Dispensing gun assembly for mixing and dispensing plural component foam

• US 20060208000A1
• Filed: 08/03/2005
• Published: 09/21/2006
• Est. Priority Date: 03/18/2005
• Status: Active Grant

• Current Assignee: ICP Adhesives & Sealants, Inc (ICP Group SA)
• Original Assignee: Polyfoam Products Incorporated (3M Company)
• Inventors: Huber, E. Richard, Murray, Pat L.
• Granted Patent: US 8,608,091 B2
• Time in Patent Office: Days
• US Class Current: 222/135
• CPC Class Codes: B29B 7/7404 Mixing devices specially adapted for foamable substances B29B7/76 takes precedence
• CPC Class Codes: B29B 7/7438 Mixing guns, i.e. hand-held mixing units having dispensing means B29B7/761, B29B7/7678 take precedence
• CPC Class Codes: B29K 2075/00 Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2105/04 cellular or porous

Abstract

A dispensing gun assembly including a gun body having a handle and a housing attached to the gun body. The housing includes first and second fluid passageways and first and second valve receiving bores. The fluid passageways are segregated from one another within the housing. First and second valves are received in the valve receiving bores. Each valve has open and closed positions and the valves move within the valve receiving bores when changing between the open and closed positions. A trigger member controllably contacts the valves and a nozzle assembly is connected to the housing.

Claims

1. A dispensing gun assembly comprising:

a gun body;

a housing attached to said gun body, said housing including first and second fluid passageways, said fluid passageways being segregated from one another within said housing, said segregated fluid passageways defined by an absence of a passageway within said housing between said first and second fluid passageways;

a first valve operably positioned in said first fluid passageway;

a second valve operably positioned in said second fluid passageway;

a trigger member controllably contacting said first and second valves; and

a nozzle assembly connected to said housing.

2. The assembly of claim 1, wherein each of said first and second valves include a cylindrical body having a port therethrough.

3. The assembly of claim 2, wherein each of said first and second valves has an open position and a closed position and said first and second valves partially rotate when changing between said open and closed positions.

4. The assembly of claim 2, wherein each of said first and second valves has an open position and a closed position and said first and second valves move substantially transverse to said first and second fluid passageways when changing between said open and closed positions.

5. The assembly of claim 1, wherein said housing includes a trigger receptacle positioned between said first and second fluid passageways, said trigger receptacle having a downwardly facing opening, and said trigger member controllably contacts said first and second valves within said trigger receptacle.

6. The assembly of claim 5, wherein said first valve is in a first valve receiving bore and said second valve is in a second valve receiving bore, said first valve receiving bore intersecting said first fluid passageway and said second valve receiving bore intersecting said second fluid passageway.

7. The assembly of claim 6, wherein said trigger receptacle is positioned between said first and second valve receiving bores.

8. The assembly of claim 1, wherein said nozzle assembly comprises a pair of inlet nipples, a premix portion a static mixer portion, an outlet portion, and a baffle, said baffle adapted to redirect flow of first and second fluid streams entering through said pair of inlet nipples so as to cause impingement of the fluid streams in said premix portion.

9. The assembly of claim 1, wherein each of said first and second valves has an open position and a closed position and said valves are spring-biased to said closed position.

10. The assembly of claim 9, wherein said first valve is in a first valve receiving bore and said second valve is in a second valve receiving bore, said first valve receiving bore intersecting said first fluid passageway and said second valve receiving bore intersecting said second fluid passageway.

11. The assembly of claim 10, further comprising:

a first return spring in said first valve receiving bore; and

a second return spring in said second valve receiving bore.

12. A dispensing gun assembly comprising:

a gun body having a handle;

a flow control valve housing connected to said gun body, said flow control valve housing including first and second fluid passageways, said first fluid passageway being segregated from said second fluid passageway within said flow control valve housing, said segregated passageways further defined by an absence of an enclosed flow path between said first and second fluid passageways within said flow control valve housing, said flow control valve housing having a trigger receptacle positioned between said first and second fluid passageways, said trigger receptacle having a downwardly facing opening;

a first valve operably positioned in said first fluid passageway;

a second valve operably positioned in said second fluid passageway;

a trigger member controllably connected to said first and second valves within said trigger receptacle; and

a nozzle assembly connected to said flow control valve housing.

13. The assembly of claim 12, wherein each of said first and second valves has an open position and a closed position and said first and second valves partially rotate when changing between said open and closed positions.

14. The assembly of claim 12, wherein said first valve is in a first valve receiving bore and said second valve is in a second valve receiving bore, said first valve receiving bore intersecting said first fluid passageway and said second valve receiving bore intersecting said second fluid passageway.

15. The assembly of claim 14, wherein said trigger receptacle is positioned between said first and second valve receiving bores.

16. A dispensing gun assembly comprising:

a gun body having a handle;

a housing attached to said gun body, said housing including first and second fluid passageways and first and second valve receiving bores said fluid passageways being segregated from one another within said housing, said segregated fluid passageways defined by an absence of a passageway within said housing between said first and second fluid passageways;

a first valve in said first valve receiving bore;

a second valve in said second valve receiving bore,

wherein each of said first and second valves has an open position and a closed position and said first and second valves move within said first and second valve receiving bores when changing between said open and closed positions;

a trigger member controllably contacting said first and second valves; and

a nozzle assembly connected to said housing.

17. The assembly of claim 16, wherein said first valve receiving bore intersects said first fluid passageway and said second valve receiving bore intersects said second fluid passageway and said first and second valves are operably positioned in said first and second fluid passageways, respectively.

18. The assembly of claim 17, further comprising:

a first return spring in said first valve receiving bore; and

a second return spring in said second valve receiving bore.

19. In a dispensing gun assembly including a housing having a first fluid passageway adapted for a first fluid stream and a second fluid passageway adapted for a second fluid stream and the first and second fluid passageways being segregated from one another within the housing, and a nozzle assembly releasably connected to the housing, the improvement comprising:

said nozzle assembly comprises;

a first inlet in fluid communication with the first fluid passageway and a second inlet in fluid communication with the second fluid passageway;

a premix portion in fluid communication with a static mixer portion which is in fluid communication with an outlet portion; and

a deflector in said premix portion, said deflector adapted to redirect flow of the first and second fluid streams entering through said pair of inlets so as to cause impingement of the fluid streams in said premix portion.

20. The dispensing gun assembly of claim 19, wherein said deflector is substantially transverse to the direction of the fluid streams as they exit said inlets.