Quick vent valve for air brake line

Details Quick vent valve for air brake line Quick vent valve for air brake line

1988-09-28

1989-11-07

Nilson, Robert G.

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

303 69, B60T 1530

Patent

active

048785130

ABSTRACT:
A valve has a direct flow passage extending therethrough. A flexible diaphragm (170) is positioned between a main valve seat (156) and an exhaust seat (172). Flow of pressurized air into the valve (110) through the inlet port (142) deflects the diaphragm (170) away from the main seat (156) and seals it against the exhaust seat (172). Higher pressure at the delivery port (144) than the inlet port (142) move the diaphragm (170) away from the exhaust seat (172) and against the main seat (156). A shunt passageway communicates portions of the flow passage on opposite sides of the diaphragm (170) to prevent maintenance of residual positive pressure on the delivery side of the diaphragm (170). The shunt passageway includes a groove (161) along the frustoconical main seat (156) and peripheral cutouts (171) on the diaphragm (170). In one embodiment (210) of the valve, a push member (272,276) moves against the diaphragm (270) to help unseat it from the exhaust seat (272).

REFERENCES:
patent: 2716997 (1955-09-01), Crookston
patent: 3196890 (1965-07-01), Brandenberg
patent: 4461313 (1984-07-01), Beaumont
patent: 4596265 (1986-06-01), Goodell

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