Three port non-interflow poppet valve

Details Three port non-interflow poppet valve Three port non-interflow poppet valve

1975-03-14

1977-03-15

Cohan, Alan

Fluid handling

Systems

Multi-way valve unit

13762527, 13762564, 251 635, F15B 13043

Patent

active

040118924

ABSTRACT:
The valve element of this invention is generally cylindrical and has poppet valves at both ends for contact with seats at opposite ends of a chamber in which the valve element moves. Cylindrical side walls at each end of the chamber prevent interflow between ports during movement of the valve element from one end of its stroke to the other. For sub-sea use on offshore drilling well heads, a spring that moves the valve element in one direction is in a chamber sealed from an adjacent chamber to which the ambient sea water has access. Apparatus for pilot operation of the valve element has spaced, aligned bearing guides for guiding the valve element on opposite sides of an intervening chamber that holds the sea water.

REFERENCES:
patent: 1167027 (1916-01-01), Stephenson
patent: 2913005 (1959-11-01), Grant et al.
patent: 3379405 (1968-04-01), Natho
patent: 3460614 (1969-08-01), Burgess
patent: 3618690 (1971-11-01), Johnson
patent: 3771564 (1973-11-01), Bianchetta et al.

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