US2107726A - Spray gun - Google Patents

Description

Feb. 8, 1938. s. BRAMSEN ET A1. 2,107,726

SPRAY GUN Filed oct. 2. 1935 2 sheets-sheet 1 mh. Q

Feb. 8, 1938,

S. BRAMSEN Er A1. 2,107,726

' SPRAY GUN Y vFiled Oct. 2, 1935 2 Sheets-Sheet 2 I `Patentedv lFeb. 1.9%

UNITED srres PATENT oi-*Fiv sanar con" Svend Bremsen and Fritz Wahlin, Chicago, Ill., lassimilare to Binlxs Manufacturing Company,

Chicagc, El., a corporation of Delaware Application @atelier 2, 1%5, Serial No. 43,244

15 Claims.

Our invention relates to novel structural features of spray guns, its general objects being these:` y

I (l) Providing a novel and easily manufactured two-part gun body which will permit the forward part of this body toy be of highly durable and accurately machinable material while allow-- ing the main body part yto be of lighter and cheaper material, and which will allow the forward body part to be clamped directly and rmly flatwise against the main body part. (2) Providing a two-part assembly for this purpose which willpermit a relatively smalldiametered stock pant of the gun body to have a main air passage of large eiective area even when a side air controivalve extends within this passage. i

(3) Providing a two-part body assembly which will permit the'use of straight, instead of taper- 0' lng, threaded connections between the connecting memberam'i the two body'partsso as to in- A'sure a tightly, sealed connection between these parts even with |such looseness or inexact fitting of thethreads as is encountered in the commercial manufacturing of spray guns.

(4) Providing a body part connecting member whichy can readily be rotated (and. if desired, latched in position) before the side-air control provisions are attached to the main body part. :lo g (5) ,Providing a two-part body assembly in which the forward (harder metal) part will afford a seat for a supplemental air valve controlling the supply of air to the side ports of an air nozzle attached to this frontal body part. 3.; (6) Providing the said side-air Vcontrol valve with a head slidably guided by the forward body part, and constructing this valve head so as to permit an ample ilow' of air past the guided head portion when the valve is retracted from io its seat.

Y(7) vProviding straight and easily drilled ports within the forward body part through which air can ilow into the usual central port of the air nozzle of the gun.

(8) Providing effective means, associated with the adjusting and valve-closing provisions for the said supplemental air valve, for preventing a leakage of air when the said valve is being adjusted in position by a digital manipulation tend- .o ing to tiltV the axis of the valve.

(9) Providing an adjusting provision for the supplemental air control valve which will' either permit the valve adjustment to be made digitally, or will require a special key for that purpose.

Illustrative of the manner in which we accom;

piish the above recited. as well as further objects, i

Fig'. 1 is an enlarged central longitudinal and vertical section through a spray gun embodying our invention, with the usual suspension hook, the major portion of the handle and the lower 5 portion of the trigger broken away.

Fig. 2 is a reduced frontal perspective view of theforward portion of the main body part of the gun. I

Fig. 3 is a similarly reduced rear perspective lo view of the frontal body part.

Figs. 4 and 5 are respectively front and rear elevations 'of the frontal body part, drawn on a scale intermediate that of Figs. 1 and 3.

Fig..6 is a side elevation oi' the frontal body-15l part and the forward portion of the main body part, with a portion of each in central, vertical and longitudinal section, including the connecting nipple as the latter is positioned lprior to its rotation for fastening the said body 'parts to 20 Fig. 7 is an enlarged rear end view of the connecting nipple which attaches .the frontal body part to the main body part.

Fig'. 81s a perspective view of the forward porg5 tion of a tool suitable for use in rotating the' said nipple.

Fig. 9 is an enlarged perspective view of the head. of the supplemental air valve, and Fig. l0 is a similarly enlarged front elevation of this valve head. Y

Fig. 11 is an enlarged central and longitudinal section through the rearward guide and adjusting provisions associated with the supplemental air valve which has the head of Fig. 9, with the digitally operable knurled member detached and partly shown in elevation, and also showing the' screw whereby this member can be attached for digital use. Fig. 12 is an enlarged sectionv taken along the line l2-I2 of Fig. 1.

Fig. 13 is a vertical section through the material valve of the gun and parts adjacent thereto, showing the conjoint use of simple tools for` adjusting the effective length of the socalled needle valve from the front of the gun.

Fig. 14 is a front elevation of the head of this valve.

Fig. l5 is a fragmentary section of the upper rear end corner ofthe gun body, showing the substitution of a closure plug for thedetachable spray-shape control parts of Fig. l1 when the same gun isto be used without a flattening of tions of the rear end of the body part connecting nipple and of the main gun body part.

In Fig. 1, the main body part ofour gun includes a, normally horizontal barrel or stock S 'from the rearward portion of which the usual handle il@ depends, and the handle has the usual air supply passage A for supplying air past a main air valve V and through a port P to a longitudinal main air passage Min the stock.

For this main passage, we initially provide a corresponding bore extending entirely through of the stock.

The separately manufactured forward Vpart I-I of the gun body. shown separately in Fig. 3, is of the general shape of a hollow elbow, which elbow has an upright arm h threaded at its lower end for coupling'a material supply hose to it, and has its other arm extending forwardly and enlarged at its forward end into a head against which anl air nozzle N can be clamped by an attaching ring R. This forward body part H also has an upwardly directed nub n 'overlying the bore of the upright arm h ofthe elbow. This nub has its rear face nl in a plane at right angles to the axis of the bore i of the forward arm of the said elbow-shaped part, and the nub isshaped so that its said planular rear face extends downwardly beyond the said bore axis and around the forward end of the hereafter recited tapering boss 2.

In laddition, the forward part of our gun body includes a tubular boss 2 extending rearwardly from the said rear face and coaxial with the bore l of the forward (and upper) arm of the said elbow. This tubular shank is of greater length than the thickness of the lug L on the stock of the main body part yand has its forward portion tapering rearwardly and desirably formed for fitting into the tapering bore B 'of the said stock lug, in addition-to having a more rearward and smaller diametered extension 3.

Extending forwardly into the riser nub n of the forward body part is Va bore 5 which alines axially with the main air passage M in the stock S lof the main body part when the said forward body part has its said rear face n1 bearing flatwise against the end face of both the said stock and the lugA L which depends from that stock, and when the tapering boss 2 of the forward body part is socketed in the bore B of the said lug.

To clamp the head part to the body part when these separately manufactured portions of our gun body are thus positioned, we employ a simple hard metal nipple (generally designated as l)v which has its two end portions reversely threaded, desirably with a straight right-hand thread 1a (Fig. 6) on a relatively short front portion of the nipple and .with a left-hand straight thread 1b on a much longer rear portion. This nipple preferably lalso has an unthreaded portion lc disposed between its` said reversely threaded portions, which cylindrical portion lc can readily be gripped for initially screwing the nipple part way into the gun Stock aromas before beginning to attach the head part of the body to the said stock. In addition, we preferably broach at least av considerable rearward part of the bore of the nipple to form longitudinal grooves in that bore-as for example by forming the twelve uniformly spaced grooves ld shown in the enlarged end view of Fig. 7, so that a rotating tool 'I' of hexagonal section can be slidably inserted in either of two rotationalpo- `sitions into (or even through) `the polygonal bore of the nipple.

To cooperate with the said doubly threaded nipple, we provide the bore 5 inthe forward body part with a thread 5a (Fig. 6) fitting the forward thread 'la on the nipple, and preferably form a relatively shorter rear end portion 5b of the said bore of larger diameter.

In the stock of the main body part we form the forward portion m of the main air passage M so as to present a cylindrical extreme forward portion, and thread the part ml of this passage behind the said cylindrical portion to` match the rearward threaded part 1b of the nipple. In

addition, we make the joint depth of the said cylindrical bore portions 5b and m somewhat greater than the length of the unthreaded part 'lc of the nipple. v

In assembling the two body parts, the nipple is first screwed into the stock bore of the main body to such an extent--as shown for example in Fig. (i-that the spacing 8 between` the rear end of the nipple and the rear end of the thread m1 in the said bore is greater than the lengthof'the thread 5a in the forward part of the body. When this head part is moved slightmultl-grooved bore of the nipple, a rotation of this tool in the same direction as the threading of the forward end part of the nipple will screw the nipple into the head part thread 5a; and, owing to the relatively reverse threading 6b on the rear end part of the nipple the same rotation of the nipple will also back the nipple into the stock. Consequently, with the lengths of the recited bore and nipple parts suitably proportioned, anyone can speedily rotate this nipple until the rear face of the head part is flrmly clamped against the co-planular faces of the front end of the stock S and the body lug L.

During this attaching, the Obliquity of the opposed faces of the two body parts to the axis of the nipple will cause the forward body part to move somewhat upward. But this does not prevent the tapering boss 2 on the head part from freelyentering the bore B of the depending lug onthe stock when the said lug bore has its axis suitably spaced from the axis of the passage into which the nipple is being retracted, and when the cone angle of the taper of the lug bore is not less than twice the angle at which the axis of the main air passage M diverges rearwardly from the axis of the said lug bore. Indeed,

lwith the parts accurately proportioned, we can `assemble our two-part gun body when the said cone angles 0f both the lug bore and the boss I 'are eachvexactly twice the said axes-diversion angle, sothat we' obtain an exceedingly rigid assembling of the two Abody parts.

Moreover, after' the two body parts have thus 'been assembled, the bore of the rear end of the as shown in Fig. 16, thereby preventing the ordinary user ofA such a spray gun from separating the two body parts. On the other hand, if the nipple is. not thus forcibly anchored to the main body part, any good mechanic can readily be instructedhow-to unsorew the nipple for separating these body parts and attaching a; different forward body part-as for example one designed threaded for receiving the shank 9a of a material nozzle Sfhere. shown as having the discharge end 9b-of its bore of a large diameter suitable for sluggish materials (such as asphalt paints) and having a tapering Aportion engaging a forwardly flaring-seat Ia at the forward end of the said bore portion I of the material passage. v

When the issuing material is to be converted into a flattened spray, the head portion H of the forward body part is provided with a forwardly open annular channel I to which air is supplied, from the`air bore into which the nipple 1 opens, through a' smaller diametered bore II coaxial with the air passage M in the stock of the main body part. This permits us to have the valve controlling the side air for the air nozzle N-namely that supplied by the channel Ill to an 'opposed rearwardly opening channel in the air nozzle, and from the latter to the opposed side airports Ii-seat in the hard metal of the forward body part instead of having a seat for it in the soft metal which lightness demands for the main body part.

Such a side-air control valve desirably has its adjustin'g provisions at the rear end of the stock and it has heretofore been customary to use the forward tip of a valve stem as its seating portion, as also to support this valve stern only by guide means associated with its rearend portion.

' digitally rotating a knob associated with the rear end of the stem-this knob is apt to be pressed to one side during its rotation, thereby tilting the valve stem sufficiently to throw its forward end A' adjustment.

To overcome these difficulties. we employ a control valve having a diametrically enlarged head y attached to the usual slender stem, thereby allowing the bore II in the fdrward body part to be of much large.` diameter than the said stem and enabling u` to provide a valve seat ofdgreatly enlarged exea. In addition, we provide the valve head with .a portion, forward of its seating portion, which is slidably guided by the said bore II so that the valve stem is continually supported from both ends during its normal range of movement.

A 'I'hus Fig. l shows the slender valve stem I2 as having aforward iluted portion Ila tightly socketed in an axial bore extending forward into the rearward portionJId of a valve head which is shown on an enlarged scale in Fig. 9. This valve head has a forwardly tapering frustro-conical portion lfb adapted to seat in the flaring rearv end of the bore 5 in the forward body part, and the more' forwardA part .of the valve head has a plurality of radialy guide webs I3c which present their radially outer edges I3d in a common cylindrical surface corresponding to the said bore'5. 'I'hese webs arefreely spaced from e'ach other to permit air to flow between them from the space surrounding the forward portion of the said tapering part IIb, when the valve is retracted olf its said seat.

To move the side-air control valve longitudinally for its adjustment, we employ the control unit shown in Fig. 11, which can be attached to and detached from the main part of our gun body as unit. 'Ihis includes a sleeve I4 having a part Ila intermediate its length exteriorly threaded to fit a corresponding threaded portion of the rearward part of the air passage bore M, the sleeve also having-an enlarged head Mb en# gaging the rear end of the stock and having an Threaded into the forward end of thebore of the Vsleeve I4 is a tubular rear valve head I5 which has the forward portion of its bore contracted in diaxneter vand has the rear end portion of the valve stem I2 firmly socketed in this forward bore portion, and which rear valve head has its larger diameteredl rear bore portion I 5a of a uniform polygonal section. Extending slidably forward into this rear bore portion is the correspondingly sectioned forward end portion IBa of a plunger I8 which presents a head I6b in front of the interior annular ange Hc of the sleeve Il, and'which plunger slidably fits a cylindrical portion of the bore of this sleeve.

This plunger I8 is continually urged rearwardly-by a spring 20 interposed between the plunger head lib and the rear valve head I5, the pressure of the said spring being transmitted through a washer 52 engaging the rear end of the spring and a packing 48' disposed between the said washer and the plunger head I6b.

If. the spring pressed directly against the plunger head and a gasket behind this plunger head was the only packing associated with that head, we have found that any radial pressure exerted on the rear end of the plunger may tilt the plunger sufficiently off the axis of the valve sleeve I4 (if the threaded connection between that sleeve and the rear valve head I 5 is not highly exact) to reduce the compression of the gasket portion at one side of the plunger stem, thereby permitting a leakage of air.' But with two packing members respectively vat opposite -sidesvof the plunger head, a tilt in any plane dilametric of the plunger and tending to reduce the gasket compression at one side of 'the plunger ax's will cause the spring-pressed washer 2I to increase the compression of the packing 48 at the same side, so that our simple two-fold packing provision avoids the otherwise resulting air leakage. l

For a digital control'of the side air for the lair nozzle of our spray gun we employ a cap-like member, which, as also shown'in Fig. 11 has a polygonally sectioned shank I8a slidably fitting the rear end ISd of the plunger I6, and also has an enlarged and peripherally knurled rear end knob I3, this cap-like member being fastened to the plunger by a screw I9 threaded into the said plunger end I6d, as in Fig. 1.

Thus assembled, a digital rotation of the knob I8 will rotate the plunger, and the intertting of the polygonal forward portion with the correspondingly sectioned part I5a of the rear valve head I5 will cause the rear valve head to rotate with it, so that the threaded connection of this valve head to the stationary sleeve I4 will cause the control valve to move forward or rearward according to the direction of the said rotation.

Moreover, since this -control valve is guided at both ends, any commercial lack of axial alinement between the just described plunger and the guide for the forward head of the controlv valve will be immaterial, as the slenderness and length of. the valve stem i2 will readily allow this to flex accordingly.

In practice we have found that with our heretofore described simple nipple arrangement for fastening a separately formed forward body part to the stock, of a main body part we can obtain a highly secure assembly with a connecting nipple having a bore nearly as large in diameter as the air passage M in the said stock,-and with the rear end of the nipple still spaced considerably forward from the port P which admits air to the said passage. This use of a large bored nipple also allows ampie airspace around the valve stem I2 extending through it, so' that the pressure loss of air owing from the said port to the air inlet bore 6 of the forward body part can be quite small even in a generally small diametered stock.

So also, the forming of the guide bore II in the forward part of our gun body allows us` to provide straight bores 50 leading to the'f-ront of this body part from the bore 5 behind the seat for the side-.air control valve, through which boresaircan flow (along the arrow line in Fig. 1) to the central air port 5I of the air nozzle of our spray gun.

.Moreoven if. the spray gun is to be used by unskilled operators, the knobbed member I8 of Fig. 11 can readily be detached ,byI merely removing the screw I9 and thesupervisor canvthen carry this with him after he has made the ide-v sired adjustment, vsince the rear end i3d of `the valve plunger cannot readily be rotated with an ordinarily accessible tool.

' Whenl our spray gun is to be used with heavy vand sluggish materials (such as asphalt, cement paints, or tar roofing materials) we desirably control the ilow of material through the gun by a material valve havinga head portion adapted tol seat at the rear end of the bore of that nozzle,

so that the head member can be adjusted longitudinally on the said st em andl then locked againstrotation bya capnut 24 which extends into the forward bore portion 22h and bears against the bottom of that bore portion.

The major and rearward portion of this head member is an exteriorly cylindrical shank 22a whichextends slidably through an axial bore 3a' in the rearwardly extending boss 3 on the forward part of our gun body, while the head proper (22) is disposed continuously within the upright proportion to that of the valve stem 2i) enables us to obtain a much better guiding than if the said stem was directly guided by a bore in the boss 3 as heretoforeproposed. 'I'he just described construction of the material-discharge controlling valve and the parts associated therewith has been more fully disclosed and claimed in our co pending' application #69.762, filed March 20, i936 on a Material-discharge control valve for spray guns.

The valve stem 2l extends through a suitable aperture in the usual trigger 21 which actuates the main air valve V, and thereafter rearwardly vinto a presser head 28 to which the said valve stem is fastened by cross-pin 29. This presser head extends into a spring cylinder 32 and has a shoulder bearing rearwardly against a ring 30 slidable in the saidcylinder, which ring is continuously pressed against the said shoulder by a spring 3I which bears rearwardly against a detachable rear cylinder head 33, after the manner more fully disclosed in our copending application #47.580, filed October 31, 1935.

Bearing rearwardly against the forward end of the presser head 28 and slidably guided by a forward tubular extension 34 of the said cylinder is a tube 35 having a considerably larger bore than the diameter of the valve stem 2|, which tube has' a' head 36'fastened to its forward end. and dis-- free to flex, ,so that we eliminate the heretofore often encountered binding or cramping of such a valve stem vwhich occurs when this stem slides in bores fitting it.

To adjust the eiective length of the valve stem 2l, the user partly unscrews the cap nut 2l and then retracts the valve by rearward pressure on the trigger 21 sulciently to open the valve somewhat, and grips the valvevstem portion in front of the trigger to hold the latter from rotating. While thus gripping the valve stem. the user can rotate the valve head in either direction by a tool gripping that head, as per example by a knobbed tube 39 which has projecting fingers 391;- -at .its tip (as in Fig. 13) for entering portions of a ldiametric slot 22e (Fig. 14)`in the forward end of the valve head 22; and he can thereafter insert a screw-driver shank I9 through the bore of the said tube 39 (as in Fig. 13) to` screw the locknut 24 down onits seat again.

With our gun :thus constructed, a detaching of body part so as to permit part of our gun of a light aluminum alloy, while using a hard bronze drop forging for the forward an accurate machining of the latter part-as for example the threading of'the bore portion 5a nipple extends. With this threading accurately fitting that of the nipple (which nipple desirably is of steel) an accurate iit of the rear threaded nipple portion is less material because of the much greater length of the latter threading.

By thus using a nipple of relatively short length in proportion to that of the air passage M for tightly and rigidly connecting the two body parts we eliminate the decided throttling of the said passage which occurs when an attaching member extends through the entire length of the passage,

as heretofore proposed. We also eliminate the dimculty of preventing air leakage at the rear end of this passage, as encountered with a heretofore proposed full length attaching member.

' and 'in addition we are able to .employ an accurately guided and sensitively adjustable control valve for the air supply to the side air ports of the air nozzle of the gun.

However, while we have heretofore described our invention in connection with an embodiment including numerous desirable details of construction and arrangements, it should be obvious that changes might be made without departing either from the spirit of our invention or from the appended claims.

Moreover, it is to be understood that various features of our invention need not be used conjointly with one another. Thus, the same main body part may be used interchangeably with forward body parts adapted for use with other nozzle assemblies, as shown for example in our said copending application #47,580. So also, if the air nozzle of the gun requires no side air ports, or needs no adjustment of the air supply fory its side air ports, the supplemental air control valve with its frontal head and the valve4 control means shown in Fig. 11 may all be omitted to cheapen the gun. In this case a mere plug 4| may be used for closing the rear end of the main air passageM in the stock of the gun body, as shown in Fig. 15. y

We claim as our invention:

1. A body assembly for a spray gun, comprising: a main body part having an axially straight longitudinal air supply passage extending through it; a forward body part bearing flatwise against the forward end of the main body part and having a secondary air passage extending through it, the rearward portion o f which secondary passage alines axially with the said air supply passage; and a nipple having its end portions threaded in relatively reverse directions into the rear endy of the said secondary passage and into a forward portion of the'said air supply passage to clamp the said head part against the said'body part; the said air supply passage having its rear end freely openv during the initial assembling of the gun body to permit the insertion of a tool for rotating the said nipple.

2. A body assembly for aspray gun, as per claim l, in which the threaded connection of the said nipple to the bore oi the air supply passage in the main body part is considerably longer than the reversely directed thread on the nipple, so as to permit the nipple to be threaded part way into the'said air supply passage before the nipple part.

into which the attaching A is rotated further in the same direction during the attaching ofthe head part to the main body 3. A body assembly yformal spray gun, as per claim 1, in which the nipple has an unthreaded exterior portion between its said reversely threaded end portions, and in which the said 4main air passage has a cylindrical bore portion between the front end of that passage and the y portion of that passage into which the rearward part of the nipple is threaded, which cylindrical bore portion of the mainair passage normally houses at least the major portion of the unthreaded exterior portion of the said tube.

4. A spray gun body assembly as per claim 1, in which at least the rear end portion of the bore of the nipple has re-entrant formations adapted. to be engaged by a tool for rotating the nipple 'to effect the said clamping.

5. A spray gun body assembly as per claim 1, in which the air passage in the said head part has a diametrically contracted portion-.forward of the part of the last named passage' into which the nipple is threaded, the rear end of the said contracted passage portion affording a rearwardly facing annular seat coaxial with the main air supply passage in the main body part.

6. In a spray gun, a body comprising a stock having a longitudinal air passage opening at the front end of the stock, and a forward body part bearing rearwardly against the front end of the stock and having a secondary air passage the rear end of whichalines with the forward end of the longitudinal air passage in the stock; a

nipple having its opposite ends threaded in rotationally reverse directions respectively into the rear end portion of the said secondary passage and the forward portion of the longitudinal air passage in the stock, the nipple clamping the head partv of the body to the saidr stock; the sec ondary air passage having a part thereof, forward of the nipple, formed as a rearwardly facing seat alining axially with the longitudinal passage in the stock; and a longitudinally movable valve member extending freely within the said longitudinal passage and freely through the bore of the said nipple, the valve member having a forward part adapted to engage the said seat.

7. A spray gun body and valve assembly as per claim 6, including means supported in the rear end of the said longitudinal passage and connected to the rear end of the said valve member for moving that. valve me ber toward and away from the said seat.

8. A body andvalve in which the head part of the body also has a supplemental air passage extending through it and presenting an inlet, spaced from the said seat, leading from the part of the secondary air passage behind the said seat. i

9. A spray gun body and valve assembly as per claim 6, in which the secondary airpassage in the head part of the body has a cylindrical portion adjacent to and forward of the said annular seat; and in which the valve member has a portion forward of its said seatrengageable part extending into and slidably guided by the said cylindrical portion of the secondary air passage, the said portion of the valve member having longitudinal' surface grobves through which air can flow when the valve member is retracted to move the said seat-engageable part away from the said annular seat.' f

l0. In a spray gun, a body comprising a, stock having a longitudinal air passage opening at the assembly as per claim 6,

front end of the stock, and a forward part bearing rearwardly against the frontend of the stock andhaving a secondary air passage the rear end of which alines withvthe forward end of the longitudinal air passage in the stock; a tubular member having its opposite ends socketedrespectively in the rear'end portion of the said secondary passage and in the forward portion of the longitudinal air passage in the stock; the secondary air passage having a part thereof, forward of the tube, formed as a rearwardlyfacing seat alining axially with the longitudinal passage in the stock; a longitudinally movable valve member extending freely ,within the said longitudinal passage and freely through the bore of the "said tube, and having a. forward part adapted to engage the said seat; and a valve control unit extending into the'rear end of the saidlongitudinal air passage and connected to the rear end of the said valve member, the control unit eifectively sealing the rear end of the longitudinal air passage and the stock having an air port for admitting air to the last named passage at a point between the control unit and the rear end of the said tubular member. y

11. Al spray gun body assembly as per claim 10, in which the forward body part also has at l -least one auxiliary air passage leading to the front of that body part from portions of the secondary air passage radially outward of the said seat.

12. In a spray appliance in which there is a f body member formed with a. rearwardly open bore and in which a. movable valve member has astem extending within and coaxial with the said bore, and in which the appliance includes a. seat adapted to be engaged by a forward pornular flange intermediate its ends, a stem end member fastened to the rear end of the said vstem and threaded vinto the forward end of the bore of the .said sleeve, the said member presenting a prismaticbore behind the part of that member to4 which the said stem -is fastened; a plunger disposed within the'said sleeve and having a. peripheral ange disposed forwardly of the' interior ange of the sleeve and slidably titting the bore of the sleeve; the plunger having a polygonal forward end portion extending into and slidably fitting the said prismatic bore of the stem end member; a compression spring opera'tlvely interposed between the rear end of the said stem end member and the said peripheral ange of the plunger; and means manually operable from the rear of the said sleeve for rotatingthe plunger, to cause the plunger to rotate the said stemendalso, whereby the threading of the' stem end member into the sleeve will cause rotation of that member to move the said mmbefand the valve stem attached to it longitudinally `of the said bore.

13. Means for controlling a movable valve member of a spray appliance, as per claim 12.

, including an annular packing disposed between the said peripheral flange of the plunger and the rear end of thespring.

14. Means for controlling a movable valve member' of a spray appliance, as per claim 12, including an annual packing disposed between the said peripheral ange of the plunger and the rear end of the spring, and a second packing member disposed between the peripheral flange of the plunger and the` interior flange of the sleeve.

' 15. Means for controlling a movable valve member of a spray appliance, asper claimv12, in which the manually operable meansinclude a plunger portion extending rearwardly through the bore of the saidinteriorvange of the sleeve and presenting a near end portion of polygonal section, and a forwardly opening cap member slidably tted upon the said rear plunger end,

and means detachably fastening the cap member to the said plunger end, the cap member presenting a digitally actuable portion behind the said sleeve.

SVEND BRAMSEN. FRITZ WAHLIN. Y

Images