| abstract |
A dispensing gun for fluids such as urethane foam and the like is provided in which separate fluid components are individually led to the gun and are mixed within a replaceable mixing and dispensing nozzle member. After gun use, the used nozzle member can be removed for cleaning or replacement with a fresh nozzle, thereby obviating difficulties encountered in cleaning and purging the entire gun. Also disclosed are inexpensive and effective component fluid flow control valves, which are opened by a gun trigger. Each valve is positively closed into a fluidtight seal by pressure of the controlled fluid against a sealing resilient ball member, and is opened by the action of a plunger against the ball member. |