Fluid handling – Convertible – Unit orientable in a single location between plural positions
Patent
1988-01-19
1989-05-09
Cohan, Alan
Fluid handling
Convertible
Unit orientable in a single location between plural positions
417417, 13754313, F04B 1704
Patent
active
048279684
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.
REFERENCES:
patent: 2767730 (1956-10-01), Laird
patent: 2833221 (1958-05-01), Dickey
patent: 3366067 (1968-01-01), Kocolowski
patent: 3400663 (1968-10-01), Wertheimer
patent: 4086518 (1978-04-01), Wilkinson
patent: 4101950 (1978-07-01), Hager
Cohan Alan
Facet Enterprises Inc.
VanOphem Remy J.
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