecting the backup plate and the valve disc, confining the valve seat plate in operative positions between them.
3.
The valve of claim 2 wherein the interconnecting means comprises rivet means.
4.
The valve of claim 2 wherein the retaining means comprises snap ring means.
5.
The valve of claim 2 wherein the backup plate is con-cavely arcuate.
For use in a pressurized line delivering liquid to an outlet, a vacuum breaking valve for preventing backflow and siphoning comprising:
a) a conduit adapted for tapping into the line up-stream of the outlet, b) a bell-shaped housing connected to the conduit and mounted therein in inverted position, c) the interior of the housing having an annular, outwardly facing shoulder, d) check valve means dimensioned for reception in the housing, seated against the shoulder, and e) retaining means positioned in the housing for re-leasably retaining the check valve means therein.
2.
The valve of claim 1 wherein the check valve means com-prises:
a) a perforated backup plate adapted for bearing engage-ment with the retaining means, b) a floating, centrally ported valve seat plate seated against the shoulder and bearing against the backup plate, c) a flexible, valve disc overlying the port in the valve seat plate in valving relation thereto, and d) centrally located interconnecting means inter-connecting the backup plate and the valve disc, confining the valve seat plate in operative positions between them.
3.
The valve of claim 2 wherein the interconnecting means comprises rivet means.
4.
The valve of claim 2 wherein the retaining means comprises snap ring means.
5.
The valve of claim 2 wherein the backup plate is con-cavely arcuate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/041,401 US4712574A (en) | 1987-04-23 | 1987-04-23 | Vacuum-breaking valve for pressurized fluid lines |
| US041,401 | 1987-04-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1278975C true CA1278975C (en) | 1991-01-15 |
Family
ID=21916330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000542641A Expired - Lifetime CA1278975C (en) | 1987-04-23 | 1987-07-22 | Vacuum-breaking valve for pressurized fluid lines |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4712574A (en) |
| CA (1) | CA1278975C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5088689A (en) * | 1988-10-31 | 1992-02-18 | Automatic Control Components, Inc. | Removable discharge sleeve in a disk valve |
| US4974632A (en) * | 1989-01-26 | 1990-12-04 | Ericson Kurt Sture Birger | Automatic air valves for ducts |
| US5192269A (en) * | 1991-07-24 | 1993-03-09 | Abbott Laboratories | Multi-valve manifold for drug infusion systems |
| US5392769A (en) * | 1992-10-06 | 1995-02-28 | Vinatroics Division | One-way valve |
| US5253670A (en) * | 1992-12-14 | 1993-10-19 | C. H. Perrott, Inc. | Multiple drain trap primer valve assembly for sewer lines |
| US5480030A (en) * | 1993-12-15 | 1996-01-02 | New West Products, Inc. | Reusable, evacuable enclosure for storage of clothing and the like |
| US6408872B1 (en) | 1993-12-15 | 2002-06-25 | New West Products, Inc. | Evacuable container having one-way valve with filter element |
| EP0734345B1 (en) * | 1993-12-15 | 1999-11-10 | New West Products, Inc. | One-way valve and reusable-evacuable enclosure |
| US5640991A (en) * | 1995-03-24 | 1997-06-24 | Tom King Harmony Products, Inc. | Siphon freeze drain valve for underground irrigation systems |
| US5564457A (en) * | 1995-06-05 | 1996-10-15 | G & H Products Corp. | Vacuum breaker valve with CIP capability |
| CN1107182C (en) * | 1996-07-19 | 2003-04-30 | 罗伯特·B·查飞 | Valve for inflatable objects |
| US6161564A (en) * | 1999-04-06 | 2000-12-19 | Cornwall; Kenneth R. | Fire transmission prevention system |
| US6267473B1 (en) * | 1999-04-30 | 2001-07-31 | Hewlett-Packard Company | Check valve in an ink pump for an ink-jet printer |
| US6273124B1 (en) | 1999-05-26 | 2001-08-14 | Donald G. Huber | Check valve floor drain |
| US6202849B1 (en) | 1999-07-07 | 2001-03-20 | David B. Graham | Evacuatable rigid storage unit for storing compressible articles therein |
| US6293229B1 (en) | 2000-04-18 | 2001-09-25 | Edstrom Industries, Inc. | Cage flood prevention system |
| JP2004519356A (en) | 2001-02-21 | 2004-07-02 | イ、ゴルジュ | Method for producing vacuum packaging film having flow path |
| US6719004B2 (en) | 2001-06-19 | 2004-04-13 | Donald G. Huber | Check valve floor drain |
| US7478448B2 (en) | 2001-08-01 | 2009-01-20 | Aero Products International, Inc. | Inflatable reinforcing chamber |
| US6701559B2 (en) | 2001-08-01 | 2004-03-09 | Aero Products International, Inc. | Increased height inflatable support system |
| EP1562459B1 (en) | 2002-11-18 | 2007-06-06 | CHAFFEE, Robert B. | Inflatable device |
| US7138025B2 (en) | 2003-03-05 | 2006-11-21 | Tilia International, Inc. | Method for manufacturing a sealable bag having an integrated tray for use in vacuum packaging |
| US7087130B2 (en) | 2003-03-05 | 2006-08-08 | Tilia International, Inc. | Method for manufacturing a sealable bag having an integrated zipper for use in vacuum packaging |
| US20050034806A1 (en) | 2003-03-05 | 2005-02-17 | Tilia International, Inc. | Method for manufacturing liquid-trapping bag for use in vacuum packaging |
| US7517484B2 (en) | 2003-03-24 | 2009-04-14 | Sunbeam Products, Inc. | Forming evacuation channels during single and multi-layer extrusion process |
| US7220053B2 (en) | 2003-12-16 | 2007-05-22 | Sunbeam Products, Inc. | Flexible composite bag for vacuum sealing |
| TWM249978U (en) * | 2004-01-20 | 2004-11-11 | Den-Lu Hung | Diaphragm type drain head |
| US7534039B2 (en) | 2004-07-22 | 2009-05-19 | Sunbeam Products, Inc. | Vacuum packaging films patterned with protruding cavernous structures |
| JP2006044660A (en) * | 2004-07-30 | 2006-02-16 | Katsutoshi Masuda | Fluid storage container |
| CA2583171C (en) * | 2004-10-08 | 2013-09-10 | Robert B. Chaffee | Methods and apparatus for controlling air in inflatable devices |
| US7237572B2 (en) | 2004-10-29 | 2007-07-03 | Hewlett-Packard Development Company, L.P. | Check valve |
| WO2006049712A1 (en) * | 2004-10-27 | 2006-05-11 | Hewlett-Packard Development Company, L.P. | Check valve |
| US7395835B1 (en) | 2005-02-16 | 2008-07-08 | Rectorseal Corporation | Air admittance valve |
| EP2001341A2 (en) | 2006-04-04 | 2008-12-17 | Robert B. Chaffee | Method and apparatus for monitoring and controlling pressure in an inflatable device |
| US7886412B2 (en) | 2007-03-16 | 2011-02-15 | S.C. Johnson Home Storage, Inc. | Pouch and airtight resealable closure mechanism therefor |
| US7784160B2 (en) | 2007-03-16 | 2010-08-31 | S.C. Johnson & Son, Inc. | Pouch and airtight resealable closure mechanism therefor |
| US7946766B2 (en) | 2007-06-15 | 2011-05-24 | S.C. Johnson & Son, Inc. | Offset closure mechanism for a reclosable pouch |
| US7874731B2 (en) | 2007-06-15 | 2011-01-25 | S.C. Johnson Home Storage, Inc. | Valve for a recloseable container |
| US7857515B2 (en) | 2007-06-15 | 2010-12-28 | S.C. Johnson Home Storage, Inc. | Airtight closure mechanism for a reclosable pouch |
| US7967509B2 (en) | 2007-06-15 | 2011-06-28 | S.C. Johnson & Son, Inc. | Pouch with a valve |
| US7887238B2 (en) | 2007-06-15 | 2011-02-15 | S.C. Johnson Home Storage, Inc. | Flow channels for a pouch |
| CN102099758B (en) | 2008-03-13 | 2013-09-11 | 罗伯特·B·查飞 | Method and apparatus for monitoring and controlling pressure in an inflatable device |
| MX2011011707A (en) * | 2009-05-05 | 2012-05-29 | Liquidbreaker Llc | Drain cartridge having removable valved system. |
| US9139991B2 (en) | 2011-01-31 | 2015-09-22 | The Rectorseal Corporation | Floor drain valve with resiliently mounted rigid flappers |
| KR101378369B1 (en) * | 2011-06-14 | 2014-03-27 | (주)연우 | Pumping type cosmetic vessel |
| US20130025637A1 (en) * | 2011-07-28 | 2013-01-31 | Electrolux Home Products, Inc. | Siphon break apparatus configured to prevent a siphon effect in a fluid conduit of a dishwasher and an associated method |
| WO2014022782A1 (en) | 2012-08-03 | 2014-02-06 | Chaffee Robert B | Self-sealing valve |
| US9416986B2 (en) | 2013-06-24 | 2016-08-16 | The Rectorseal Corporation | Valve for roof vent |
| US9010363B2 (en) | 2013-06-24 | 2015-04-21 | The Rectorseal Corporation | Drain valve |
| US9194507B2 (en) * | 2013-06-27 | 2015-11-24 | Bermad Cs Ltd. | Air release valve with elastic rolling shutter |
| US11142896B2 (en) * | 2019-04-15 | 2021-10-12 | Prier Products, Inc. | Flow turbulence reducer |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US30849A (en) * | 1860-12-04 | Improvement in plows | ||
| US1755993A (en) * | 1926-08-16 | 1930-04-22 | William C Groeniger | Water-supply system |
| US2115499A (en) * | 1936-06-26 | 1938-04-26 | Riccardo Salmona | Protective device for systems of water supply |
| US2259984A (en) * | 1940-01-31 | 1941-10-21 | Dwight M Anderson | Vacuum breaking valve |
| US2405639A (en) * | 1944-02-19 | 1946-08-13 | Edward W N Boosey | Vacuum breaker |
| US2502211A (en) * | 1948-06-19 | 1950-03-28 | Easy Washing Machine Corp | Vacuum breaker |
| US2686528A (en) * | 1950-02-06 | 1954-08-17 | Backflow Engineering & Equipme | Fluid pressure trip controlled vacuum breaker |
| US2777464A (en) * | 1951-03-07 | 1957-01-15 | Detroit Controls Corp | Flow control devices |
| US2738798A (en) * | 1953-12-14 | 1956-03-20 | Wrightway Engineering Co | Vacuum breaker |
| US3145724A (en) * | 1960-11-14 | 1964-08-25 | Harry Karp | Vacuum breaking device |
| US4022244A (en) * | 1973-12-14 | 1977-05-10 | Oman William S | Irrigation purge valve |
| US4508136A (en) * | 1982-09-29 | 1985-04-02 | Kah Jr Carl L C | Anti-syphon flow control valve |
-
1987
- 1987-04-23 US US06/041,401 patent/US4712574A/en not_active Expired - Lifetime
- 1987-07-22 CA CA000542641A patent/CA1278975C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US4712574A (en) | 1987-12-15 |
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| Date | Code | Title | Description |
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