US1797209A - Spraying appliance - Google Patents

Description

March 17, 1931. s. BRAMsEN ET AL 1,797,209

SPRAYING APPLIANCE Original Filed Feb. 27, 1928 3 Sheets-Sheet l March 17, 1931. l 5 BRAMSEN ET AL 1,797,209

SPRAYING APPLIANCE Original Filed Feb. 27, 1928 I5 Sheets-Shet 2 Matth 17, 1931. 5 BRAMSEN ET AL, l y1,797,209

SPRAYING APPLIANCI: l

Original Filedk'eb. 27, 1928 3 Sheets-Sheet 3 Patented vMar.. 17, 1931 UNITEDv STATES PATENT oFFlcE svEND BRAMSEN AND WILLIAM nnnsLnB, or cnrcaco, ILLINoIs i SPBAYING APPLIANCE Refiled for abandoned application Serial No.. 25-7,391 filed February 27, 1928. This application med January 20, 1930.

This application is a continuation and refiling of our application No. 257,391, iiled February'27 th, 1928 on a spraying appliance.

Our invention relates to spraying appliances and in some of its general objects aims to provide a better balancing of manually held spraying appliances, a novel and unitary arrangement of the air control valves, novel means for sealing the valve body to the air 1o ducts, a detachable assembly permitting the ready removal of the air valve assembly, a

novel lever arrangement for actuating the main air valve, and a novel barrel vconstruction.

invention includes the following objects:

(1) To provide air controlling means diS- l posed so, as to counterbalance theliead-of a spray gun, whereby the entire appliance will 2 be approximately balanced in the users hand. y

(2) To provide means suitable for sepa-- rately controlling the supply of air to a plurality of ducts and to have these air control means detachable as a unit from a body mem- .ber ofthe appliance. Y

, (3) To provide air controlling means in which the valve` body is retained in operative position of the assembling of the tubular handle of the spray appliance.

(4) To provide simple and readily releasable means 'for securing such a valve body in sealing' relation to the corresponding air ducts within the handle ofthe appliance.

(5) To provide air control means in which a manually operable member controls the entire admitted air while separately adjust.-

to'dierent air ducts;

y (6). To provide an air-proportioning arrangement for this purpose in which one of the proportioning members is mounted on another one, and in which the entire valve mechanism is detachable as a unit from the vbody of the appliance. (7) To provide a handle construction designed or preventing contact of the users hand with the air control means.

In some of its more particular aspects, our

able members proportion the admitted air Serial No. 422,240.

(12) To provide a spray-gun barrel construct-non which will combine ease of manufacture with'unusual lightness.

Stillfurther and also more detailed objects will appear from the' following specification and from the accompanying drawings, in which f Fig. lis a central, vertical and longitudinal section through a spray gun embodying l our invention, with the main air control valve in its closure position.

tween the valve body and the,A barrel of the spray gun.

Fig. 8 is a perspective view of the connectin-g lever which is interposed between the stem of the main air control valve and-the actuating lever (or trigger) of the spray gun. y

Fig. 9 is a front elevation of the lower end portion of the spray gun, and Fig. 10 is a side elevation' of the same.

Fig. 11 is a bottom view of thel handle end of thespray gun.

Fig. 12 is an enlarged transverse section Fig. 4 is a section similar to a part of Fig. 2 is an enlargement of the lower lpor-v i taken through vthe handle along the line 12-12 of Fig. 1.

Fig. 13 is an 'enlarged central and lon tudinal section through' the barrel 'of t e f spray gun before other partszare attached to the same.

Figs. 14 and v15 are enlarged sections, taken l respectively along the lines 14-14 and 15-15 groove in the barrel, as shown in Fig. 3.

Extending through the barrel or body member 1 and generally longitudinal of the same are three passages; namely, a liquid passage 4 towhich paint or other liquid is supplied through a liquid inlet 5 and which' passage terminates at the forward end of the gun in a liquid discharge port 6; amain air passage 7 leading to an/ annular air port 8 concentric with the said port 6 and through which a sheath of air is projected around the discharged stream of liquid; and a supplemental air passage 9 connected by an annular air chamber 10 and grooves 11 with forwardan annular shoulder within a ly converging air (ports 12 through which air Jets are pro3ecte from the gun.

The air passages 7 and 9 both have inlets facing the bore of the hollow handle and respectively open to the upper ends of two air supply tubes 13 and 14, which tubes extenddownwardly withinv the handle. Mounted within the lower end ofthe handle isa substantial T-shaped valve body (shown separately in Fig. 6) comprising an approxif` mately horizontal tubular body portion 15, an upwardlyextending tubular shank 16 within whichjthe stem 17 of the main `air valve is slidable, and a downwardly directed inlet 18. This inlet 18 houses both the vhead for liattening the spray 19 on the valve stem 17 and a spring 20 continuously pressing the head toward a seat21, and the .spring abuts at its lower end against dtachable nipple 22. s i

This nipple is Vthreaded at its lower end. for attaching the usual hose through which compressed air issup'plied to the spray gun,

and the nipple has its upper portion radially enlarged into a polygonal head23 fitting a corresponding shape of the lower ends of the handle parts 2, as shown in. Fig. 10. These handle halves are also curved toward each other as shown in Fig. 9, so as to underhang the horizontal tubular portion 15 of the menace valve body, and the intertitting of these handle parts with the nipple end 23 prevents the nipple from unscrewing when a hoseis being detached from it.

The lower ends of the handle parts also have recesses for respectively receiving the head 24 and the polygonal body 25 of a nut carrying a screw 26 which presses the valve body upwards so as to clamp the air tubes 13 and 14 tightly between the valve body and the gun barrel 1, and the handle recess portions adjacent to the polygonal body 25 fit this 'to hold it against rotation. The air tubes 13 and 14 are connected respectively by ports 28 and 27 to the bore 29 of the horizontal tubular portion of the valve body, which bore is connected at its rear end to an air chamber 32 above the seat for the valve head 19.

Threaded into the horizontal valve body bore 29 is a tubular valve member 30 which presents a head 31 outside the handleand which has itsrear en d slidable past the lnlet to the port 28 so as to control the connection between .that port and the air chamber 32. Threaded into the tubular vavle member 30 is an auxiliary control member 33 which can be rc tated by a head 34 disposed in front of the head 31. This auxiliary control member 33 has a bore 35 opening at its rear end to the bore 29 through which air is supplied to the tube 13, and this bore 35 opens through a lateral portA 36 into an annular chamber 37 between a shoulder on this auxiliary control member 33 and a shoulder in the bore 35 of the control member 30.

The annular chamber 37 is connected by a radial port 38 in the valve member 30 to an annular'enlargement 39 in the bore 29 of the valve body, from which annular chamber the port 27 leads to the air tube 14, thereby connecting the air tube 14 with the bore of the control member 33 regardless of vthc rotational position of the ylatter member whenever that member is suiciently retracted to open the radial port 39.

To move the head 19 of the main air valve away from its closure seat against the pressure' of the spring 20, we interpose a connecting lever between the stem of that valve and the usually trigger-shaped actuating lever 40, which actuating lever or trigger is connected in any customary manner to the needle valve 41 controlling the discharge of liquid through the liquid outlet 6. Since this trigger 40 is preferably in front of the handle vwhile the main valve stem 17 is behind the vone handle side and both air tubes, and we preferably have. portions of the lever extending at opposite sides of the tubes to afford spaced bearings for the lever. For this en .tu

. A metal of the, lever keeps its bearing portions I 5 forwardly through an opening in the handle to dispose this bight for engaging the trigger-shaped actuating lever; 40.

The main portions of the connecting lever extend downwardly within the handle at op- 10 posite sides of both ofthe air tubes to present spaced bearings 41 fitting over journaling means associated with the two handle halves, which handle halves also are 'clamped together by -two vertically spaced screws 45 and 46. For this'journalin we preferably provide each handle hal 2 with an inwardly projecting stem 50 on which one of the lever bearings 41 journals, and an adjacent bossl against which the ,correspondingbearing end of the lever is pressed b the resiliency of lever. With the journa ing stems 5'0 dis# posed in axial alinement and extending be-4 tween the two airrtubes (as shown in Fig. 12) andthe lever formed so that its resiliency tends to spread its bearing portions farther apart than the'bosses 51, the assembling of the handle halves with the lever between them e'ects the desired pivotal` connection of the lever to the .handl and the resiliency of the spread apart to prevent rattling and to keep l' the shanks of the longitudinally V-sectioned level freely spaced from the air tubes 13 and 14.- Extending beyond the bearing 41 from at least ne yof the arms 43 of the connecting lever and transversely of the valve stem 17, the lever has another arm 47 presentingh its free end above and in engagement with the free upper end of that valve stem.l

With o ur spray gun thus constructed, a rearward movement of the actuating lever (trigger) 40 rocks `the yhell-crank lever and Y depresses the main air valve stem 17 so` asto open that valve and permit air to enter both the air chamber 32 and the bore 35 of the auxiliary control member. rll`his air is then proportioned between the air pipes 13 and 14 accordihg to the positions of thel main control member 30 with respect to the valve body, and. also according to the position of the auxiliary controlv member 33 `with respect to the said main control member, while the total admission of 'air to (the tubes 13 andl 14 depends on thetotals of the areas of the ports 28 and 38 which are open.

- il; lFor example, itthe auxiliary control member is un'screwed from its position ofFig. 1 A' tdaford an opened area of the port 38 cor- 50 respondingto the area left open inl the port 28 by the inner end of the main control member-30, the air willbe equally divided bes tween the tubes1 13 and 14; whereas a relative change in these opened port areas will effect a correspondingly changed proportion in the air supply to these tubes, and through the two tu es respectively to the annular air sheath outlet 8 and the auxiliary air jet ports 12. Likewise, by screwing the auxiliary controlY member 33 inwardly to close the port 27 entirely, the supply of air to the auxiliary air ports 12 can be shut y0H completely when the spray gun is to be used for projecting an unflattened spray.

With such a spray gun employedfor a flat spray, the auxiliary valvemember can be initially screwed back to shut 0E the supply for the spray-flattening supplemental -air jets, while the main control member 30 is adjusted to admit air in suitable quantityand pressure for the air sheath around the projected liq uid, in proportion to the pressure at which liquid is fed to the gun and also to the intended spread of.. the spray. rlhen the aux'- iliary control member 33 is unscrewed suiciently for causing air through the auxiliary air outlets 12 to flatten the spray, and if necessary the position f the main control member 33 can bereadjusted. By proceeding in 1 some such'manner, the user can readily adjust our valve arrangement with a high degrec 'of accuracy for securing both the desired total projection of air and the eective proportioning of the quantity and velocity of the air whichfissues respectively from the annular outlet 8 and from the auxiliary air ber 32 is preferably much larger in eli'ective section than the joint areas of the ports4 27 and 28. The once established positioning of the two control members then definitely determines the amount of air ,fed to each ofthe air tubes 13 and 14, and the adjusted proportioningis not affected by the opening or closing of the main air valve. To prevent the hand of the user from contacting with the heads 31 and 34 of the two control valves during the use of the spray gun, we preferably provide each handle half with a projection 52 overhanging these valve heads.

By having the main valve stem extending vertically within the handle, 'we can provide a much longer bearing for it than has been possible with the customary constructions in which this valve stem'was disposed substan tially horizontally in the handle, since the width of the handle needs to be qfuite limited to make it it a human hand. By merely llO clamping the air tubes 13 and 14 (at least at one end) against one of the parts connected by these tubes, we greatly facilitate the cleaning of the tubes if this should be required. And by employing a single-piece valve body we expedite its manufacture. So also, by mounting one control member within the other, we provide an unusually compact double controlarrangement.

Moreover, by mounting the valve arrangement in the lower end of the handle we cause the valve assembly to counterbalance the weight of the headof the spray gun, so that ,the complete appliance is approximately balanced about its neck portion and hence fatignes the user less during its manipulation than the usual type of spray gun in which the valves are mounted close in to the barrel or in the barrel itself.

So also, by employing a main air valve disposed behind theair tubes in the handle and near the lower end of the handle, we can make the forward arm 43 of the valve-operating lever much longer than the lever arm 47 which engages the stem of the valve, thereby securing suoli a leverage as to reduce the digital pressure required on the trigger in proportion to a given strength of theV valve spring 20.

With the valve-actuating lever made of resilient metal and initially formed'as shown inFig. 8, and with alined journaling stems.

50 formed on the two handle halves (which desirably are die-cast), I facilitate the mounting of the lever in the handle, as no screw needs to be fished through the journaling bearings of the lever. Moreover, the spaced bearings forthis lever prevent any undesirable rocking' and also permit the main portions of the lever to be freely spaced both from the air tubes and from the bore of the handle. y

To facilitate the machinin of the-barrel of our spray gun vand to make t is barrel lighterV l than it would be if all of the needed passages' were cast in it, we preferably employ the construction shown on an enlarged scale in Figs. 13,14'and 15. ln this construction, the gun barrel casting (which desirably is die-cast of aluminum) has the forward portions of the passages 7 and 9 cored in the forward end of the barrel and vleading from the bore of the main (medial)V barrel'portion, and also has the inlet portions 7B and 9B of the saidV assagesleading to `this -bore fromthe necli:v .of the barrel casting. This medial main bore portion initially consists of a simple tube of generally circular transverse section, provided with inwardly directed ins 52 extending longitudinally from opposite sides of the said tube 1, as shown in Fig. 14, the opposed memos tively large and downwardly 4directed liquid inlet bore 57 in the head ortion 55 of the gun barrel casting and sol er a liner tube 58 into this bore 57, which liner tube has an annular groove 59 disposed for connectinrr the parts of the passage 9 which are forward and rearward of the said bore 57. This liner tube arrangement permits our forming the passages 57 and 9 by cores which intersect and support each other, while the use of the inserted guide tube 54 permits both this tube and the surrounding barrel portion 1 to be of quite thin metal, so that we secure an unusually light barrel construction in which the fins 52 cooperate with .the guide tube 54 to Yafford passage portions 7 and 9 of arcuate transverse section respectively above .and below the said tins, which passa e portions can bey quite narrow radially'of t e barrel. f

We also core out the barrel casting so as to leave an annular passage 60 connecting the medial part of the air passage 7 with the inlet portion 7 B of this passa e, and for this purpose leave the rear ends o the fins 52 connected by a lower arcuate casting portion in the form of a web 61, which has its upper end soldered to the guide tube 54 and which forms a partition between the annular pas-A the spirit of our invention or rom the appended claims, and we also do not wish to be limited to the use of. the various novel features of our invention in conjunction with one another.

.spray head and having at its rear end a downwardly directed neck, a hollow handle comprisinga pair of handle halves interlocked at the1r "upper ends with the said neck, a valve body mounted in and having its major portion jointly housed by the handle halves, and releasable means for drawing the handle halves toward each. other to clamp them against the neck and to cause the lower handle portions to retain the valve body therein.

2. A spray appliance construction as per claim 1 in which the neck and the valve body each have two socket formations respectively entered by end portions ofthe two tubes.

3. A spray appliance construction as per claim 1, in which the said releasable means in combination with lever journalingmeans carried by and extending transversely of the handle, anda lever pivoted on the journaling means.

4. A spray appliance including a body member providedat itsv forward end with a. spray head and having at its rear end a downwardly directed neck, having two separate air passages leading from the lower endof the neck to thespray head; a hollow handle secured at its upper end tol the neck, a plural valve assembly mounted in the lower end of the handle, and' two air tubes housed by the handle and connecting the valve assembly respectively with the said air passages. f

5. A spray appliance as per claim 4, in combination with means interposed between the'handle and the valve assembly for pressing thelatter toward the said neck to clamp the air tubes therebetween.

6.,A spray appliance as per claim 4, in which the valve assembly includes a valve controlling the supply of air for both air tubes, and means for opening the said valve, the valve opening means including a lever straddling both air tubes.

7 A spray appliance as per claim 4, in

which the valve assembly includes a valve controlling the/total supply of air for both air tubes, `the said valve having a stem extending upwardly within the handle, and a lever pivoted in the handle and having one arm disposed for moving the valve stem, the

lever having anotherarm projecting through a frontal portion of the handle.

8. A spray appliance as per claim 4, in wliich the valve assembly includes a main air valve having an upwardly directed valve stem behind the two air tubes, anda two control means respectively controlling the admission of air to the `two tubes; in combination with a bell-crank lever pivoted within the handle and having one lever arm disposed for moving the said valve stem, the other arm of the lever projecting forwardly through the handle. 9. ln a spraying appliance, a hollow handle, a pair of air supply' tubes mounted in the handle, and two valve members respectively controlling the admission of air to thetwotubes, each valve member having a digitally movable portion disposed outside the handle, the handle having` a projection adjacent to the said digitally movable portions to prevent contacting of the latter with the hand holding the handle.

l0. ln av spray appliance having a hollow handle and an air control-valve mounted in the handle, and having an air supply pipe extending longitudinally within the handle, a valve-operating lever formed of metal doubled upon itself to form two-Shanks connected by la bight projecting forwardly the body member section;

throughthe lever and having the two shanks disposed'within the handle at opposite sides of the pipe, and pivoting means within the handleand extending through both Shanks ofthe lever, one shank of the lever bein continued beyond' the pivot-ing means an disposed foractuating the aircontrol valve.

11. A spray appliance construction as per claim 10, in` combination with an operating lever outside the handle 'and disposed for 'engaging thg bight of the said valve actu-v ating lever. f

12. In a spray ap liance, a hollow handle comprising two han le halves, a valve mounted in the handle, and avlongitudinally V- sectioned valve-operating lever formed of'a metal strip doubled upon itself to form two shanks and having alined journaling per-orations in its Shanks spaced from its bight, each handle'half having a journaling stem extending` inwardly of the 'handle through Y one of the journaling perfor'atins.

13. A handleand lever construction for a spray appliance the lever is made of resilient metal and fox-'med so that its resiliency tends to spread the perforated lever shank portions further apart than the outer endsof the journaling stems. l

14. In a spray gun, a barrel, a hollow handle extending secured at its upper end tothe barrel, air control means mounted on the lower end of the handle and ihcludingavalve stem extending upwardly within the handle, two air tubes disposed within the handle forward of the said stem and connecting the air control means with the barrel, the said tubes being forwardly spaced from each other, and means upon the handle and extending between the tubes for pivotally connecting the lever to the handle.

15. 1n a spray gun, a barrel, a hollow ,han-

dlegextending downwardly from the barrel `Aand having a frontal aperture, an actuating lever extending in front of the aperture, a1r control means including a'valve stem extendas per claim 12, in which'.

ing within the handle, and avalve-actuating lever of substantially V-shaped longitudinal tending within and 'pivotally connected to the handle anda bight connecting the two Shanks and projecting through the saidaperture for engagement by the actuating lever.

' 16. In a spray gun, ahollow handle having a frontal aperture, an air valve carried by the handle and having a valve stem extending upwardly within the handle, and a valve-actuating lever comprising two spaced Shanks ex-- tending through the said aperture and connected outside the handle by a bight, the main the lever including two Shanks ex- .115

iso'

50 respectively forward an 6 s v menace lar medial portion and having longitudinal fins projecting inwardly from opposite sides of the said medial portion, and a tube disposed within the barrel and sealed to both ins to alford two spaced longitudinal air passages. Y

18. In a spray gun, a barrel having a tubular medial portion and having longitudinal ins projecting inwardly from o posite sides 10 of the said medial portion, an a tube disosed within the barrel and sealed to both Ens to aiord two spaced longitudinal air passages, the opposed inner' edges of the two fins having counterpart arcuate transverse sections, and a tube corresponding in outside diameter to the said arcuate sections and extending longitudinally between and sealed to both fins.

19. A spray gun barrel construction including a barrel casting having two inwardly projecting longitudinal ins spaced circumferen- -tially of the barrel, and a tube extending between and sealed to both fins, the Iins cooperatinor with the tube and the bore of the barrel 'to aord two separate air pasages of arcuate transversed section.

20. A spray 'gun barrel construction as per claim 19, lncludin an arcuate web closing the rear end of one o the said separate air pas- 3o sages, the barrel being formed to provide an angular passage rearwardly spaced from the first of the said separate passages and connected to the second of the said separated passages, and the 'barrel having two inlet passages respectively leading to the .said rst passage and the said annular space.

' 2l, The combination with a generally tubular spray gun barrel aording a central tube extending between two separated air passages 40 and having a forward end portion through which both passages extend and within which the tubes terminates, the said end portion having a transverse bore intersecting one of the said passages and terminating forwardly of the tube, of a liner tube inserted in and sealed to the said bore and having a peripheral groove opposite the last named passages to afford an annular passageway connecting the parts of the last named assage which are d) rearward of the liner tube.

Signed at Chicago, Illinois, January 15th, 1930.

SVEND BRAMSEN. WILLIAM HERSLEB.

CERTIFICATE OF CORRECTION. Patent No. 1,79%,209c March 17, 1951.

SVEND BRAMSEN, ET AL. v

It is hereby certified that the above numbered patent was erroneously issuedto the inventors, Svend -Bramsen and william Hers1eb,' whereas said patent should have been issued to --Binks Manufacturing Company, of Chicago,A Illinois, a corporation of Delaware', as assignee by mesne assignments", as shown by the record @Assignments in'this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of' the case in the Patent Office.

Signed and sealed this 18th day of August, A; D. 1914.2.

Henry Van Arsdale,

(Seal) l Acting Commissioner of Patents.

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