Check valve for an electromagnetic fluid pump having a dual valve seat
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United States of America Patent
Stats
-
May 9, 1989
Grant Date -
N/A
app pub date -
Jan 19, 1988
filing date -
Jan 19, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A check valve having a dual valve seat, a valve member, a retainer, and a valve spring. The dual valve seat has a cylindrical body having an axial bore therethrough. A conical valve seat is provided at one end of the axial bore and a flat valve seat is provided at the other end of the axial bore. A recess is provided in the face of the cylindrical body at the end having the conical valve seat to form a first retainer seat and an annular recess is provided about the flat valve seat to form a second retainer seat by inverting the valve seat, the check valve may accept either a stem valve member having a conical sealing surface or a flat valve member having a flat sealing surface. The embodiment of this check valve in an electromagnetic fluid pump permits it to have different operating characteristics depending on which valve member is used.
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