Spray gun having internal boost passageway

Patent metadata

Field	Value
Publication number	US-9802213-B2
Application number	US-201314382988-A
Country	US
Kind code	B2
Filing date	Mar 5, 2013
Priority date	Mar 6, 2012
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A barrel ( 20 ) adapted for use with a spray gun ( 2 ) is disclosed. The barrel ( 20 ) comprises a boost feed port ( 44 ) fluidly connected to a boost passageway ( 48 ), the boost passageway ( 48 ) being integral to the barrel ( 20 ). The boost passageway ( 48 ) is adapted to convey a pressurized boost fluid originating in the spray gun ( 2 ) to a boost delivery port ( 56 ) to assist in urging a coating fluid from a compatible coating fluid reservoir ( 80 ) for spraying by the spray gun ( 2 ).

First claim

What is claimed is:

1. A barrel adapted for use with a gravity fed spray gun, the barrel comprising:
a gun interface adapted to connect the barrel to a gravity fed spray gun platform;
a fluid interface adapted to connect the barrel to a coating fluid reservoir, the fluid interface comprising a fluid port;
a fluid nozzle opening through which a coating fluid to be sprayed can exit the barrel, the fluid nozzle opening being fluidly connected to the fluid port by a fluid passageway formed within the barrel;
wherein the fluid passageway is adapted to convey a coating fluid urged from the compatible coating fluid reservoir out of the fluid nozzle opening for spraying by the gravity fed spray gun;
a boost feed port fluidly connected to a boost passageway, the boost passageway being integral to the barrel;
wherein the boost passageway is adapted to convey a pressurized boost fluid originating in the gravity fed spray gun to a boost delivery port to assist in urging a coating fluid from the compatible coating fluid reservoir for spraying by the gravity fed spray gun.

2. The barrel of claim 1 wherein the fluid interface comprises the boost delivery port.

3. The barrel of claim 1 wherein the boost delivery port is created by connection of the fluid interface to the compatible coating fluid reservoir.

4. The barrel of claim 1 wherein at least a portion of the boost passageway is created by connection of the barrel to the compatible coating fluid reservoir.

5. The barrel of claim 1 wherein the gun interface comprises a coating fluid chamber and the boost feed port is fluidly connected to the coating fluid chamber when the barrel is assembled to the compatible spray gun platform.

6. The barrel of claim 1 wherein the boost passageway is not interrupted by a shut-off device.

7. An assembly comprising a barrel and a coating fluid reservoir adapted for use in combination with a gravity fed spray gun;
the barrel comprising a fluid interface adapted to connect the barrel to the coating fluid reservoir, the fluid interface comprising a fluid port;
a fluid nozzle opening through which a fluid to be sprayed can exit the barrel, the fluid nozzle opening being fluidly connected to the fluid port by a fluid passageway formed within the barrel;
a gun interface adapted to connect the barrel to a gravity fed spray gun platform;
a boost feed port proximate the gun interface;
the coating fluid reservoir being connected to the fluid interface and comprising
a coating fluid chamber fluidly connected to the fluid port; and
a boost fluid chamber fluidly connected to the boost delivery port;
a boost passageway fluidly connecting the boost feed port to a boost delivery port located proximate the fluid interface, the boost passageway being formed within the barrel;

wherein the boost passageway is adapted to convey a pressurized boost fluid originating in the gravity fed spray gun to the boost fluid chamber to assist in urging a fluid in the coating fluid chamber into the fluid passageway and out of the fluid nozzle opening.

8. The assembly of claim 7 wherein the boost passageway is at least partially created by the assembled combination of the barrel and the coating fluid reservoir.

9. The assembly of claim 7 wherein the boost delivery port is integral with the fluid interface, such that the boost passageway is integrally formed as a feature of the barrel.

10. The assembly of claim 7 wherein the coating fluid reservoir comprises a separating member to fluidly separate the coating fluid chamber from the boost fluid chamber.

11. The assembly of claim 7 wherein the boost passageway is not interrupted by a shut-off device.

12. The assembly of claim 7 wherein a fluid in the coating fluid reservoir is prevented from entering the boost passageway regardless of the orientation of the coating fluid reservoir with respect to the barrel.

13. An assembly comprising a barrel and a gravity fed spray gun,
the barrel comprising
a fluid interface adapted to connect the barrel to a coating fluid reservoir, the fluid interface comprising a fluid port;
a fluid nozzle opening through which a fluid to be sprayed can exit the barrel, the fluid nozzle opening being fluidly connected to the fluid port by a fluid passageway formed within the barrel;
a gun interface adapted to connect the barrel to the gravity fed spray gun;
a boost feed port proximate the gun interface and fluidly connected to a boost passageway formed within the barrel;
the gravity fed spray gun comprising a boost port housed within a barrel interface, the gravity fed spray gun being connected to the gun interface at the barrel interface;
wherein the boost passageway is adapted to convey a pressurized boost fluid originating from the boost port to a boost delivery port proximate the fluid interface to assist in urging a fluid in a compatible coating fluid reservoir into the fluid passageway and out of the fluid nozzle opening.

14. A coating fluid reservoir adapted for connection to a compatible barrel of a spray gun, the coating fluid reservoir comprising
a coating fluid chamber; and
a boost fluid chamber separated from the coating fluid chamber by a separating member such that the coating fluid chamber is fluidly isolated from the boost fluid chamber regardless of the orientation of the coating fluid reservoir relative to the spray gun;
a lid member comprising
a reservoir connector for connection of the coating fluid reservoir to a compatible barrel;
a fluid aperture fluidly connected to the coating fluid chamber; and
a boost aperture fluidly connected to the boost fluid chamber;

wherein introduction of a pressurized boost fluid to the boost fluid chamber via the boost aperture causes application of pressure to the coating fluid chamber to urge a fluid in the coating fluid chamber through the fluid aperture.

15. The coating fluid reservoir of claim 14 wherein the fluid aperture comprises a central passage surrounding an aperture axis, and the boost aperture is positioned adjacent the fluid aperture a first distance from the aperture axis.

16. The coating fluid reservoir of claim 14 wherein the boost aperture comprises a at least one aperture surrounding the fluid aperture.

17. The coating fluid reservoir of claim 14 wherein the fluid aperture is defined by an axial passage through a coupling protrusion, the coupling protrusion comprising a protrusion mating surface configured to seal against a compatible barrel of a spray gun.

18. The coating fluid reservoir of claim 17 wherein the boost aperture comprises a plurality of apertures surrounding the coupling protrusion.

19. The coating fluid reservoir of claim 14 wherein the lid member further comprises a reservoir connector comprising a retention member adapted to retain the lid member on a compatible barrel.

20. The coating fluid reservoir of claim 14 wherein the separating member comprises a compressible pouch surrounding the coating fluid chamber.

21. The coating fluid reservoir of claim 14 wherein the boost fluid chamber surrounds the coating fluid chamber.

22. The coating fluid reservoir of claim 14 wherein the boost fluid chamber is surrounded by an outer housing.

23. The coating fluid reservoir of claim 22 wherein the outer housing comprises the lid member and a separable cup member.

24. The coating fluid reservoir of claim 23 wherein the lid member is joined to the separable cup member by a collar.

Assignees

• 3M Innovative Properties Co

Inventors

• Joseph Stephen C P
• Gullicks Scott D
• Blette Russell E
• Qiblawi Jameel R

Classifications

• B05B7/2408

  characterised by the container or its attachment means to the spray apparatus · CPC title

• B05B7/2443

  the carried liquid and the main stream of carrying liquid being brought together downstream of the container before discharge (B05B7/2454 takes precedence) · CPC title

• B05B7/0815

  with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter · CPC title

• B05B7/2478

  Gun with a container which, in normal use, is located above the gun · CPC title

• B05B7/2402

  Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device (B05B7/0012 takes precedence) · CPC title