Three-position selector valve

Details Three-position selector valve Three-position selector valve

2007-03-29

2010-10-26

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

With means to increase head and seat contact pressure

With positive reduction

C251S180000, C251S192000, C251S263000

Reexamination Certificate

active

07819383

ABSTRACT:
A selector valve (102) having at least first and second ports (108and110) is provided. The selector valve includes a closure element (120) selectively displaceable between a first position, wherein the closure element (120) sealingly engages the first port (108), and a second position, wherein the closure element (120) sealingly engages the second port (110). The selector valve (102) further includes a cam assembly that is configured to bias the closure element (120) into at least the first or second position in a manner such that the closure element (120) does not come into substantial contact with the first or second port (108or110) when being moved into the first or second position.

REFERENCES:
patent: 2534577 (1950-12-01), Courtot
patent: 3406943 (1968-10-01), Newell
patent: 3913618 (1975-10-01), Speedie
patent: 4287908 (1981-09-01), Storgard
patent: 4436116 (1984-03-01), Billeter
patent: 4502453 (1985-03-01), Kabasin et al.
patent: 4683864 (1987-08-01), Bucci
patent: 4934408 (1990-06-01), Christopherson
patent: 5188149 (1993-02-01), Williams
patent: 5379740 (1995-01-01), Moore et al.

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