Air shutoff valve for a hopper gun

Details Air shutoff valve for a hopper gun Air shutoff valve for a hopper gun

1994-06-27

1995-02-28

Chambers, A. Michael

Valves and valve actuation

With correlated flow path

Pipe coupling or union

251231, 251357, F16K 3144

Patent

active

053930347

ABSTRACT:
Disclosed is a new air shutoff valve for a hopper gun for on/off control of inlet air synchronized to existing on/off control of texture coating mixture. The air shutoff valve comprises a tubular valve stem disposed within the air stem of the hopper gun. The valve stem has an air inlet port proximal a first end and an open second end. A valve control element controls airflow into the hopper gun by selectively obstructing the inlet aperture of the male quick disconnect air fitting. The valve control element comprises a resilient conical frustum-shaped plug disposed partially within the inlet end of the male fitting whereby pressurized air attempting to enter will seat the plug against the inlet aperture to stop airflow. The small end of the plug is fixedly connected to the first end of the valve stem. When the trigger is actuated the plug and first end of the valve stem enter the female quick disconnect air supply fitting mated to the male fitting and the air inlet port moves into the air stream allowing air to flow through the valve stem and air stem for propelling the mixture.

REFERENCES:
patent: 3137476 (1964-06-01), Rotheraine et al.
patent: 3970110 (1976-07-01), Schaedler et al.
patent: 4525910 (1985-07-01), Boehmer
patent: 4834294 (1989-05-01), Herzog
patent: 5060771 (1991-10-01), Robinson
patent: 5197711 (1993-03-01), Geiger et al.

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