US1812922A - Touch-up spray gun - Google Patents

Description

July 7., 1931 s. BRAMSEN ET AL 1,812,922

TOUCH-UP SPRAY GUN Filed Nov. 9, 1929 Patented July 7, 1931 Y* UNITED sra'ras .earsa'r orifice SVEND BRAMSEN VAND- WILLIA'MI HER-SLEB, OF CHICAGO, ILLINOIS, ASSIGNORS TO BINKS MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS,y A CORPORATION OF DELAWARE TOUCH-UP SPRAY GUN Application :'led November OurV invention relates to spraying appliances of the class in which the supply of Y both the liquid and the air is controlled by a single lever, which lever usually'is dis- 5 posedv for opening the air supply in advance of the liquid supply, such spray appliances being commonly marketed inftypes known as spray guns. In such spray guns, the control lever usually extends across and straddles the stem of the needle valve which controls the dischargev of the liquid, and this .lever also extends in front of the stem of the air valve. l

Sinee'these spray guns, together with part of the weight of theair supply hose and of the liquid-supplyihose (or even the entire liquid container)v are usually supported by a single hand of the user, it is important that the weight of the spray gun be minimized as much as will be feasible with due allowance Consequently, it is new customary to em-V ploy a' spray gun body havinga frame-like portion across which thestem of the needle valve extends longitudinally, and to have the trigger straddle this frame portion transversely of the needle valve stem.

It Vis also customary to4 guide the liquidcontrolling vneedle valve stem partly by a guide member which extends rearwardly into this frame in front of the actuating lever, to have the lever continuously urged forwardly (or away from its valveeopening position) by a spring-pressed plunger extending forwardly into the frame behind the lever, and to have the stem of theI air valve project forwardly also into the interior of the said body frame. v

' However, since thebody of the spray gun also requires at least one of the longitudinal 'members of the frame to have a bore through which one of the 'iiuids (such'fas the air) passes toward the spray head, tlie'levcr arms straddling this frame must be spaced at such a distance at opposite sides of the two valve stems that neither of thesestems can be directly engaged by either one of the twin arms of the lever for actuating the valves. Furthermore, it is desirable to are0 range the spray gun vso that both ofthe for strength and durability.

9, 1929. Serial No. 405,979.

valve stems can be bodily withdrawn rearwardly from the body of the gun when the latter is to be cleaned, or when these stems are suiiiciently worn to require their replacing; hence it is not feasible in practice to provide either of the valve stems with a head or cross-bar spanning the twin arms of the actuating lever (behind these arms) for transmitting the thrust of the lever.

Neither has it been found desirable to construct the lever with separable arms connected by bolts or the like, since this involves an undesirable number of parts and leads both to looseness, rattling and variations in adjustment; and since such a separable lever arm construction also increases the time required for vdetaching and replacing the lever whenever it is necessary to detach the forward needle valve guide and the packing for the latter.

Furthermore, the usual spray gun constructions involve undesirably heavy fastenings for connecting the gun handle to the gun body, together with undesirably large fastening elements for this purpose.

In some of its general objects, our invention aims to overcome the above recited difficulties and objections, as encountered with the spray guns heretofore employed.

Mere particularly, our invention aims to provide a spray appliance construction of ltherecitcd class, in which the twin arms of the valve actuating level' are formed integral with the handle or trigger of the lever, in which an auxiliary thrust member disposed between the two lever arms transmits the thrust Vofthe lever to both of the valve stems without interfering with the adjustment of the valves, and in which a single fastening member suilices for supporting the thrust member upon the lever and cooperates with the aforesaid spring plunger for retaining this thrust member in operative position.

Moreover, our invention aims to provide a construction for this purpose in which no additional space and no material addition in weight is required for the just received novel arrangement, and in which beth the said actuating lever and thrust member can gun, will 'ins-ure 'a yrigid connecting of these parts by means `of a single vscrew Y and which will permit the use of an -unusually light handle.y Moreover, vourinvention time to provide 3.-

astruaieil aadiernangenient lor this ypurpose which will "be 'inexpensive, highly compact, and easily manufactured.

Still further and more ydetailed `objects of our invention will appear romthe'following-specification and trom fthe accompanying drawings, in 'which fF-ig. 1 is a l-yiie-w :off a lspray -giin and @paint cugp outfit 'embodying Our Nirrveirtio'ii,. with thelOWer portion 'off the paiiitcup :and :a .part-oi :the .handle broken away, with the Sp rayfgu'n ",-partly :in side elevation VYand partlygin central, vent-ical .and longitudinal section.

Fifg. 2 :is van. enlargement o'fa portion of Fig r 3 is enlarged transverse section `:taken alongthe lfrne343 oit Fig. 1.

; Fig.1 -1.is, a horizontal section Ytal'ren through' -3 along the line l-4101: 'Fig'. :3.

the thrust member which is supported `by the said ileyer for transmitting the :actu-ating movement :to the 'ftiwo vvalue stems.

*Fig-f. 7 is 1a `nagmeri't'ary transverse section through adj acont portions :of the handle iai-ad body of the spraygun, taken along Ythe llifne of Eig. j

8 is laYperspe'ctiv'e vView-fof the-upper .portieri ofthe Tha1 del-ofthe splraygun.

.In 'the illus. l. er1-embodiment, i sho-wis the Iupper ipofrtiion 'of `a Vliquid contain- 'er .(i'or so ,calledtpailnt cup) y1 connected by suitable .flittings 2 to' 'fa nipple 3 extending :upwardly :into *a 'vertical :passage 4. bored .th-sneek 5 ofthe ibo-dy koi our spray appilla-nce.v rThis body includes :upper flonggi; :tudinal bar 'f5 and `a lower 'tube 7 both extending rearwardly from the neck F5' iin spaced relation y"andbotlh leadiingto the rea-r portion 816i the body, 'whereby the said aparts z5, :6, '-7 and -8 constitute 'an upright #trame 'The upper bar '6 desirabfly has inf -tegra'l withitf'a hook T9, lby vwhich fh'ok the appliance 3may be suspended lso 'that the weight of the appliance (inclue nthie weight oaf `ithe paint cupfand' its contents Eand ft-lie weight :of the .adjacent `air hose portion {10i} need Snot be suportedfby the usercf the ateliers@ which is cast integral with this body at the forward end of the neck, and against which head the air-conning collar 11 is clamped by the usual clamping ring 12. This forwardly tapering clamping ring holds Van ai=r Lnozzle 13 on fa liquid nozzle 514., the air nozzle the usual axial -air iport o1 larger diameter than the tip 5 of the liquid nozzle.

The "le B :has .a medial portion"D A "(Fig. 2') tiireadec'l into the ueck. and. has above this ,portion a shank 8 `B which abuts against'a shoulder 16 in the said neck below the axis 9 of ,the liquid nozzle. The liquid nozzle 14 is threaded into the forward end oifaffliqirid duet 17 forined Ywithinthe said hea'd'and neck and *leading 'to the bore of tliisfnozzle, and `this duct YiS connected by r boire 1:8 :2) totthebore o'ffthe stem "3 B ofthe le 3. This ystem 3 3B has vatleast fa .portion thereof `of smaller :diameter than .the upright `body 'bore 5 'in which tthe said stem `fis disposed, -so as to raffordan ,annular passage :around -the'stein to connect 'the bore 7 'A the lower 'and :longitudinal frame tube '7 with fa passage 19 Aopening through the t-ront :of the head tinto the interior of the air-confining collar 11.

'The rear bod-'y portion w8 vof our lajgipli'aiice thas 'a bore -151 A.. vwith the liquid duet `:17 and 'into which bore `'51A :a tubular adj 'member '20 is ythreaded :from fthe reario tliebody,'and this adjusting 'member Vpresents an enlarged .fliead 20 :A -behind the fb'ody for rotating/that member..y Thev ad# 'member 20 lis lin .-aXial alinement both, withfthe'fliquaid 'nozzle 14 and with/a "forward stern @guide 21 @which isthfreaded into )the :neck .'5 `troiifl the interior of the Jframe.

'This-stem guide as well fas the #rear 'bore :pontion off :the 'adjusting :member 'slidably it the stem l22 of .a needle Valve which extends intojtheboreoihe liquidnozzle and hasV at its 'iforlward end fthe usual tapering `tip adapit'edto close .theidischarge'port which eX- bore "7 A into the 'interior o1' 'the 'frame fbelow the needle 'via-Ive stem'a.

This can here 251mg its 'rforwaifd 'pe-mn seeming-eea 2e snails/tuve :cosy 2e,

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which valvenbody fits the bore 25, and yso as to afford 'an annular shoulder 29 engaged by the `juncture of the valve body with its stern.rv lThe lvalve. body has a bore 28 A at its rear end of the bore 26 ofthe tail and connected by a bottom port 30 to the bore 7 A of the air tube 7 which forms the bottom of saidfbody frame.

Extendingslidably through the bore of the stem 27 on the valve body into the opening of the frame belowrthe needle valve stem is the stem 31 of an air valve which has a head 32 fast on the air valve stem 31 behind the air valve body, this valve head 32 being formed so that it will close the rear end of the valve body bore 28 A when the said head is pressed forwardly by a spiralV compression spring 33. To effect this compression, we provide a hollow presser member 34 threaded into the rear portion of the tail 251and engaging the rear end of the spring 33, and we desirably provide Athe air valve also with a second stem 54 projecting rearwardly from the valve head 32 and extending into the bore of the spring to aid in centering the spring in the tail bore 26.

To actuate both the air valve and the needle valve stem 22 (which latter is the movable member controlling the supply of liquid lfrom the-liquid passage 17 to the usual discharge port of the liquid nozzle 14) we provide an varrangement including a valve actuating lever, which lever has twin lever arms 35 extending upwardly across the frame and a trigger 36 connecting the two lever arms below the bottom (air) tube 7. These lever arms extend at opposite sides of both the air duct 7 and the upper' bar 6 and are conjointly pivoted to this bar by a'bolt 37 which `is journaled in the said upper bar, the bolt having its head engaging the outer face of one lever arm (as shownin Fig. 3) and having outside the other lever arm both a nut 37 A and a locknut 37 B. v

Extending through the twin lever arms 35 below the needle valve stem is a pivot screw. 38'which has its head engaging the outer face of one lever arm and which has a. smaller diametered tip 38 A threaded both through `the other lever arm and through a loclrnut 39, as shown in Fig. 4. Pivot-ed on this pivot screw 38 and disposed between the two lever arms is a thrust member 40, shown separately in Fig. 6. A This ythrust, member has a perforation A through which the needle valve stem freely extends, the perforation desirably being flared forwardly to provide for ample clearance between its bore wall and the needle valve stem 22 in all positions of the actuating lever.

i Then we provide the lever with at least one stop disposed for engaging the 'thrust y member40 at a distancefromthe pivoting screw 30, and for this purpose desirably form each lever arm 35 with a stop lug 41 (Fig. 5) directed toward the companion lever arm and disposed above the pivot pin 38 for engaging the forward face of the upper portion of the thrust member.

The stem 31 of the air valve projects suiliciently into the frame to engage the thrust member 40 continuously, and the axis of this air valve stem passes somewhat above the axis of the pivoting screw 38, so that the forward pressure of the air valve stem (due -to the compression spring 33) continually tends to rock the thrust member upon this pivoting screw in a direction which would be counterclockwise in Figs. 1 and 2, thereby pressing the upper portion of the thrust member against the stop lugs 41 on the lever arms.

To actuate the liquid-controlling needle valve, we provide cup-like thrust sleeve disposed behind the said thrust member 40. This thrust sleeve comprises a tubeslidine' in the forward portion of the rear bore 51 into which the adjusting member 2O is threaded, and a perforated forward head 51, as all shown in Fig. 2. The needle valve stem 22 extends through this thrust sleeve and desirably fits the bore of the perforation in the head 51, and the thrust sleeve head 51 is soldered to such a portion of the needle valve stem that the said head will be spaced somewhat rearwardly from the thrust member 40 (as shown in Figs. 1 and 2) when the air valve is closed. Extending into the thrust sleeve and with its forward end engaging the head 51 of that sleeve is a compression spring 52 which has its rear end engaging the adjusting member 20; the latter preferably having a. forwardly open bore enlargement 20 B into which this spring extends, so as to center the spring.

To provide for the convenient manipulation of our appliance with a small amount of weight in addition to that of the heretofore described parts, we preferably provide a hollow and downwardly open handle 42 arranged so that it can be secured to the body of the appliance by a single screw 43. For this purpose, we provide the body of our appliance with a nub 44 extending downwardly from its rear frame member 8 below the tail 25, the lower face of this nub being provided with a groove 45, here shown as' extending lengthwise of the said body.

Then we provide the upper end of the hollow handle 42 with a top 46 wider than the width of the groove 45 and having an upward projection 47 corresponding in width to the groove and extending into the said groove after the manner of a tenon. With the handle 42 and the body nub 44 thus formed, the riser walls of the projection 47 engage the side walls of the groove 45 to prevent the handle from rotating about the A discontinued.

screw 43 which extends through a 'bore `-l8 in the said handle top and projection, so that this single screw (which is 'readilyirr serted through the open lower end of r`the handle) suliices tor securing the needed rigid connection -ofthe handle to the body. When lour 'appliance is not in use, the above described pressure of the spring 3131011 the air valve shutso-tl' the supply oair from the hose 'to 'the air valve -body 28 and also acts (through the valve stem Si) to hold the actuating lever at least as liar trward as is shown in Figs. l and Q. At the same time, Owing to "the also `described positioning of the thrust sleeve El() on -thexneedle valve stemjQQ, the spring 52 holds that stem in its liquid-dischargeelosi-ng position, with the thrust sleeve head 51 still spaced rearwardly from the thrust member 40.

0n rocking the {l'ever inv a -counterclock- .wise Ydirection about its 'pivoting bolt 87 (which is, readily done by a linger of the handgrasping the handle 42"), the air v-alve isopened frst,so as to cause air to be supplied at vone to the air passages in the air nozzle. 'Heweven Iliquid is "not'admitted to tliedisch'arge port iof 'the liquid nozzle until the lever has rotated'su-fliciently in the said direction so that 'the thrust member 40 also 'engages the'head lei" the thrust sleeve fastened' to thev needle valve stem. Consequent-ly, airis always projected iirst trom our appliance before the projection of liquid begins; and likewise the liquid -is shut cit in advance of the lai-r when the spraying is At the same time, the rate at which the liquid is supplied during the retracting of the yneedle Vvalve lstem can quickly be adjusted atany time by screwing the adjusting member 20 either forwardly or rearwardly. n

Hence we secure the needed adjustment with a simple and easily assembled lever and thrust element-arrangement, and one whichvdoes not interfere with va tightening of :the packing cap 24. This `"cap also is disposed for engaging the thrustmember to limit the forward swinginglof the actuating lever, which swinging can dono harm since it Vleaves both the liquid and air kshut off-g soth'at we can leave free play -i'or the "llev'er, since :any needed compensation 'lior irregularities in the .man-ulacture vcan `be secured bymerely'turn-ing thev'adjusting member 20.

By lemploy-ing anactuating lever withinfte'gral arms, we insure the rigidity 'of this lever, and we only Lrequire such afspread of theslever arms 1as will freely .clear the 'fair duct 7 which forms the lower'fl'rame member permitting the ffer-i'vard-stem.guide "2 fte rail-ages be detached alsoit desired. fHcwefver, the lever .and l-thrust member assembly need not 4be detached vfor removingor `replacing the needle valve, since the latter extends freely through the thrust member. i

Our single screw lhandle 'fastening lalso leXped'ites the assembling, and the use Yof -a downwardly open handle permits -t o lighten the handle, so ythat lou-r .entire appliance can be considerably lighter than the types heretofore in use.

However, while we have illustrated and described our invention in an embodiment including numerous Vdesirable details of'construction and arrangement, we do lnot wish f to -be limi-ted in these respects, lsince many changes might be made without departing either from the spi-rit of our invention or from'the appended claims. Nor do we wish to be limited tothe conjoint use of 'the var-ious novel l:features of our invention.

lvlfeclai'm as our invention: Y l. In a spraying appliance, a body member, a liquid-controlling vneedleV valve and an a'irfvalve stem both slidably :supported by the bodygmember and bothlei'rtending forwardly of the body member, an actuating lever straddling the vbody member and v'presenting two arms at opposite 'sides of the body member and of the needle valve, 'means Afer pivot-ing tl similar ends of both lever arms to the body member on a commonlaxis, a radial enlargement 4last ion the needle valve, a second detachablev pivoting means extending through the two 'lever arms, a y'thrust member p'ivoted on the second pivoting means and disposedin front of-both the air valve stem and the said enlargement, a stop tast on one lever arm and disposed in `iront of the thrust memberjat -`a `distance from the axis of theseccnd `piveting means, 'and spring means continually pressing the Iair valve stem for-ward against the VV-thrust member to hold the thrust member against the said stop.

2. In a sprayingy appliance, a bodymem-V ber, a liquid-controlling needle valve andan Iair valve stem both rslidably 'supported by vthe body member and both extending forwardly of the bo'dymemb'er, an actuating lever straddling the body member and presenting twov arms lat opposite sides ot the body member and of the needlevalve, detachable means for pivoting the similar ends of both lever arms to the `body member on a common axis, a radial enlargementtast on the needle valve, a second detachable pivoting means spanning the two lever arms, a thrust member pivoted onA the 'second lpivoting means and disposed in front of both theair valve stem andthe said enlargement, two stops respectively tast'on `the two lever arms and extending toward each other in front of lthe thrust member, the stops being at distance flrem "the axis et ithe `secand against the thrust member to hold the thrust member against the said stops; the body member having a portion at the opposite l side of the needle valve from the first named pivoting means, which body portion is of less thickness than the clear spacing between the said stops.

3. In a liquid spraying appliance, a body member including a frame-like portion having upper and lower frame members extending longitudinally of the body, a lever including two arms extending upwardly at opposite sides of the said frame-like body portion, detachable means pivoting the two lever arms on a common axis transverse of the body member to the upper frame member, a thrust member disposed within the opening of the frame between the two lever arms and provided with an aperture, means detachably supporting the thrust member on the lever, a needle valve extending longitudinally of the body member through the aperture in the thrust member and slidably supported by the body member, the needle valve having a radial enlargement within the said frame and behind the thrust member, and an air valve stem slidably supported by the body member and extending forwardly into the frame opening with the forward end or' the stem engaging a rear face portion of the thrust member.

4. A liquid spraying appliance as per claim 3, including a compression spring operatively interposed between the said enlargement and a more rearward body portion, and means for adjusting the compression of the spring.

5. A liquid spraying appliance as per claim 3, including a compression spring operatively interposed between the said enlargement and a more rearward body portion, and means for adjusting the compression of the spring; the said spring, adjustin means, and the needle valve with its en argement being rearwardly removable from the body member.

6. A liquid spraying appliance as per claim 3, including a compression spring operatively interposed between the said enlargement and a more rearward body portion, and means for adjusting the compression of the spring;v the enlargement and the adjusting means being cupped toward each other to house portions of the spring.

Signed at Chicago, Illinois, November WILLIAM HERSLEB. SVEND BRAMSEN.

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