US1380866A

US1380866A - Tool for applying coating

Info

Publication number: US1380866A
Application number: US309691A
Authority: US
Inventors: Herbert W Day
Original assignee: SPRAY ENGINEERING CO
Current assignee: SPRAY ENGINEERING Co
Priority date: 1919-07-09
Filing date: 1919-07-09
Publication date: 1921-06-07
Anticipated expiration: 1938-06-07

Description

H. W. DAY.

TOOL FOR PPLYING COATING.

APPLICATION FILED IIILY 9,1919.

Patented June 79 H2L LSSOSOD H. W. DAY.

TOOL FOR APPLYING COATING.

APPLICATION FILED IuLY 9,1919.

Patented June 7, MEL

2 SHEETS-SHEET 2 Lacasse.-

EERBERT w. DAY, or; WoLLAsToN, MASSACHUSETTS, l'Assienon To snaar ENGI- Nannini@ company, or BOSTON, MASSACHUSETTS, a conroaATioN or Massa- CHUSETTS.

Specification of Letters Patent.

Patented aan@ resi.

Application led .T1-ily 9, 1919. Serial No. 309,691..

To aZZ whom t may concern:

Be it known that I, HERBERT W. DAY, a citizen of the United States, and a resident of Wollaston, in the county of Norfolk and State of Massachusetts, have invented an lmprovement in flools for Applying Coating, of which the following description, in connectionwith the accompanying drawings, is a specification, like characters on the drawings r'epresenting like parts.

rlhis invention relates to tools or appliances for applying coating to surfaces, and in certain aspects thereof is an improvement upon the construction shown and the invention disclosed in my Patent No. 1,172,233, dated February 15, 1916;

The coating, if a liquid, may be apaint, japan, varnish or any other suitable coating medium,- or it may be a solidin powdered form, and the material or surface to which it/is to be applied may be of any character,

such, for example, as wood, metal or other material.

An` important object of the invention is to provide an industrial tool which may be' used not only in rough work not requiring .a

great nicety of manufacture or costly and delicate parts, but which may be used satisyfactorily in ine Work. Other objects of the invention may be set forth hereinafter.

Referring more particularly to the drawings, wherein l have represented a single embodiment of my invention,-

Figure 1 is a side elevation of a tool constructed in accordance with my invention;

F ig. 2 is a view mainly in vertical section and representing the parts in open position; Fig. 3 is a detail representing one of the valves in a diderent position;

Fig. 4 is a side elevation of a slightly i modified form of myinvention;

Fig. 5 is a detail of a valve mechanism thereofA in vertical section, and

Figl 6 is a detail in vertical section of a portion of the valve mechanism of such modiiied'form of my invention.

The tool or appliance may be of any suitable material, but is preferably metallic. The body 1 thereof maybe of any suitable form, and preferably it is provided with a handle vor extension 2 which may be integral therewith. rlhe body and saidihandle are provided with a passage 3 for air or other suitable Ifluid under pressure and constituti jacent thereto.

5, 6 tapped into the passages 3, 4f respecv tively. i

The body 1 near its outer end is threaded as represented at 7 for the reception of a cap 8 internally threaded at 9 and provided with a" discharge orifice 10 for the motive agent and the coating material. Preferably l provide interchangeable caps having di'erent sizes or characters of opening 10 in accordance with the ty e of work upon which it is desired to use t e tool.

ln my said Patent No. 1,172,233 l.' have disclosed means for forming a lrfi of the coating material which is broken up and dischargedv by the air or other motive agent, the. lm being yconstantly renewed by capillarity. ln' accordance with my present invention, l provide and maintain a film in .substantially the same manner between the inner surface of the cap 8 as at 11, and the outer surface 12 bf\a'nip`ple 13 externally threadedat its innerend as indicated at 14 and received upon the internally threaded end 15 of a' sliding sleeve16. For sake of clearness, l have somewhat exaggerated the space between the surfaces 11, 12 when the parts are in open position. 1t is to be understood that the surfaces are in open position in such relation to each other as to secure the formation and rfc-formation of a film substantially as disclosed in my ysaid patent. The sliding sleeve16 is positioned'with a suitable sliding fit within a nut-like member 17 threaded as indicated at 18 into the inner threaded surface 19 of the body 1. If desired, l may provide packing between the member 17 and the sleeve 16 as indicated at 20,' 21, the packing here shown consisting of annular strips of leather folded upon themselves into substantially Usshape in cross section and so positioned that fluid tending to enter between the folds of the material operates to edect. a tighter relation between theI packing and the metallic surfaces ad-k Within the 4sliding sleeve 1651 position the spindle valve 22 having a tapered forward end 23 adapted to enter the tapered portion 24 ofthe axial opening 25 extending through the nipple 13 and to close said passage 25 when the spindle 22 is in its forward position. rlhe spindle 22 is provided with an integral formation or attached part 26 having longitudinal passa es 27 permittin the. flow of air along t e spindle 22. This construction may be secured by forming the part 26 as a collar having in effect radiating teeth.

A t some suitable point, the inner surface of the sliding sleeve 16 is provided with an annular shoulder 28 against which the part or collar 26 is adapted to take when 1n the position shown in Fig. 2. l

rlhe body 1 at its rear end is shown as having an air chamber 29, preferably of relatively large diameter and closed at the outer end by a threaded cap 30. rlhe cham-.

ber 29 which may be formed separately from the main part of the body 1 is secured thereto by means of a nut 31 externally threaded as indicated at 32 to engage the interiorly threadedpart 33 of the body .1, as clearly indicated at Fig. '2. Between the inner end of the nut 31 and the adjacent end of the sliding sleeve 16 is a coiled spring 34 tending constantly to move the sliding sleeve forward or towardv the left, viewing Fig. 2, and therefore through the engagement ofthe shoulder 28 with the part ofr collar 26 to move the spindle 22 in the same direction.

Suitably secured upon the spindle 22 Within the chamber 29 is a piston-like member 35 herein shown as consisting of a middle leather disk 36 and outer metallic disks 37 all held in face tov face relation by

nuts

38, 38 upon the threaded end 39 of the spindle 22. 1

IThreaded into 29 is a screw 40 having a lock nut 41. The screw 40 constitutes a lock when moved inward suiiiciently to hold the spindle 22 in closed position and in such position of the parts the tool or appliance cannot be operated. rlhe screw 41 also constitutes a limiting means for the movement toward the right of the spindle 22. Leading intd the air chamber 29 are two

passages

42, 43 extending from an air cham'- ber 44 in communication with the air passage 3 through the port 45. The air chamber 44 is internally threaded as indi-cated at 46 and receives a threaded plug 47 having an opening 48 for the escape of air from the chamber 44 to the atmosphere.

Within the chamber 44 is a valve 49 mounted upon a suitable-stem 50 and adapted to govern the port or passage.43. Also mounted upon said stem 50 is a valve 51 controlling the port or passage 42.

In order to operate the

valves

49, 51,][provide any suitable means, as, for example, a lever 52 pivoted at 53 upon the arm 54 Ithe ,cap 30 of the chamberv yspaced guiding projections 61.

mense@ j herein shown as extending from a collar 55 lis provided with an operating lhandle 59 permitting convenient manipulation by a nger or. thumb of the user of the tool. When the tool is in closed position, the surface 12 of the nipple' 13 is in contact with the inn yrsurface 11 of the cap 8, thus entirely c tting olf the flow of the paint or other coating material at substantially the point of ultimate discharge and destroying the film formation for the time being. The tapered end 23 of the spindle 22 is at the same time seated against the inner tapered surface 24 of the axial opening 25 in the nipple 13, thus cutting ofi' the supply of the compressed air or other motive fluid. When it is desired to -open or operate the tool, the lever 52 is pressed by the finger or thumb ofthe operator into the position shown in Fig. 2, thus cutting ofi' the fiosw of air through the passage 43 and opening the passage 42 to the flow of air against the left hand face of the piston 35. The air which was in the air chamber 29 to the rear of the piston 35 at the same time escapesthrough the orifice 48 to the atmosphere. lThe spindle 22 is thereupon moved to the right into the position shown in Fig. 2, and thus the passage 25 for the air is opened, the air passing thereto along the collar or part 26. The movement of the spindle 22 to the right brings the part or collar 26 into engagement with the shoulder 28, and thereupon the sliding sleeve 16 is moved to the right, viewing F ig. 2, against the tension of ythe coil spring 34. rlhe further movement to the right of the spindle 22 causes a movement in the same direction of the sliding sleeve 16 in its sliding movement by spaced projections 60 permitting the flow therebetween of the paint or other ciating material. Similarly, if desired, the adjacent end of the sliding sleeve 16 may be provided with the parts are maintained in the position. shown in Fig. 2, a film of the coating material is constantly formed between the adjacent surfaces 11 and 12, and is constantly broken by the stream of air passing through the axial passage 25. When it is desired to stop the operation ofthe tool, the pressure of the thumb or linger upon the lever 52 'is released, so that the air pressure moves the

valves

49,51 into the position shown in Fig. 3, and thereupon the spring 34' forces the So long as sliding sleeve 16 forward or toward the left viewing Fig. 2, so as to close the paint or other coating passage between the surfaces 11 and 12. The spindle 22 is caused to move with the sliding sleeve 16, because of the engagement of the part 26 and the shoulder 28, the sliding sleeve and spindle moving as a unit until the paint or coating passage is closed. The

valves

49, 51 having been moved into the position shown in Fig. 3, the passage of air through the port 42 is'cut off and the air enters through the port 43, and acting upon the right hand face of the piston 35, viewing Fig. 2, it forces the spindle 22 farther forward until the tapered end 23 thereof comes into engagement with the tapered inner surface 24of the air passage 25 through the nipple 13 thus closing said air passage 25.

Thus it will be observed that both the coating material and the motive fluid are cut oft' at substantially the point of ultimate discharge, and that the coating material is cut off before the flow of the motive agent is cut off. In moving the parts of the tool into operative or open position, the air passage-25 is opened rst and very shortly thereafter the paint or coating passage is opened, and the formation of the film is instituted and continued as already described. The motive fluid tends to cut ofi' the flow of such fiuid when directed against the right hand face of the plunger 35, and it tends, with the coperation of the spring 34, as already set forth, to cut off the flow of the coating material. The paint passage is opened against the action of the spring 34, but the initial opening of the air passage is not opposed by the said spring.

The construction shown in Figs. 4, 5 and 6 is essentially similar to that shown in Figs. 1, 2 and 3, with the exception that the tool is mounted upon an elongated handle or support 64 whereby otherwise inaccessible parts may be readily treated in accordance with my invention. Having so mounted the tool upon an elongated support, it is necessary or highly important that means be provided within the ready access of the operator for operating the tool. Vhile to that end, I may provide any suitable mechanism, I have herein shown the following construction. I have provided the stem 50 with valves 49', 51. and through the valve 49 I have provided a small opening or leak 65. Instead of providing the plug 47 with the opening 48 to the atmosphere, I have connected to said plug a flexible tube 66 herein shown as extending into the handle 64 and preferably to the lower end thereof as indicated in Fig. 5, where the tube 66 is seated at 67 in a cap 68 fast upon the lower end of the handle 64. Forming a. part of the cap 68 is a plate or member 69 having a port 70 and between the plate 69 and the base of the cap 68 is a sliding plate or valve 71 having a port 72 therein adapted to register with the port 70. Any suitable means may be provided to operate the plate or valve 71. Herein for the purpose I have represented a hand operated lever 73 pivoted at 74 upon a lug or bracket 7 5 extending from the cap 68, said lever being suitably connected tothe plate or valve 71. Preferably I employ a coiled spring 76 tending to move said valve into open position, as indicated in Fig. 5. In the construction of parts represented in Figs. 4, 5 and 6, when the valve 7l is moved to close the port 72, and hence to prevent the escape of compressed air through the tube 66, pressure will build up in the chamber 44 until the pressure is equalized upon opposite faces of the valve 49', and with the position of parts shown in Fig. 2 the pressure is equalized upon opposite faces of the piston 35. The compressed air will, however, pass through the port 42 so as to act upon the left hand face of the piston 35, as hereilibeforev stated, and move the parts into the position shown in Fig. 2. When, however, the valve 71 is moved to the position shown in Fig. 5, the compressed air escapes through the tube 66, so that the pressure upon the left hand face of the valve 49 moves the valve into the closed position similar to that represented in Fig. 3. Any other suitable means may, however, be provided for operating the tool or implement of my invention from a position more or less remote from that portion of the tool represented in Figs. 1 and 2.

Having thus described one illustrative embodiment of my invention, I desire it to be understood that although specific terms are employed, they are used in a generic and descriptive sense and not for purposes of limitation, the scope of the invention being set forth in the following claims.

Claims:

1. Means for applying coating comprising means including two coating surfaces for maintaining therebetween a film of coat-ing material, said surfaces having film discharge openings, means whereby a motive agent may break through said film and discharge it through-said openings, said means including a valve 'controlling the flow of motive agent through said openings, and means for providing first a flow of motlve agent through said openings by movement of said valve vand then for producing, through the lnotive agent and by relative4 movement of said surfaces, a free movement of the coating material for film formation and maintenance.

2. `Means for applying coating comprising means for maintaining a film of coating material, and means for causlng a motive agent to break through and discharge said film, together with means for cutting ofi' both the coating material and the motive agent at substantially the point of ultimate discharge non-simultaneously.

3. Means for app-lying coating comprising means for maintaining a film of coating material, and means for causing a motive agent to break through and discharge said film, together with means for cutting off at substantially the point of ultimate discharge first the discharge of the coating material and then the flow of the motive agent.

1f. Means for applying coating comprising means including two coating surfaces for maintaining therebetween a film of coating material, said surfaces having film discharge openings, means whereby a motive agent may break through said film and discharge it through said opening, said means including a valve controlling the flow of motive agent through said openings, and

for stopping first the movement of the coatmg material and destroying the film formation, and for then stopping the flow of the motive agent.

5. Means for applying coating comprising means including two coating surfaces for maintaining therebetween a film of coating material, said surfaces having film discharge openings, means whereby a motive agent may break through said film and discharge it through said opening, said mea-ns including a valve controlling the flow of motive agent through said openings, together with means for causmg relative movement of .said co-acting surfaces to effect the cutting off of the coating material with destruction of the film formation, nonsimultaneously with the cutting off of the motive fluid through said discharge openmes. l

afi. Means for applying coating comprising means including co-acting film establishing surfaces for maintaining a film of coating material, and means for causing` a motive agent to break through and discharge said film, together with means for causing relative movement of said co-acting film-establishing surfaces to effect the cutting' off non-simultaneously of the flow of the motive fluid and the coating material with destruction of the film formation.

7. A tool for applying coating comprising a body having inner and outer cap-like members each perforatedand having surfaces in juxtaposition, means to move said inner caplike member to control the How of one of said agencies, and a valvev positioned at and controlling the flow of the other of said agencies through said perforations.

8. A tool for applying coating comprising a body having inner and outer cap-like members each perforated and having sur-l faces in juxtaposition, means to move said inner member, and a valve within the inner member controlling the fiow of the motive agent.

isasee ber to cut off the fiow of the Icoating mater1al, and a valve Within the inner member to cut off the flow of the motive agent.

10. A. tool for applying coating comprising a body having inner and outer cap-like members each perforated and having surfaces in juxtaposition, a passage for supplying coating material between said surfaces, a passage to supply a,motive agent through the inner member, a valve within the inner member controlling the flow of the motive agent, and means to move the inner member and the valve non-simultaneously to cut off and to permit the flow of the coating material and the motive fluid.

11. A tool for applying coating comprising a body having inner and outer members each perforated and having surfaces in juxtaposition, means to supply motive agent through said perforations, means to supply coating material between said surfaces for discharge through said outer perforation, and means for effectingthrough the motive gent the relative positioning of said memers.

12. A tool for applying coating comprising a body having inner and outer members each perforated and having surfaces in juxtaposition and between which a film is adapted to be established, means to supply motive agent through said perforations, means to supply coating material for said film, means for effecting through the motive agent the relativey positioning of said members, and means for controlling the supply of the motive agent.

13. A tool `for applying coating comprising a body having inner and outer cap-like members each perforated and having surfaces in juxtaposition, a valve positioned at and controlling the flow of motive fiuid through said inner member, means for operating said valve, and an operative connection between said valve and said inner member, thereby to operate said inner member to out off the How of coating material between said inner and outer members.

14. A tool for applying coating comprising a body having innerand outer cap-like members each perforated and having surfaces adapted to be placed in juxtaposition and between which a film is adapted to be formed and maintainedfa valve at and controlling the fiow of m'otive fluid through said inner member, a piston carried by said valve, and means to admit motive fluid to opposite faces of said piston, thereby to bring said surfaces into substantially con- 15. A tOOl for applying ing a body rseoee y tacting position for the destruction of said film and into substantiallyxspaced relat1on vto permit the ire-formation and re-maintenance of a film.

coating comprisingfa body having inner and outer cap-like members each perforated and having surfaces in juxtaposition, and controlling the flow of motive' fluid through said inner member, a piston carried by said valve, means for admitting motive fluid to opposite faces of the piston, thereby to operate said valve, an extension carried by said inner member and interengaging formations upon said valve and said extension, thereby to effect movement of the inner member by movement of the valve.

16 A tool for applying coating comprishaving inner and outer cap-like members VA'each perforated and having surfaces in juxtaposition, a spindle valve locatedat and controlling the flow of the motive agent through said inner member, a piston carried by said valve, manually operated means to admit the motive agent to either face of said piston, thereby to operate said valve, and a sliding part carrying said innermember.

. 17. A tool for applying coating comprising a body having inner and outer cap-like members each perforated and having surfaces in juxtaposition, a spindle valve located' at and controlling the flow ofthe motive agent through said innermember, a `piston carried by said valve, manually operated means to admit the motive agent to either face of said piston, thereby to operate said valve, a sliding part .carrying said inner member, and a spring acting upon said sliding part and tending normally to move said inner member into position to cut off the flow of coating material.

18. A tool for applying coating comprising a body having inner and outer cap-like members each perforated and having surfaces adapted to be placedin juxtaposition and between which a film may be established and maintained, a spindle valve locatedat and controlling the flow of the motive agent 4through said inner member, means to cause the motive fluid to operate said valve, and means whereby the motive fluid acts through said valve to control the flow of the coating material between said inner and outer members by so relatively positioning said caplike members as to permit the establishment of a film therebetween. A

19. A tool for applying coating compris- -ing a body having inner and outer cap-like members each perforated and having surfaces in juxtaposition, va spindle valve at and controlling the flow of the motive agent throu h said inner member, a piston carried byV said spindle, means for admitting ythe motive agent to opposite faces of said piston,

a valve located at 'through ysaid inner member,-a'fi"ston carried by said spindle,-means for admitting the motive agent to opposite faces of said piston, a movable part carrying said inner member, and means including a spring to effect the cutting-off movement of the inner member before the cutting off' of the motive agent. 21. vA tool for applying coating comprising a bo y having inner and outer cap-like .members each perforated and having surfaces in juxtaposition, a spindle valve at and controlling the flow of the motive agent through said inner member, a piston carried-by said spindle, means for admitting the mptive agent to opposite faces of said piston, a movable part carrying said inner member, and means including a spring to effect the cutting-off movement of the inner member before the cutting off of the motive agent, and to effect the opening movement of said member subsequent to the discharge of motive agent.y v

.22. A tool for applying coating comprising a body having inner and outer cap-like members each perforated and having surfaces in juxtaposition, a valve 22 controlling thepflow of the motive agent, a movable Ipart 16 carrying the inner member, means whereby the motive agent controls the movement of the valve 22, and interconnecting provisions between the valve 22 and 'the part 16.

23. A tool for applying coating comprising a body having inner and outer cap-like members each perforated and having surfaces in juxtaposition, a spindle valve 22, a piston 35 carried thereby,

valves

49, 51 controlling the admission of motive fluid to the opposite faces of said piston.v

24:. A tool for applying coating comprising a body having inner and outer cap-like members each perforated and having surfaces in juxtaposition, a spindle valve 22 having a piston 35, means to admit motive Huid to the opposite faces of said piston, a sliding member 'ifi carrying said inner member, a spring 34 co-acting with the member 16.

25. A tool for applying coating comprising a body having'inner and outer caplike members each perforated and having surfaces in juxtaposition, a spindle valve 22 having a piston 35, means to admit motive fluid to the opposite faces of said piston, a sliding member 16 carrying said inner 'memerning said perforations, and means for ef-y fecting relative movement ofsaid surfaces for providing first a free flovv of the motive agent and then providing through said motive agent a free movement of the coating material by establishing such a relative position of said surfaces as permits the 'establishment of a film therebetween.

27. Means for applying coating comprising perforated adjacent surfaces for maintaining a film of coatingy material therebetween, and means for causing a motive agent to break through and discharge said lm, together with a valve governing said perforations and means for effecting, through the motive agent, such a relative position of said surfaces as permits the establishment of a film therebetween.

28. Means for applying coating comprising means for maintaining a film of coating material, and means for causing a motive agent to break through and discharge said lm, together with means for providing, through the motive agent, a free movement of the coating material, together with means for* cutting oi' both the coating material and the motive agent at substantially the point of ultimate discharge non-simultaneously.

29. Means for applying coating comprisneeoee ing perforated adjacent surfaces for maintaining a fihn of coating material therebetween, and means for causing a motive agent to break through and discharge said lm, together With means including a valve governing the said perforations for causing first the flow of the motive agent and then causing the movement of the coating material, by effecting such a relative position of said surfaces as permits the establishment of a film therebetween and conversely, stopping first, through the motive agent, the movement ofthe coating material by so relatively positioning said surfaces as to destroy said film, and then stopping the flow of the motive agent.

30. Means for applying coating comprisi ing relatively movable film-establishing surfaces for maintaining a film of coating material, and means for causing a motive agent to break through and discharge said film, together with. means for causing relative movement of said film-establishing surfaces to effect the cutting off non-simultaneously of the flovv of the motive fluid and the coating "material 31. Means for applying coating comprising relatively movable film-establishing surfaces for maintaining a film of coating material, and means for causing a motive agent to break through and discharge said film, together with means for causing non-rotative' relative movement of said film-estab-` lishing surfaces to effect the cutting off of the flow of the coating material;

ln testimony whereof, l have signed my name to this specification.

ernennt W. nav.