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Foam dispensing gun

  • US 5,462,204 A
  • Filed: 03/29/1994
  • Issued: 10/31/1995
  • Est. Priority Date: 03/29/1994
  • Status: Expired due to Term
First Claim
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1. A foam dispensing gun, comprising:

  • a body having a pair of longitudinal passageways each including an inlet at one end adapted to be connected to a source of a pressurized fluid component, each passageway also including a conical valve seat at the other end of the passageway that opens to a nose at the end of the body;

    a nozzle connected to the body and surrounding the nose, the nozzle including an outlet and a mixing chamber disposed between the nose and the outlet;

    a valve member disposed in each passageway, each valve member having a forward needle portion with a conical outer surface that mates with the like surface of a respective valve seat and a rearward portion that seals off the respective passageway, each valve member also having an internal passage in fluid communication with the inlet of its respective passageway and terminating in a port short of the needle portion;

    a spring connected to urge each valve member to a closed position in which the needle portion seats against the respective valve seat; and

    a manually operable trigger to move the valve members to an open position against the urging of the springs.

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