Spray gun and nozzle assembly attachment

Patent metadata

Field	Value
Publication number	US-11229921-B2
Application number	US-201716466712-A
Country	US
Kind code	B2
Filing date	Dec 5, 2017
Priority date	Dec 6, 2016
Publication date	Jan 25, 2022
Grant date	Jan 25, 2022

Abstract

A liquid spray gun nozzle assembly is disclosed comprising a spray gun connection portion opposite a coating liquid outlet portion adapted to connect the liquid spray gun nozzle assembly to a compatible liquid spray gun body, the spray gun connection portion comprising an outer wall comprising a radially-outward facing surface; first and second camming members disposed on the radially-outward facing surface, each camming member comprising first end, a second end, and a camming surface facing the coating liquid outlet portion; a first access window separating the first end of the first camming member from the second end of the second camming member; and a second access window separating the first end of the second camming member from the second end of the first camming member.

First claim

What is claimed is:

1. A liquid spray gun nozzle assembly comprising
a coating liquid inlet portion comprising a liquid connector for connection to an external liquid source;
a coating liquid outlet portion comprising a liquid nozzle for spraying a coating liquid fed into the nozzle assembly through the coating liquid inlet portion, the liquid nozzle being disposed along a spray axis;
a coating liquid flow path fluidly connecting the coating liquid inlet portion to the liquid nozzle;
a spray gun connection portion opposite the coating liquid outlet portion adapted to connect the liquid spray gun nozzle assembly to a compatible liquid spray gun body, the spray gun connection portion comprising
an outer wall comprising a radially-outward facing surface;
a first camming member disposed on the radially-outward facing surface and comprising a first end, a second end, and a first camming surface facing the coating liquid outlet portion;
a first access window proximate the first end of the first camming member,
wherein the first camming surface is adapted to interact with a complementary camming lug on the compatible liquid spray gun body to pull the liquid spray gun nozzle assembly along the spray axis and against the compatible liquid spray gun body without rotation of the liquid spray gun nozzle assembly.

2. The liquid spray gun nozzle assembly of claim 1 wherein the spray gun connection portion further comprises
a second camming member comprising a first end, a second end, and a second camming surface facing the coating liquid outlet portion; wherein the first access window separates the first end of the first camming member from the second end of the second camming member; and
a second access window separating the first end of the second camming member from the second end of the first camming member.

3. The liquid spray gun nozzle assembly of claim 2 wherein the second camming surface comprises a portion that is inclined relative to a base plane defined normally to the spray axis.

4. The liquid spray gun nozzle assembly of claim 1 wherein the liquid connector comprises a quick-connect coupler.

5. The liquid spray gun nozzle assembly of claim 1 wherein the first camming surface comprises a portion that is inclined relative to a base plane defined normally to the spray axis.

6. The liquid spray gun nozzle assembly of claim 1 wherein the spray gun connection portion comprises a nozzle assembly sealing surface adapted to seal the liquid spray gun nozzle assembly to the compatible liquid spray gun body.

7. The liquid spray gun nozzle assembly of claim 6 wherein the nozzle assembly sealing surface comprises first and second sealing members that are each circular and concentric with one another.

8. The liquid spray gun nozzle assembly of claim 7 wherein the first and second sealing members are concentric about the spray axis.

9. The liquid spray gun nozzle assembly of claim 7 wherein the nozzle assembly sealing surface comprises a third sealing member that is circular and concentric with the first and second sealing members.

10. A liquid spray gun assembly comprising
a liquid spray gun body; and
a liquid spray gun nozzle assembly according to claim 1 .

11. The liquid spray gun assembly of claim 10 wherein the liquid spray gun body comprises a captured rotatable locking ring for connection of the liquid spray gun nozzle assembly.

12. The liquid spray gun assembly of claim 11 , wherein the spray gun connection portion further comprises
a second camming member comprising a first end, a second end, and a second camming surface facing the coating liquid outlet portion; wherein the first access window separates the first end of the first camming member from the second end of the second camming member; and
a second access window separating the first end of the second camming member from the second end of the first camming member;
wherein the captured rotatable locking ring comprises first and second camming lugs adapted to interact with the first and second camming surfaces on the liquid spray gun nozzle assembly.

13. The liquid spray gun assembly of claim 12 wherein the captured rotatable locking ring is rotatable about the spray axis to an assembly position and a locked position, wherein,
in the assembly position, the first and second camming lugs are aligned with the first and second access windows, respectively, to allow installation or removal of the liquid spray gun nozzle assembly; and
in the locked position, the first and second camming lugs bear against the first and second camming surfaces, respectively, to lock the liquid spray gun nozzle assembly against the liquid spray gun body.

14. The liquid spray gun assembly of claim 13 wherein rotation of the captured rotatable locking ring from the assembly position to the locked position is less than 180 degrees about the spray axis.

15. The liquid spray gun assembly of claim 14 wherein rotation of the captured rotatable locking ring from the assembly position to the locked position is less than 140 degrees about the spray axis.

16. The liquid spray gun assembly of claim 11 wherein the captured rotatable locking ring is installable onto the liquid spray gun body by pushing the captured rotatable locking ring along the spray axis, and is removable from the liquid spray gun body by pulling along the spray axis.

17. The liquid spray gun assembly of claim 16 wherein the captured rotatable locking ring is rotatable about the spray axis to an assembly position and a locked position, wherein the captured rotatable locking ring is installable onto and removable from the liquid spray gun body when rotated to the assembly position, but not removable when rotated to the locked position.

18. The liquid spray gun assembly of claim 16 wherein the captured rotatable locking ring is installable and removable from the liquid spray gun body via a snapping feature.

19. The liquid spray gun assembly of claim 16 wherein the captured rotatable locking ring is installable and removable from the liquid spray gun body without the use of a tool.

20. A liquid spray gun body comprising a captured rotatable locking ring adapted to allow connection of a compatible liquid spray gun nozzle assembly,
wherein the liquid spray gun body is free of passages for a coating liquid,
wherein the captured rotatable locking ring comprises a first camming lug adapted to interact with a first camming surface on the compatible liquid spray gun nozzle assembly,
wherein the captured rotatable locking ring comprises a second camming lug adapted to interact with a second camming surface on the compatible liquid spray gun nozzle assembly,
wherein the captured rotatable locking ring is rotatable to an assembly position and a locked position, wherein,
in the assembly position, the compatible liquid spray gun nozzle assembly is installable and removable; and
in the locked position, the compatible liquid spray gun nozzle assembly is lockable against the liquid spray gun body.

21. The liquid spray gun body of claim 20 wherein rotation of the captured rotatable locking ring from the assembly position to the locked position is less than 180 degrees about a spray axis.

22. The liquid spray gun body of claim 21 wherein rotation of the captured rotatable locking ring from the assembly position to the locked position is less than 140 degrees about the spray axis.

23. The liquid spray gun body of claim 20 wherein the captured rotatable l

Assignees

• 3M Innovative Properties Co

Inventors

• Haislet Brady P
• Hayward Bryan J
• Duncan Brian E

Classifications

• B05B7/24 Primary

  with means, e.g. a container, for supplying liquid or other fluent material to a discharge device (B05B7/14, B05B7/16, B05B11/00 take precedence) · CPC title

• B05B9/01

  Spray pistols, {discharge devices}(B05B9/03 takes precedence) · CPC title

• B05B15/65 Primary

  Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits · CPC title