US2252200A - Spray device - Google Patents

Description

A118 12, 1941 o. RL PLUMMER 2,252,200

SPRAY DEVI CE Filed March 18, 1940 2 sheets-sheet 1 glu/veniva All@ 12, 1941- O. R. PLUMMER 2,252,200

SPRAY DEVICE Filed March 18, 1940 2 Sheeis-Shec 2 Patented Aug. 12, 1941 UNITED STATES PATENT OFFICE Orla R. Plummer, Napoleon, Ohio v Application March 18, 1940, Serial No. 324,643

2 Claims.

This invention relates to controlled-delivery of a stream of material, whether gases, liquid, molten, or fine particles.

This invention has `utility especially in socalled spray gun equipment in cleaning, drying, moistening, applying pigment, and similar purposes.

Referring to the drawings:

Fig. 1 is a side. elevation of an embodiment of the invention ina hand tool of pistol form for spray gun use;

Fig. 2 is a view from the right of Fig. 1, parts being broken away;

Fig. 3 is` a section on the line III-III, Fig. 2, showing the working parts and passages in this pistol or spray gun tool;

Fig. 4 is a section on the line IV-IV, Fig. 3, showing the relation of the air supply passage and the packed stem or needle valve;

Fig. 5 is a sectiononthe line V-V, Fig. 3, showing the flow controlling adjustments of the motive fluid supply;

Fig. 6 is a View of the nozzle and of the gun with the double horned tip removed;

Fig. 7 is a side elevation of an embodiment of the tool, independent of the pistol grip handle, being thereby readily` adapted for mounting in a set-up wherein the work is shifted as to the tool instead of the tool used to deliver to the work;

Fig. 8 is a fragmentary view, with parts broken away, from the left of Fig. 7, showing features of the adjustment of the barrel;

Fig. 9 is a section on the line IX-IX, Fig. 8, showing the passages in the body for the motive fluid and supplemental material to be delivered; and

Fig. 10 is a fragmentary view of a battery or gang set-up of these tools wherein the material may be shifted relatively thereto, parts being broken away.

Body I is hereinshown with hook 2 adapted to hang the tool on a support 3, as when the device may be not in use (Fig. 3). This body I has notch 4 on the lower side providing clearance laterally of fitting 5, to which may be connected flexible duct 6 as a source for the material to fiow into, or be drawn into, chamber 1 of the body I. This chamber 1 has internally threaded portion 8 in which is fitting externally threaded portion 9 of head having main portion I0 abutting against circular end seats I I, I2, of the body I concentric with the chamber 1 in providing annular chamber I3 in communication by Ways I4 therefrom to a reduced portion I5. 'Ihe portion Il) has externally threaded region I 6 to mount sleeve I1 in which is mounted circular wedge beveled ends I9. This sleeve I1 has inwardly extending iiange 28 remote from the threaded portion I 6 forming a stop for this circular wedge I8 w-th slight clearance, in which may be located split ring 2|, effective as the sleeve I1 cooperates with the head to thrust the rigid wedge I8 into ring collapsing position, whereby this split ring 2| may form a clutch as entering groove 22 in the nozzle member 23.

These ways or passages I4 in the head I0, which has the sleeve I1 and nozzle member 23 assembled therewith, thereby provide annular chambers 24, 25, for motive fiuid supply vfrom the chamber I3. This nozzle member has diametrically located projections or horns 26 into which extend ways 21 havingV at an angle thereto inwardly directed ways 28 with terminal flares 29. In practice, these ways 28 having the spread termini 29 are directed to have converging pointl 38 in advance of tip 3l of the nozzle head, which provides slight clearance about terminus 32 of the head I0. In this terminus 32 is end 33 as a needle valve or closure for this head from stem 34 extending centrally through chamber or bore 35 from the chamber 1. The direction of these control `motive uid pressure supply jets from the flare ways 29 is such that the spread thereof effects an automatic cleaning of taper portion 36 of the nozzle member. Accordingly, in practice this tool is self-cleaning in the motive fiuid operation with such motive uid as directed upon the material supply or pigment to control such for confined or spread operation, whereby the tool may be used for fine lining, striping, or general spread purposes, according to adjustment.

'I'his stem 34 in the body I has compressible packing31 held therein by threaded nut 38. `The stem 34 in passing through this nut engages piston'39 having packing 40 held thereon by threaded disk 4I. This body I centrally of this piston has threaded portion 42 for cylinder 43 about the piston and provided with piston head 44, threaded thereon. This piston head 44 has centrally threaded `therein stop 45 upon which is lock nut 46. Knurled handle 41 may be operated to adjust this stop for its terminus 43 to abut the piston and thereby limit the retracting extent of this needle valve of the stem 34 as to the opening at the end 32. Helical compression spring 49 in the cylinder 43 normally urges this stem 34 into closure position. The retracting of this stem does not eiiect compression in this cylinder 43 due to vent opening 58.

This body I is herein shown having grip 5I I3 having of pistol type, wherein there is shield overhang 52 and finger separation projection 53. Above this latter projection 53 (Fig. 1) is trigger 54 having pivot mounting 55. This trigger 54 (Fig. 3) as swung on the pivot 55 toward the grip 5l acts upon stem 56 to unseat valve 51 against normal closing thereof effected by spring 58.

This tool, in addition to the material supply, whether duct or chamber, as connected to the fitting 5, may have duct 59 to fitting 6U, from which extends Way 6I in the grip tovalve chamber 62 normally closed by plug 63. From this valve chamber 62, as the valve 51 is unseated by the trigger 54, motive fluid, as compressed air, may flow by passages E4, 65, 66, into chamber 61 on the side of the piston 39 toward the body l. From this chamber 61 there is passage 68 in the body I to the annular chamber I3. In this passage 68 there is adjustable plug 69 (Fig. 5) which may regulate the relative flow volume to the chamber I3 for functioning as a motive 'fluid in the njet delivery of this device.`

The knurled adjustment 41 may so regulate the stop 48 that the stem 34 does not move into open position relatively to the end, 32. Accordingly, pulling of the trigger 5,4 will then function for the determined flow as by the control plug 69 in delivering this jetting motive fluid from the nozzle or tip. This may be alone', say for cleaning purposes, or a particular character of motive fluid which might be for disinfecting or other purpose. In combining the delivery, it lis only necessary that the knurled adjustment 41 be controlled to the position for locating the stop 4,8 as desired, which as to clearance from the piston may then be locked by theY lock nut 4 6. It thus follows that as the trigger 54 is pulled to open the motive fluid supply, this motive fluid Vwill automatically open` theend 32 by Withdrawing the stem34, This means, that at no time may there be any, advance accumulation of pigment ,or other solid material on the tool, but that'the motive uid is primarily in service and is effective to the discontinuance of such service. The-consistency of the material. to be delivered, andthe induction action, if gravity be not effective, are factors usedv in control by the auxiliary adjustment plug 69. However, in normal. operation it is onlynecessary. that the tool be directed and thetrigger be,Y controlled in the efficient functioning hereunder. Inasmuch` as the diametrical location of the projections for the spray-may-determine the direction of the swath astol width, such maybe in the plane of the grip or at any anglethereto', even to crosswise. To effect such,

it is only necessary to shift the externally knurled sleeve I1 to` release the' split ring 2| and then angularly locate the pair of diametrically disposed -jet delivery portions as desired, with the sleeve I1. then re-set to hold in such adjusted position.

This tool as described is such as may be handled by the operatorV in directing toward the work and shifted along or upon different articles of work. In some instances of use there may be a shifting of the work relatively to the tool, and even grouping of tools, whether for similar or dissimilar material delivery upon the Work. To such end, in lieu of the hook 2 which may be used to hang up the tool as out of use, therev may be eye 10 (Fig. '7) on support rod 1I (Fig. 10) as a fixed anchorage. In lieu of the trigger 54, valve 12 may cause the pigment or material to be sprayed for the respective tools. The material supply thereto may be controlled by main valve 13 in line 13 having the branches 6, in the event the supply be of similar material instead of different material to the guns or various tools.

From the valve 12 the motive fluid has main line 14 to branch valve 15. Further supplemental ovv adjustments may be made for the motive fluid vby adjusting the plug 69 in each tool or gun and by adjusting each knurled head 41 for the stop 48. There is accordingly possible hereunder accurate adjustment for the respective tools. The self-cleaning operations of the tools insures the maintenance of the character of operation for which initially set so long as the material supplied be uniform.

The countersunk feature 29 for the air ports 28 is eifective to protect these minute or small portsfrom jamming in use, and thus avoids 'any -hazard to,l this tool from` rough usage in handling operations.

What is claimed and it is desired to. secure by United States Letters Patent is:

1.` A ,nozzle member provided with a tip having a discharge Way, a head. for the member having a Way, a sleeve mounted on the head and having a flange and clearancey as to the member into which clearance the member may beinserted, a split ring about theA member in the clearance, and a Wedge coacting vbetween, the head and ring as acted upon by the sleeve flange to have the effective diameter of the ring changed by sleeve rotation relatively to the head for coaction with-the memberin one-directionfor releaseas-efecting swivel mounting of the member as to thehead and in the other directionin effecting clamping action between the splitv ring and wedge to holdfthevmember in the desired set position therefor as tothe head.

2A A nozzle tip having. a discharge Way and a portion having a groove, ahead, a sleeve mounted on the head havingaange and clearance relatively to the groovea ringvin the sleeve opposing said groove,y and-a Wedge concentric with the sleeve andextending from the head, whereby upon rotation of the sleeve relatively to the head ther-ing as held b y the sleeve flange may be clamped into engagementwith the groove, in effecting holding after swivel adjustment in the mounting of the tipas to the head, for facility in angular adjustment ofthe tip as to thehead;Y

QRLA R. PLULMER.

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