Check valve
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United States of America Patent
Stats
-
Nov 17, 1987
Grant Date -
N/A
app pub date -
Apr 1, 1986
filing date -
Apr 1, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A miniaturized check valve comprises a generally tubular body including a cylindrical base and a guide sleeve of reduced diameter which axially extends from the base. The body forms a an interior valve seat which surrounds an axially extending fluid passageway. The guide sleeve has a plurality of angularly spaced discharge openings and a pair of pilot orifices which are axially spaced from the valve seat. A valve ball is displaced from the valve seat to form a fluid flow path which extends generally axially through the valve seat and into the guide sleeve and thereafter generally radially through the orifices and openings for flow exteriorly of the guide sleeve. The ball is biased by a spring assembly which comprises a pair of axially aligned springs having a relatively low pre-load force and low spring rate.
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