Boom control valve
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United States of America Patent
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-
Nov 23, 1993
Issued Date -
N/A
app pub date -
Apr 20, 1993
filing date -
Sep 28, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control valve assembly designed to allow operation with minimum power requirements and a rapid response to a 'shut off' command. The assembly includes a pair of seal elements which operate in tandem. When the valve is open, fluid passes through a series of chambers and as the valve is closed, a substantial passageway allows fluid to bleed quickly to the outlet and reduce pressure to zero almost instantly, thus achieving almost instant shutoff. The dual seal arrangement is also designed so that internal fluid forces are nearly balanced so that minimal external power is required for proper operation.
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