US2886252A - Spray gun - Google Patents

Spray gun Download PDF

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Publication number
US2886252A
US2886252A US574710A US57471056A US2886252A US 2886252 A US2886252 A US 2886252A US 574710 A US574710 A US 574710A US 57471056 A US57471056 A US 57471056A US 2886252 A US2886252 A US 2886252A
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Prior art keywords
nozzle
air
gun
spray
pin
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Expired - Lifetime
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US574710A
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Ehrensperger Carl
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Ehrensperger Carl
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2478Gun with a container which, in normal use, is located above the gun
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02Spray pistols; Apparatus for discharge
    • B05B7/12Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404Arrangements for supplying particulate material
    • B05B7/1413Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising a container fixed to the discharge device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2405Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
    • B05B7/2435Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle the carried liquid and the main stream of atomising fluid being brought together by parallel conduits placed one inside the other
    • B05B7/2437Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle the carried liquid and the main stream of atomising fluid being brought together by parallel conduits placed one inside the other and a secondary stream of atomising fluid being brought together in the container or putting the carried fluid under pressure in the container

Description

May 12, 1959 rvr C. EHRENSPERGER SPRAY 'GUN Filed March 29, 1956 4 INVENTOR;

C A R L E H R E NS P E R G E R BY M, WJ M 4me/f.

United States Patent SPRAY GUN Crl Ehrensperger, Zurich, Switzerland Application March 29, 1956, Serial No. 574,710

Claims priority, application Switzerland March 30, 1955 3 Claims. (Cl. 239-354) Thisinvention relates to pneumatically operated spray guns for spraying at low pressures more or less viscous materials, particularly plastic materials with or without additions of llers, such as fibrous substances, sand-sawdust, plastic inserts, etc.

In spray guns of the above type, the low pressure com* pressed air serves, on the one hand for ejecting the material from the spray container, and on the other hand for shredding or atomizing the spraying material to be forced out through a nozzle.

It is an object of the invention to provide a spray gun capable of producing various pattern effects of the material sprayed upon a base, such as wall surfaces, ceilings, etc., by changing the amount of air supplied to the spray nozzle, or else by interrupting the air supply almost entirely in certain applications. In the latter case, however, the pressure exerted upon the spraying material enclosed in the container must be maintained to an extent required for pressing the material through the spraying nozzle. y

According to the invention the spray gun comprises a case provided with a handle and including in its forward portion an inserted nozzle body which is interposed in the air current and connected with the receptacle containing the spraying material. The invention also provides a control member for the compressed air, which is adjust ably arranged in the said case between the conduit connection for the supply of compressed air to the spraying material container, disposed at the rear portion of the gun case, and the said nozzle body, said control member enabling to throttle at will the air stream ilowing to the nozzle body, while maintaining the air pressure exerted upon the spraying material provided in the container.

It is a further object of the invention to provide a spray gun, of which the nozzle body may comprise two or more interchangeable nozzles and associated nozzle pins, so that the spray gun may be used for spraying more fluid plastic masses, as well as plastic masses having incorporated therein coarser additions, such as e.g. brous material.

Other objects and advantages of the invention will become apparent from the following detailed description ICC An insert member 4 is arranged in the cylindrical portion 1 ofthe gun case. l This insert member is of smaller diameter than said cylindrical portion and is surrounded by the stream of the compressed air supplied through the handle part 2; and the member 4 is provided with longitudinal ribs 5 for guiding the surrounding air flow and with an internal hollow space 6, which is connected to the spraying material container 8 by rmeans of a pipe nipple 7. The insert member 4 is securely connected to the gun case by the said nipple, which extends through the wall of the case 1 and is screwed into said insert.

The container for the spraying material is closed at the top by a cover 9. The space within said container above the level of the spraying material communicates with the compressed air nipple by means of a conduit 10 connected to the gun case 1 through a throttle valve 11.

An air-regulating sleeve 12 movable in longitudinal direction is built into the handle part 2. The length of travel of this sleeve is limited by a stop screw 13 which is screwed into the sleeve 12 and engages a slot of the handle 2. A longitudinal slot 14 provided at the upper taken in connection with the accompanying drawings, in p which: g

Fig. 1 is a side elevation of the spray gun,

Fig. 2 shows a part sectional view of the gun,

Fig. 3 is a section on the line III-III of Fig. 2,

Figs. 4 and 5 show each a longitudinal section of different nozzle arrangements to be used with the spray gun according to the invention, and

Fig. 6 is an end elevation View of the spraying nozzle, looking in the direction of the arrow in Fig. 4.

Referring to the drawings, the illustrated gun comprises a gun case having an essentially cylindrical upper portion 1, and downwardly inclined from this portion a handle part 2 with a hand support 3 cast integrally with said case, said handle part Ibeing formed as pipe branch for the connection of the compressed air tube.

end of the sleeve 12 permits movement of the sleeve upwardly over the nozzle pin 15 until it abuts against the top wall of the cylindrical case, so as to control the air flow to the insert member 4, but nevertheless allows the application of full or regulable air pressure upon the spraying in the container 8 through the conduit 10. This control action on the air stream directed towards the nozzle outlet my be used for achieving particular pattern effects, since with reduced flow of air the spraying material is no longer atomized, but only shredded.

The insert member 4 is adapted for the reception of two different nozzles and nozzle pins dependent on the nature of the spraying material to be used. According to Fig. 4, a nozzle 16 having a relatively small opening is screwed into the forward portion of the insert member 4. For the purpose of regulating the discharge of the spraying material, the nozzle pin 15 having a conical extremity coacts with the opening of the nozzle. The nozzle pin iS guided for longitudinal movement in a terminal plug 17 of the insert member 4 and in a screw plug 18 disposed at the rear .end of the gwn case 1. The back end of the valve pin 15 passes through the screw plug 18 and out of the gun case 1. Within the case 1 the pin 15 carries an adjustable stop 19 for the one end of a spring 20, of which the other end bears against the screw plug 18. The spring 20 acts to press the conical end of the nozzle pin into the nozzle opening.

Outside of the gun case,y the nozzle pin is engaged by a U-shaped bracket 21 which is secured to the pin by means of a set screw 22. The bracket 21 extends forwardly with its two legs positioned along the case 1, and the ends of the legs are linked to the trigger lever 23 embracing the case by means of a lforked portion, said lever being mounted on a pivot pin 24. Upon retraction of the trigger lever 23, the nozzle pin is moved against the action of the spring 20, so that the conical end of the pin clears the opening of the nozzle and the content of the spraying material container is forced out to the nozzle under compressed air pressure. i

In order to limit the opening motion of the nozzle 15, the case 1 is provided with a stop screw 25 which limits the swinging movement of trigger lever 23 by bearing against a surface 26 of the lever.

A packing 27 is provided and retained by the terminal plug 17 in order to seal the zone where the nozzle pin 15 passes out of the insert member 4. On the nozzle end of the gun case an air cap 29 is mounted by means of an annular nut 28. y

The pin and nozzle arrangement 15, 16 shown in Fig. 4 serves for spraying more tlud and more pure plastic assaasa masses, such as dispersions, oily plastic materials, ne sand plastic, stone enamel, etc.

Moreover, by using smaller nozzles than the nozzle 16 shown` in Fig. 4 and'by means of a suitable customary spraying head, there can also be sprayed ordinary paints, lacquers, dispersions, emulsions, size colors, lime, etc.

The nozzle arrangement according to Fig. 5 has the same insert member 4 as the arrangement shown in Fig. l. The nozzle 3?, however, is provided with a bore of 'greater diameter than the one shown in Fig. 4. The

nozzle pin 15 has the same diameter as the pin in Fig. 4, but is provided with an enlarged pin head 31 cooperating with the rear end portion of the nozzle opening. When the nozzle pin is pulled to the rear by means of the'trigger lever 23, then the headV 31, as shown in dotted lines, opens the entire cross section of the nozzle opening for the passage of the spraying material. This nozzle arrangement is used for spraying fibrous plastics, coarse sand plastics or plastic masses having similar coarse additions, which require an unobstructed flow passage.

As is evident from Figs. 2 and 5, the lateral guiding ribs 5 of the insert member 4 are inclined or helically arranged with respect to the longitudinal axis of the cylindrical case 1, for the purpose'of obtaining a uniform distribution of air on the head of the nozzle around the entire circumference of the head. The insert member 4 is provided with an eye 32 for screwing the connecting nipple 7 in place. This eye prevents the air from streaming in longitudinal direction of the upper portion of the insert 4, so that without provision of guiding ribs 5 there would exist an air stream which would be weaker on the top side of the nozzle outlet than on the bottom side thereof. For this reason the entrance section for air, between the rear edges 5a of both lateral ribs 5 and the rear edge of the eye 32, is greater than the section provided between the two edges 5a of the lateral rib and the rearward edge of the lower rib 5. In this manner more air is passed to the upper side of the nozzle than without inclined lateral ribs, so that the air flow is substantially uniform around the entire circumference of the nozzle, and uniform effects of the sprayed material are assured.

As an air source for producing the required air stream or air pressure, any desired source of low pressure compressed air producing the necessary operating pressure may be used, such for instance as a compressor, a fan, or only the blower of a vacuum cleaner.

The spray gun permits the obtaining of the finest lacquer layers and as well a great variety of pattern effects by the use of plastic materials. ,1

While I have shown a preferred practical embodiment of my improved spray gun, it will be understood that various changes and modifications may be made without departing from the spirit of my invention or the Scope of the appended claims.

What l claim is:

l. A spray gun for spraying iluid materials of different viscosity by means of low pressure compressed air, comprising a gun case, a gun handle forming part of said case and having an air passage therethrough, a spray nozzle carrying member having a spray nozzle opening therein mounted in the forward part of said gun casing, a retractable nozzle pin having a head corresponding to the size of said spray nozzle opening for controlling the spray nozzle opening in said carrying member, a receptacle for the material to be sprayed mounted on the gun body and communicating with said nozzle carrying member, an air conduit leading from the rear portion of the gun casing to the top of said receptacle, and an air distributing member movably mounted in said gun handle movable transversely of said gun casing independently of said spray nozzle pin for controlling the amount of air owing in said gun casing between said conduit and said nozzle carrying member, said air distributing member having a longitudinal slot therein slidable over the nozzle pin traversing the gun casing whereby the air directed to said nozzle carrying member may be controlled while maintaining the air pressure acting through the air conduit leading to said receptacle.

2. A spray gun as claimed in claim l, wherein said air distributing member is formed as hollow sleeve slidably guided in the gun handle portion and adapted to project into the gun casing between said nozzle carrying member and said air conduit leading to the spray material receptacle.

3. A spray gun as claimed in claim l, in which said nozzle pin head is enlarged and said spray nozzle carrying member has a hollow space in the end opposite to the end having the spray nozzie opening therein, the point at which said receptacle communicates with said spray nozzle carrying member being between said spray nozzle opening and said hollow space, said hollow space being of a size to accommodate said nozzle pin head, whereby when said nozzle pin is withdrawn until the nozzle pin head is located in said hollow space said head does not interfere with the flow of spraying material to the nozzle opening.

References Cited in the tile of this patent UNITED STATES PATENTS

US574710A 1955-03-30 1956-03-29 Spray gun Expired - Lifetime US2886252A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH2886252X 1955-03-30

Publications (1)

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US2886252A true US2886252A (en) 1959-05-12

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US574710A Expired - Lifetime US2886252A (en) 1955-03-30 1956-03-29 Spray gun

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CH (1) CH332925A (en)
FR (1) FR1144901A (en)
NL (1) NL205691A (en)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4335677A (en) * 1979-10-25 1982-06-22 Sumitomo Light Metal Industries, Ltd. Coating of the inner surface of tubes
US4948054A (en) * 1989-03-07 1990-08-14 Behr Process Corporation Pneumatic drywall texture bazooka
US5069389A (en) * 1988-10-31 1991-12-03 Constantine Bitsakos Adapter for an air spray paint gun
US5119992A (en) * 1991-02-11 1992-06-09 Ransburg Corporation Spray gun with regulated pressure feed paint cup
US5979797A (en) * 1998-08-14 1999-11-09 Castellano; Michael A. Handheld pressurized hopper gun and method
US6062494A (en) * 1997-08-26 2000-05-16 Spraytex, Inc. Drywall texture sprayer
US20030164408A1 (en) * 2000-06-30 2003-09-04 Ewald Schmon Spray pistol
US20080078849A1 (en) * 2006-09-30 2008-04-03 Fox Jeffrey D Disposable spray gun cartridge
US20080257987A1 (en) * 2007-04-19 2008-10-23 Eran Zagorsky Atomizer adapter for paint sprayer
US20100170964A1 (en) * 2008-04-28 2010-07-08 Gennadi Fedorov Spraying device apparatus
US20110174901A1 (en) * 2008-10-29 2011-07-21 Peter Dettlaff Gravity cup for a paint sprayer
US20110284665A1 (en) * 2008-04-28 2011-11-24 Temptu, Inc. Spraying device apparatus
USD740393S1 (en) 2013-09-27 2015-10-06 Sata Gmbh & Co. Kg Paint spray gun
US9327301B2 (en) 2008-03-12 2016-05-03 Jeffrey D. Fox Disposable spray gun cartridge
USD758537S1 (en) 2014-07-31 2016-06-07 Sata Gmbh & Co. Kg Paint spray gun rear portion
US9358561B2 (en) 2011-07-28 2016-06-07 3M Innovative Properties Company Spray head assembly with integrated air cap/nozzle for a liquid spray gun
US9409197B2 (en) 2013-12-18 2016-08-09 Sata Gmbh & Co. Kg Air nozzle closure for a spray gun
USD768820S1 (en) 2014-09-03 2016-10-11 Sata Gmbh & Co. Kg Paint spray gun with pattern
USD770593S1 (en) 2014-07-31 2016-11-01 Sata Gmbh & Co. Kg Paint spray gun
US9533317B2 (en) 2009-07-08 2017-01-03 Sata Gmbh & Co. Kg Paint spray gun
US9751100B2 (en) 2011-02-09 2017-09-05 3M Innovative Properties Company Nozzle tips and spray head assemblies for liquid spray guns
US9782785B2 (en) 2010-12-02 2017-10-10 Sata Gmbh & Co. Kg Spray gun and accessories
US9782784B2 (en) 2010-05-28 2017-10-10 Sata Gmbh & Co. Kg Nozzle head for a spray device
US9802213B2 (en) 2012-03-06 2017-10-31 3M Innovative Properties Company Spray gun having internal boost passageway
US9802211B2 (en) 2011-10-12 2017-10-31 3M Innovative Properties Company Spray head assemblies for liquid spray guns
US9878336B2 (en) 2006-12-05 2018-01-30 Sata Gmbh & Co. Kg Fluid reservoir for a paint spray gun
US10071388B2 (en) 2009-01-26 2018-09-11 3M Innovative Properties Company Liquid spray gun, spray gun platform, and spray head assembly
US10189037B2 (en) 2011-06-30 2019-01-29 Sata Gmbh & Co. Kg Easy-to-clean spray gun, accessories therefor, and mounting and dismounting methods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3181798A (en) * 1962-07-18 1965-05-04 Spraying Systems Co Airless spray gun having spray and valve safety means

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1488125A (en) * 1923-01-22 1924-03-25 Alvin H Kline Sprayer
US2656217A (en) * 1950-07-27 1953-10-20 Roche Andre Low-pressure spray gun
DE914351C (en) * 1951-11-22 1954-07-01 Gottlieb Notz Low-pressure spray gun
US2737415A (en) * 1953-01-29 1956-03-06 Elsa Wheeler Nicholson Paint spray gun

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1488125A (en) * 1923-01-22 1924-03-25 Alvin H Kline Sprayer
US2656217A (en) * 1950-07-27 1953-10-20 Roche Andre Low-pressure spray gun
DE914351C (en) * 1951-11-22 1954-07-01 Gottlieb Notz Low-pressure spray gun
US2737415A (en) * 1953-01-29 1956-03-06 Elsa Wheeler Nicholson Paint spray gun

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4335677A (en) * 1979-10-25 1982-06-22 Sumitomo Light Metal Industries, Ltd. Coating of the inner surface of tubes
US5069389A (en) * 1988-10-31 1991-12-03 Constantine Bitsakos Adapter for an air spray paint gun
US4948054A (en) * 1989-03-07 1990-08-14 Behr Process Corporation Pneumatic drywall texture bazooka
US5119992A (en) * 1991-02-11 1992-06-09 Ransburg Corporation Spray gun with regulated pressure feed paint cup
US6062494A (en) * 1997-08-26 2000-05-16 Spraytex, Inc. Drywall texture sprayer
US5979797A (en) * 1998-08-14 1999-11-09 Castellano; Michael A. Handheld pressurized hopper gun and method
US20030164408A1 (en) * 2000-06-30 2003-09-04 Ewald Schmon Spray pistol
US6845924B2 (en) * 2000-06-30 2005-01-25 Sata-Farbspritztechnik Gmbh & Co. Kg Spray pistol
US20080078849A1 (en) * 2006-09-30 2008-04-03 Fox Jeffrey D Disposable spray gun cartridge
US9878336B2 (en) 2006-12-05 2018-01-30 Sata Gmbh & Co. Kg Fluid reservoir for a paint spray gun
US7922105B2 (en) * 2007-04-19 2011-04-12 Benron Equipment And Supply, Inc. Atomizer adapter for paint sprayer
US20080257987A1 (en) * 2007-04-19 2008-10-23 Eran Zagorsky Atomizer adapter for paint sprayer
US9327301B2 (en) 2008-03-12 2016-05-03 Jeffrey D. Fox Disposable spray gun cartridge
US20100170964A1 (en) * 2008-04-28 2010-07-08 Gennadi Fedorov Spraying device apparatus
US20110284665A1 (en) * 2008-04-28 2011-11-24 Temptu, Inc. Spraying device apparatus
US20110284664A1 (en) * 2008-04-28 2011-11-24 Temptu, Inc Spraying device apparatus
US8091804B2 (en) * 2008-04-28 2012-01-10 Temptu, Inc. Spraying device apparatus
US9056324B2 (en) * 2008-04-28 2015-06-16 Temptu Inc. Spraying device apparatus
US9061295B2 (en) * 2008-04-28 2015-06-23 Temptu Inc. Spraying device apparatus
US20150250288A1 (en) * 2008-04-28 2015-09-10 Temptu, Inc. Spraying device apparatus
US10264868B2 (en) * 2008-04-28 2019-04-23 Temptu, Inc. Spraying device apparatus
US8925836B2 (en) 2008-10-29 2015-01-06 Sata Gmbh & Co. Kg Gravity cup for a paint sprayer
US20110174901A1 (en) * 2008-10-29 2011-07-21 Peter Dettlaff Gravity cup for a paint sprayer
US10071388B2 (en) 2009-01-26 2018-09-11 3M Innovative Properties Company Liquid spray gun, spray gun platform, and spray head assembly
US9533317B2 (en) 2009-07-08 2017-01-03 Sata Gmbh & Co. Kg Paint spray gun
US9782784B2 (en) 2010-05-28 2017-10-10 Sata Gmbh & Co. Kg Nozzle head for a spray device
US9782785B2 (en) 2010-12-02 2017-10-10 Sata Gmbh & Co. Kg Spray gun and accessories
US9751100B2 (en) 2011-02-09 2017-09-05 3M Innovative Properties Company Nozzle tips and spray head assemblies for liquid spray guns
US10189037B2 (en) 2011-06-30 2019-01-29 Sata Gmbh & Co. Kg Easy-to-clean spray gun, accessories therefor, and mounting and dismounting methods
US9358561B2 (en) 2011-07-28 2016-06-07 3M Innovative Properties Company Spray head assembly with integrated air cap/nozzle for a liquid spray gun
US9802211B2 (en) 2011-10-12 2017-10-31 3M Innovative Properties Company Spray head assemblies for liquid spray guns
US9802213B2 (en) 2012-03-06 2017-10-31 3M Innovative Properties Company Spray gun having internal boost passageway
USD740393S1 (en) 2013-09-27 2015-10-06 Sata Gmbh & Co. Kg Paint spray gun
US9409197B2 (en) 2013-12-18 2016-08-09 Sata Gmbh & Co. Kg Air nozzle closure for a spray gun
USD770593S1 (en) 2014-07-31 2016-11-01 Sata Gmbh & Co. Kg Paint spray gun
USD835235S1 (en) 2014-07-31 2018-12-04 Sata Gmbh & Co. Kg Paint spray gun
USD758537S1 (en) 2014-07-31 2016-06-07 Sata Gmbh & Co. Kg Paint spray gun rear portion
USD798419S1 (en) 2014-07-31 2017-09-26 Sata Gmbh & Co. Kg Paint spray gun
USD768820S1 (en) 2014-09-03 2016-10-11 Sata Gmbh & Co. Kg Paint spray gun with pattern

Also Published As

Publication number Publication date
FR1144901A (en) 1957-10-18
CH332925A (en) 1958-09-30
NL205691A (en)

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