US1613588A

US1613588A - Air brush

Info

Publication number: US1613588A
Application number: US682700A
Authority: US
Inventors: William F Gradolph; Mueller Godfrey
Original assignee: DE VILBISS Manufacturing CO
Current assignee: DE VILBISS Manufacturing CO
Priority date: 1923-12-26
Filing date: 1923-12-26
Publication date: 1927-01-04
Anticipated expiration: 1944-01-04

Description

Patente aan. 4, i927.

WILLIAM E'. GRADOLPH-AND GODFREY MUELLER, OF TOLEDO, OHIO, ASSIGNORS TO'THE DE VTLBISS MANUFACTURING COMPANY, F TOLEDO, OHIO, .A UGRPORATION 0F GEIQ..

.AIR BRUSH.

.application med.l December 26, 192,3. Serial No. 682,700.

This invention relates to spraying instruments, of the type commonly known as airbrushes, and has particularly for its object the provision of various improvements on the air-brush shown and described in United States Letters Patent No. 1,260,522, dated March 26, 1918, whereby to enhance the practicability and commercial value of apparatus of this character.

.Une object of the invention isthe provision of an air-brush, having its parts so assembled and secured together as to enable them to be easily and quickly separated for the purpose of-cleaning or repairing.

Another object of the invention is to so mount the air nozzleon the liquid nozzle that one is centered in true concentric relation on the other, thereby maintaining the 10 discharge orifices of the .two in concentric relation.

This invention is fully described in the following specification, and while, in its broader aspect, it is capable of embodiment in numerous forms, a preferred embodiment thereof is illustrated in the accompanying drawings, in which-- l Fig. 1 is a central vertical section of an air-brush embodying. the invention, with parts in full. Fig. 2 is a horizontal section on the line 2--2 in Fig. 1. Fig. 3 is `ari outer end View of the liquid discharge nozzle. Fig. 4 is a reduced perspective view of the stock, or body member, of the device, and Fig. 5 is a reduced side elevation of the spray parte removed from the stock or body member.

Referring to the drawings, 1 designates the stock or body member of an air-brush embodying the invention, such stock being provided at its rear end with a downwardly and rearwardly projecting extension 2, which terminates at its rear end in a stud portion 3, on which the upper socketed end of a handle member 4 is mounted. A. nut 5 threads onto the rear end of the stud 3 to clamp the soclreted portion of the handle against a shoulder 6 at the forward end of the stud. The forward end portion of the extension 2 and the lower rear end portion of the body 1 are provided with a vertically disposed slot or opening 7 in the plane of the longitudinal axis of the handle 4, and a trigger member 8 is mounted in this opening on a pivot 9 for the purpose hereinafter de-y scribed. The pivotal movements of the trigger are longitudinal to thebody 1, 'and its lower end projects downward in engaging position below said body and in front ofthe handle 4.

A boss 10 is formed on the bottom edge of the forward end' portion of the stock or body 1 in advance or the extension 2, and is provided longitudinally therethrough with an opening 1l in axial register with an opening 12 provided longitudinally through the stud 3. The bottoni wall of the opening 11 is slotted fora distance back from its forward end, as shown at 13 in Fig. 4, and the rear end portion of the slot is provided with 'a tapered segmental marginal flange 14, which projects downward from the boss A spray-head body part 15 is adapted to have its rear end portion removably projected through the opening 1l in the boss 10 and to be securely mounted therein. 'The tubular stem 16 projects downward from the lower side of the part 15 through the slot 13 in the boss l() and has a nut 17 threaded thereon. 'llhis nut is flanged at its upper ory inner side to adapt it, when screwed home, to engage the tapered surface of the marginal nangel4 of the slot wail to prevent an outward removal of the spray-head body l5 from engagement with the stock 11, and also to cause a close seating of the body 1.5 l

against the nipple 44. lhe nipple 16 is adaptedto be connected to a source of supply of paint, or other material to be sprayed, and its passageway 18 continues forwardly through the part 15 to its forward end.

An inner or material spraying nozzle 20, which for convenience may be termed the liquid nozzle, is seated at its inner end against theV forward end of the spray-head part 15, and has a conical or forwardly reduced bore 21 axially therethrough, the rear enlarged end of which bore axially registers with and, in the present instance, is of the same size as the passage 18. The forward end of the nozzle bore; 21 terminates in a small or restricted discharge oriiic'e 22 (Fig. 3). rJlhe outer side of the nozzle 20 is tapered, or conically reduced, from near its mit forward end thereof it is provided' with a cylindrical projection 25 co-axial with the orifice 22. The outer surface of the nozzle 2O is provided, in the present instance, with four longitudinally extending grooves 26 for the purpose hereinafter described. The nozzle 2O is prevented from turning relative to the part 15, against which it seats, by a pin 27 projecting from said part and into one of the grooves 26. The nozzle 2O is held lirmly to the ward end portion of the part 15 and has its forward end'in flanged engagement with the flange 24 of the nozzle.

An air nozzle 30 is rotatably mounted on the conical portion 23 of thenozzle 20 andv has its forwardend portion encircling the projection 25 of the nozzle 42O in slightlyspaced relation thereto to provide an annular air discharge passage between saidparts. The seating of the air nozzle 30 on the conical portion 23 causes the discharge passage or orifice of the air nozzleto be in true concentric relation to the projection 25 of the nozzle 20. The bore of the .air nozzle is complemental to the conical surface 23 of the nozzle 20 so as to have valve seating engagement therewith; The air nozzle 30 is rotatably retained on the nozzle 20 by a union 31, which h'as flanged engagement with the rear end of fthe nozzle 30 and threads over the enlarged forward end portion 15a of the part 15. The air nozzle 30 is provided at opposite sides thereof in diametrically opposed relation with outwardly and forwardly' rojecting arms` 32, having angled air disc arge passages 33 therein which communicate at their inner ends with the interior bore of the air nozzle and have their outerends disposed to ,discharge air therefrom acrss the path of discharge of material'from the nozzle 2O slightly in ad- Vance `of the nozzle. The air nozzle may be turned to place the innerends of. the air passages 33 in communication, with opposed grooves 26 in the nozzle 20, or the air nozzel may be turned to dispose the passage 23 intermediate the grooves to prevent the passage of air through said passages.

The stock 1 is provided with an air chamber 35, in communication through a side nipple 36 (Fig. 2) Awith a sou'ce of air pressure supply, and this chamber is in communication with the grooves 26 in the liquid nozzle 20 through

passages

37 and 38 provided, respectively, in communicating .relation in the stock l and enlargement 15a of the part 15. The passage 38opens into the space39 between the inner portion of the air nozzle 30 and the vunion 28, which space is in communication with the liquid nozzle grooves 26. A valve 40 normally closes the outlet from the chamber 35 to the passage 37 and has a stem 41 projecting rearwardforward end of the part 15 by a union 428, which is threaded over the fon' neiaaee ly therefrom and provided with an enlargement 42 at its re'ar end which is guided for reciprocatory movements in 'a part of the stock 1 and has its rear end entering 'the stock opening 7 in position to be engaged by a linger 43 on the trigger 8,- whereby a.-

from, as is Well understood inthe art. When the air nozzle passages. 33 are in communication with the grooves 26, a portion of the air will be discharged through said passages and laterally against the stream of air and material discharging from the center orilices of the two nozzles, thereby fiattening the stream in fan form.

A nipple 44 projects from the forward-end of the passage 37 and is adapted to remov.

ably seat in the rear end of the passage 38 when the spray-head part 15 is mounted in the boss 10. l

A conical needle form of valve 45 seats in the forward restricted endportion of the liquid nozzle 20 and,has its stem portion projecting .rearwardly axially through the horizontal portion of the passage 18, thence through a bearing in the rear end of the part 15 and through a stuffing box 4 6 mountcd on said part. The stem'then extends into the stock opening 7 through a slotI Li7 in the trigger 8 and into abutment at itsrear end with a spring pressed plunger 48 that is mounted for axial movements in a socketed stud 49`that is 'adjustably threaded in the opening 12 Vof the stock boss 3.v A coiled compression spring 50 is disposed within ment withit and the plunger48, tending to normally hold the valve 45 seated. The

-trigger 8 is provided in advance thereof near `largement 52` on the stem whereby a rearward movement of the .trigger imparts' an opening movement to the valve.

One of the important features of our airbrush is the ease with which the stock and spray-head parts thereof may be separated and'assembled, thus facilitating cleaning and repairing of the parts. To release the parts,

the operator merely turns the nut 17 down on the` stem 16 to.disengage ythe flange 14, and is then permitted to draw the part 15 and the spraying parts attached thereto `130 fromv the stock; In doing this, the' valve the stud 49 in opposed end-'thrust engage remains in connection with the part 15, the trigger 8 swinging forward to permit the enlargement 52 to pass forward from engagement with the fingers 5l. It is thus apparent that the parts which are connected respectively to the air and material supply lines are separated from each other and either may be repaired or cleaned as desired. It is also apparent that the air nozzle 30 co-operates with the liquid nozzle 20 to form a valve whereby a turning of one on the other places the auxiliary air passages 33 either' into or out of operative relation to the air supply grooves 2G in the liquid nozzle, thereby enabling the air nozzle to be easily and quickly adjusted to effect either a round or a fan type of spray.

We wish it understood that our invention is not limited by any specific construction, arrangement or form of the parts, as it is capable of numerous modifications and changes without departing from the spirit of the claims.

Having thus described our invention, what we claim as new, and useful by Letters Patent, is: i

l. ln an instrument of the class described, a body unit having` an air supply passage adapted to be placed in communication with a source of air pressure supply, a valve` normally closing said passage, a spray-head unit detachably carried by the body unit at one side of the forward end portion thereof and passages, the former in communication with the air supply passage of the body unit, a valve controlling the material discharge passage and having a portion projecting rearwardly beyond the rear end of the sprayhead unit, and means adapted to have engagement with the outwardly projecting end portion of said last valve and also with the air control valve and operable to control the opening movements of both of said valves.

:2. ln an instrument of the class described, a body unit having an air supply passage adapted to be'placed in communication with a source of air pressure supply and having a laterally offset rearwardly extending portion provi-ded with a handle, a valve normallyclosing said passage, a spray-head unit detachably carriedl by the body unit at one side thereof and in advance of its said offset rearwardly projecting portion and having a discharge passage for material to be sprayed, and an air discharge passage, the latter adapted to have communication with the air supply passage of the body unit when control means carried by the body unit and operable to open both of said valves.

3. ln an instrument of the class described, a body unit having a valve controlled air supply passage therein, a spray-head unit in` sliding releasable engagement with the body unit and having an air discharge passage in connnunication with the supply passage when the units are assembled, means at one side of the forward end portion of the body unit for releasably retaining the units in assembled relation, said spray-head unit also having a liquid discharge passage, a valve normally closing said liquid discharge passage, and means carried by the body and operable to open the liquid control valve.

Ll. ln an instrument of the class described, the body unit having an air passage portion with a laterally projected extension at one side adjacent to its forward end and with a handle portion at its rear end, said unit having a valve controlled air supply passage therein, a spray-head unit adapted to be releasably engaged with said lateral projection and having concentric air'and liquid discharge passages wit-h the air passage in communication with the air supply passage of the body unit when the two units are assembled and with the liquid passage adapted to have communication with a source of liquid supply, means for releasably securing the spray-head unit to the body unit and its lateral projection, a valve normally closing the liquid discharge passage and having a stem portion project-ing rearwardly from the spray-head unit, and means operable to open said valve.

5. In a device of the class described, a body member having a handle projecting therefrom and having an air supply passage, said member having a slotted part at one side thereof in advance of the handle, a valve in said passage, a spray-head unit having a part in releasable engagement with the slotted part of the body member and having an air discharge passage in communication with the air supply passage and also having a material discharge passage, means releasably securing said member and unit in assembled relation, a control valve for the material discharge carried by said unit, and a unitary control means for the air and material control valves carried by the bodv member. u

6. ln an instrument of the class described, a body member having an air supply passage in its forward portion and having a laterally offset rearward extension terminating in a rearwardly projecting boss, a han-- die detachably mounted on said boss, a valve in said air passage, a spray-head means detachably carried by the body member in line with said boss and having an air discharge passage in communication with the first passage and a material discharge passage, a'

'side thereof and having an air normally closed valve controlling said latter passage and projecting into said boss, and control means for both lsaid valves carried by thebody member.

7 In an instrument of the class described, a body member having an air supply passage in its forward portion and a. rearwardly projecting, laterally offset extension at its rearward portion terminating in a rearwardly extending boss, a kvalve in said passage, a handle mounted onl said boss, a spray-head means carried by the body member at one discharge passage in communication with said first passage and a material discharge passage,fa valve for controlling said latter passage, said valve having a stein projecting rearwardly from the spray-head means toward said boss, adjustable tension 'means mounted in the boss and acting on the valve stem to normally retain the ,valve closed, and a control member carried by the body member and operable to acton the air valve and on said stem to open both valves.

8. In an instrument of the class described, inner and outer nozzles having concentric discharge orifices and one having a conical bearing on the other to retain the orifices in concentric relation and to permit rotary adjustment of one on the other, the outer nozzle having lateral 'air discharge passages, and provision in the conical bearing for the supply ofv air from a supply source to the outer discharge orifice and also to the lateral discharge passages spray when theouter nozzle is in predetermined positions only of adjustment on the inner nozzle.

9. In an `instrument of the class described, inner and outer nozzles, one having a conical seat on the other for relative rotary adjustment, the inner nozzle having a central 'material discharge orifice and the outer` nozzle cooperating with the tip end portion of the inner nozzle toform an annular air dischargg orifice, the inner nozzle having a plurality of longitudinally extending surface grooves in its conical portion communicating at their forward ends with said annular orifice and at their rear ends with a source of air pressure supply, said outernozzle having lateral air discharge passages adapted to be placed into or out of registering communication with predetermined grooves of said inner nozzle when one nozzle is turned on the other.V

10. In^- an instrument of the class defory producing a fan lsuch ,assembled relation,

with the forward end portion of the liquid nozzle to form an annular air discharge passage and withsaid grooves to form air'passages zle also having lateral air discharge passages adapted to be placed into or out of registering communication with predetermined grooves 1n said liquid nozzle when one nozzle is turned on the other, a-valve for said liquid discharge passage, and.` valve controlled. ine-ans for supplying air to the passages forined by said grooves.

l1. In` an instrumentA of the class described, an inner liquid nozzle having a discharge orifice and an outer conical surface portion, and an outer nozzle having a discharge orifice surrounding and concentric to and entirely enveloping the discharge orifice of the inner nozzle and having an inner conical surface rotatably-seating on the conical surfacey of the inner nozzle to maintain the discharge orifices of the two nozzles in concentric relation, means for securing the two nozzles in such assembled relation, said nozzles having provision between their coacting conical surfaces to supply air from a supply source to the Iouter discharge orifice.

l2. In an instrument 'of the class described, an inner nozzle having a discharge orifice and an outer conical bearing surface portion, and an outer nozzle having a discharge rifice surrounding and concentric to the discharge orifice of the inner nozzle and having an inner conical bearing surface f rotatably seating on the co -cal surfaceof the inner nozzle to maintain e discharge orifices of the two nozzles in concentric relation, means for securing the two nozzles in said nozzles havin provision between their` coacting conici bearing surfaces to supply air from a supply source to the outer discharge orifice, and said vouter nozzle having lateral air discharge passages adapted to be placed into or out of registering communication with the air passing between the two nozzles when one nozzle is turned on the other.

' In testimony whereof we havehereunto signed our naines to this specification.

WILLIAM F. GRADOLPI-I. GODFREY MUELLER.

v leading to said oriiiee,'said second noz-