Valves and valve actuation – With material guide or restrictor – Movable or resilient guide or restrictor
Patent
1991-02-12
1992-06-02
Rosenthal, Arnold
Valves and valve actuation
With material guide or restrictor
Movable or resilient guide or restrictor
251332, 251363, F16K 142
Patent
active
051180758
ABSTRACT:
A seal arrangement for a metering valve wherein a cylindrical member has a groove located on a face adjacent a seat which surrounds an opening connected to an inlet port. An elastomeric member has a base which is located in the groove with a projection that extends past the face on the cylindrical member. A ring is resiliently held against the elastomeric member by a sleeve to form a first static seal between the cylindrical member, retaining ring and sleeve. A piston located in the sleeve has a flange with first and second ribs thereon separated by a recess. An input member positions the piston such that the first rib engages the projection and compresses the elastomeric member before the second rib engages the seat to form a static seal between the piston and cylindrical member to assure that fluid flow between an inlet port and an exit port terminates when the piston is in a closure position. The recess on the piston provides a space for the elastomeric material to flow without damage to the projection when the first rib engages the ring and the second rib engages the seat.
REFERENCES:
patent: 2464400 (1949-03-01), Hooper
patent: 3051196 (1962-08-01), Miller
patent: 3549121 (1970-12-01), Mercier
Allied-Signal Inc.
McCormick Jr. Leo H.
Palguta Larry J.
Rosenthal Arnold
Walsh Robert A.
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