Foam dispensing gun
First Claim
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.
2 Assignments
0 Petitions
Accused Products
Abstract
A foam dispensing gun has a body with a depending handle. The body has two passageways divided into forward and rearward portions by an intermediate chamber. A hose connector and duck-bill one-way valve are mounted in the rearward portion of each passageway, and a valve member extends through both the forward and rearward portions of each passageway. The valve member has a conical needle valve mating with a conical valve seat that opens directly to the nose of the body. A trigger lever is pivotally mounted in the chamber and engages the valve members to open and close the valves. A disposable nozzle with a mixing chamber and outlet is attached about the nose of the body by resilient arms engaging with ears extending from the body.
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Citations
26 Claims
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1. A foam dispensing gun, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A foam dispensing gun, comprising:
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a body with a depending handle, the body including a pair of parallel longitudinal passageways each having a forward portion and a rearward portion interrupted by a chamber that is open to the bottom of the body, the forward portion of each passageway terminating in a valve seat in a nose of the body, and the rearward portion defining an inlet for a fluid component; a removable nozzle connected to the body and surrounding the nose, the nozzle including a mixing chamber beyond the valve seats and an outlet; a pair of valve members disposed in the passageways and spanning the chamber, each valve member having a forward valve portion that is adapted to seat against a respective valve seat; front and rear seals sealing each valve member with both the forward and rearward portions, respectively, of its passageway; each valve member including a central passage in fluid communication with the inlet of its respective passageway and terminating in a port that is forward of the front seal; and a trigger lever mounted to the body in the chamber and engaging the valve members for movement of the valve members between open and closed positions with respect to the valve seats. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. In a foam dispensing gun having a body with a nose through which two fluid components can be ejected and a disposable nozzle attached to the body, the improvement wherein:
the body has a pair of ears extending from opposite sides and the nozzle is formed with a pair of resilient arms engageable with the ears when the nozzle is in place on the body but disengageable from the ears when the arms are squeezed toward the body. - View Dependent Claims (22)
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23. A foam dispensing gun, comprising:
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a body having a pair of spaced longitudinal passageways each including an inlet at one end adapted to be connected to a source of a pressurized fluid component, each passageway opening to a nose at the other end of the body; and a disposable nozzle connected to the body and having an open inlet chamber surrounding the nose, the nozzle including a wall portion dividing the inlet chamber and disposed between the openings to the longitudinal passageways, the nozzle further including an outlet and a mixing chamber disposed between the wall portion and the outlet, the wall portion extending longitudinally from the nose toward the mixing chamber. - View Dependent Claims (24)
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25. In a foam dispensing gun having a body with a nose having a pair of spaced openings through which two fluid components can be respectively ejected and a disposable nozzle attached to the body, the improvement wherein:
the nozzle has an inlet that fits around the nose and includes an open inlet chamber and a wall portion that divides the inlet chamber and extends transverse to the nose between the openings, the nozzle further includes an outlet and a mixing chamber between the wall portion and the outlet, and the wall portion extends longitudinally from the nose toward the mixing chamber.
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26. A removable nozzle for attachment to the nose of a foam dispensing gun through which two fluid components are ejected through a pair of spaced openings, the nozzle having:
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an outlet end; an inlet end adapted to fit to the nose of the gun and including an open inlet chamber a transverse wall portion that is adapted to be disposed against the nose and between the openings, the wall portion extending longitudinally toward the outlet end; and a mixing chamber between the wall portion and the outlet end.
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Specification