Valves and valve actuation – Mechanical movement actuator – Particularly packed or sealed
Patent
1998-03-16
1999-07-27
Walton, George L.
Valves and valve actuation
Mechanical movement actuator
Particularly packed or sealed
25131512, 25131513, 277522, 277526, 73 46, 137312, 137557, F16K 4106, F16J 1524
Patent
active
059276851
ABSTRACT:
A valve includes a column having an outer end portion defining a threaded bore, an outer mediate portion defining a first receiving recess communicating with the threaded bore, an inner mediate portion defining a passage communicating with the first receiving recess, and an inner end portion extending outwardly from a valve body and defining a second receiving recess communicating with the passage, and a valve stem having a first end portion formed with an outer thread, and a second end portion extending through the passage and formed with an annular flange received in the second receiving recess. A sealing device includes a primary set packing received in the first receiving recess, a secondary seal received in the second receiving recess and urged on the annular flange, a gland nut formed with an outer thread fixedly engaged in the threaded bore, a first biasing member mounted between the primary set packing and the gland nut, a lock nut fixedly mounted on the outer thread of the valve stem, and a second biasing member mounted between the gland nut and the lock nut.
REFERENCES:
patent: 3239191 (1966-03-01), Widera
patent: 3458172 (1969-07-01), Burrows
patent: 3954251 (1976-05-01), Callahan, Jr. et al.
patent: 4538790 (1985-09-01), Williams et al.
patent: 4558874 (1985-12-01), Williams et al.
patent: 4762301 (1988-08-01), Wozniak et al.
patent: 5064167 (1991-11-01), Dipalma
patent: 5263682 (1993-11-01), Covert et al.
patent: 5345812 (1994-09-01), Haboian
patent: 5460351 (1995-10-01), Holloway
JVP, Inc.
Walton George L.
LandOfFree
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