Plural component spray gun for fast setting materials

Patent metadata

Field	Value
Publication number	US-RE46291-E
Application number	US-200314662864-A
Country	US
Kind code	E1
Filing date	Oct 22, 2003
Priority date	Oct 22, 2002
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A plural component spray gun ( 1 ) is designed for spraying quick setting materials such as foams, polyurea and the like. Towards this end, the gun ( 1 ) is designed so as to be easily serviceable with a minimum of tools. For example, the side seal cartridges ( 18 ) and ( 20 ) may be installed and removed without tools by removing the retaining ring ( 9 ) and then extracting them from the fluid housing ( 11 ). Those cartridges ( 18 ) and ( 20 ) are easily disassembled and cleaned. Similarly, the fluid housing ( 11 ) may be removed from the handle/body ( 1 ) by unscrewing the lock ring ( 7 ) by hand.

First claim

The invention claimed is:

1. A spray gun for fast setting plural component materials, said spray gun comprising:
a gun body; an air cap; a retaining ring; a fluid housing removably attached to said gun body, said fluid housing having a threaded surface for threadedly receiving said retaining ring and generally opposed first and second radial ports in said threaded surface; and first and second seal cartridges retained in said ports by friction and said retaining ring.

2. The spray gun of claim 1 wherein said air valve engages said gun body with no more than three seals.

3. The spray gun of claim 1 wherein said air valve is connected to a muffler in said gun body.

4. The spray gun of claim 1 further comprising a fluid manifold removably fastened to said fluid housing, said fluid manifold being sealed thereto by an o-ring.

5. The spray gun of claim 1 further comprising a fluid manifold, said fluid manifold comprising a body and first and second fluid valves for connection to first and second components of a plural component material, each of said first and second valves comprising
a one piece stem having a head thereon to allow manipulation to open or closed positions; and
a seal for sealingly engaging said manifold body.

6. The spray gun of claim 1 further comprising:
a mix chamber located in said fluid housing;
a purge air passage located in said fluid housing;
a zerk fitting in said fluid housing and connected to said purge air passage for receiving protective material.

7. The spray gun for fast setting plural component
materials of claim 1 further comprising a fluid housing having a mix chamber located therein and said first and second seal cartridges sealing against said mix chamber, said cartridges and said mix chamber comprising sealing surfaces comprised of a hardened material.

8. The spray gun for fast setting plural component materials of claim 7 wherein said mix chamber is formed from a hardened material.

9. The spray gun for fast setting plural component materials of claim 8 wherein said hardened material is 440C stainless steel.

10. The spray gun for fast setting plural component materials of claim 1 further comprising a grease fitting in said fluid housing for injection of grease into said spray gun for storage.

11. A spray gun for fast setting plural component materials, said spray gun comprising:
a gun body; an air cap; a fluid housing attached to said gun housing and receiving said air cap and generally a mix chamber located in said fluid housing; a purge air passage located in said fluid housing; and a zerk fitting in said fluid housing and connected to said purge air passage for receiving protective material.

12. A spray gun for fast setting plural component materials, said spray gun comprising:
a gun body; an air cap; and a fluid housing attached to said gun body, said fluid housing comprising:
a mix chamber located in said fluid housing;
a purge air passage extending through said fluid housing from said gun body;
a fitting connected to said purge air passage for receiving protective material; and
first and second seal cartridges retained in said fluid housing;
wherein said fluid housing receives said air cap and wherein said first and second seal cartridges and said mix chamber comprise sealing surfaces comprised of a hardened material.

13. The spray gun for fast setting plural component materials of claim 31 wherein:
the fitting connected to said purge air passage for receiving protective material comprises a zerk fitting located in said fluid housing.

14. The spray gun for fast setting plural component materials of claim 31 further comprising:
a fastener for retaining said first and second seal cartridges in the fluid housing.

15. The spray gun for fast setting plural component materials of claim 34 wherein:
the fastener comprises a retaining ring.

16. The spray gun for fast setting plural component materials of claim 31 wherein the first and second seal cartridges each comprise:
a cartridge housing having one or more solvent resistant o-rings located on an outer surface; a seal having a cartridge seal surface and being located within the cartridge housing so that a spring biases the cartridge seal surface against the mix chamber; and a spring disposed between the cartridge housing and the seal.

17. A spray gun for fast setting plural component materials, said spray gun comprising:
a gun body; a piston located within the gun body configured to receive a connecting flange of a mix chamber and movable between a first position and a second position; an air cap; and a fluid housing attached to said gun body, said fluid housing comprising:
a mix chamber located in said fluid housing and connected to the piston by a connecting flange so that movement of the piston causes movement of the mix chamber;
a purge air passage extending through said fluid housing from said gun body; and
first and second seal cartridges retained in said fluid housing;
wherein said first and second seal cartridges and said mix chamber comprise sealing surfaces comprised of a hardened material.

18. The spray gun for fast setting plural component materials of claim 17 further comprising:
an air valve located within the gun body and connected to a trigger; and a trigger located outside the gun body and connected to the air valve; wherein depressing the trigger moves the air valve so that the piston moves from the first position to the second position causing material to be dispensed.

19. The spray gun for fast setting plural component materials of claim 18 further comprising:
a piston stop located between the piston and an end of the gun body for preventing movement of the piston; and a safety lock located outside the gun body and connected to the piston stop for engaging and disengaging the piston stop; wherein when the piston stop is engaged the piston stop prevents the piston from moving when the trigger is depressed.

20. The spray gun for fast setting plural component materials of claim 18 further comprising:
a muffler attached to the gun body for reducing noise.

21. The spray gun for fast setting plural component materials of claim 17 further comprising:
a fitting connected to said purge air passage for receiving protective material.

22. The spray gun for fast setting plural component materials of claim 21 wherein:
the fitting connected to said purge air passage comprises a zerk fitting.

23. The spray gun for fast setting plural component materials of claim 17 further comprising:
a fastener for retaining said first and second seal cartridges in the fluid housing.

24. The spray gun for fast setting plural component materials of claim 23 wherein:
the fastener comprises a retaining ring.

25. A spray gun for fast setting plural component materials, said spray gun comprising:
a gun body; an air cap; a fluid housing attached to said gun body, said fluid housing having:
generally opposed first and second radial ports; and
a mix chamber located therein and comprising an elongate body having first and second flattened sides comprising mix chamber seal surfaces; and
first and second seal cartridges retained in said first and second radial ports and sealing against the flattened sides of said mix chamber; wherein said first and second seal cartridges and said mix chamber seal surfaces are comprised of a hardened material.

Assignees

• Graco Minnesota Inc

Inventors

• Zittel Douglas P
• Sebion Michael J
• Anderson Richard D
• Linder Peter L
• Pellin Christopher J
• Weinberger Mark T
• Richter Mark C

Classifications

• B01F13/002

  Operations & Transport · mapped topic

• B05B7/1272

  actuated by gas involved in spraying, i.e. exiting the nozzle, e.g. as a spraying or jet shaping gas · CPC title

• B01F5/0256 Primary

  Operations & Transport · mapped topic

• B05B15/025

  Operations & Transport · mapped topic

• 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