Quick-release valve for a vehicle air release brake system
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United States of America Patent
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Jun 20, 1995
Grant Date -
N/A
app pub date -
Jun 15, 1993
filing date -
Jun 15, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A simplified and less-costly quick-release valve with controlled hysteresis for a vehicle spring-set air-release parking brake system lengthens the operating life of the valve, reduces energy consumption, extends compressor life and alleviates noise problems. The valve comprises a valve body and a plurality of internal passageways each of which is selectively connectable to at least another of the passageways. The selective connection is controlled by an integrally-formed flexural spring-brake-control release diaphragm within the valve body and disposed to either isolate or selectively connect the passageways depending on the relative pressure conditions within the passageways and respective areas of the diaphragm exposed to the pressures. The components are designed so that the normal variations or cycling of the supply or intake pressurized air does not cause cycling of the pressure in the spring-brake chambers.
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