Single-adjustment, dual-null pressure setting for an electrohydraulic valve pilot stage
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United States of America Patent
Stats
-
Oct 22, 2002
Grant Date -
Jun 6, 2002
app pub date -
May 21, 2001
filing date -
Dec 4, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrohydraulic valve pilot stage for controlling differential pressure is disclosed. The electrohydraulic valve pilot stage has a housing for protecting the valve; a first and second inlet capable of connection to fluid supplies; a first nozzle and a second nozzle fluidly connected to the inlets; a baseplate attached to the housing and the nozzles; a restraining member attached to the baseplate at a position between the first nozzle and the second nozzle; a pivot pin; a flapper restrained by the restraining member and having a first end and a second end, the flapper pivotably mounted on the pivot pin; and a null adjust pin mounted in a pivot pin contact capable position for adjusting the position of the ends of the flapper relative to the nozzles.
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