Valves and valve actuation – Mechanical movement actuator – Particularly packed or sealed
Patent
1992-06-12
1993-03-09
Rivell, John
Valves and valve actuation
Mechanical movement actuator
Particularly packed or sealed
277106, F16K 4102, B65D 5300
Patent
active
051920492
ABSTRACT:
A dual rated live loaded packing system for a valve stem includes at least one thrust load assembly extending between opposing facing elements on a valve body and a packing gland, respectively, for exerting a live load through a gland onto a packing ring contained in a packing chamber around the stem. The thrust load assembly includes an elongated tension member engaging a first one of the ears at one end and a second of the ears at an opposite end. An adjustable nut is threadedly engaged on the tension member having an end facing a surface on the second ear. A spring element is mounted on the tension member between the nut and the second ear for biasing the nut away from the second ear. A cylindrical spacer is mounted on the tension member enclosing the spring element for setting up a minimum value space between the nut and the second ear. A stop washer is mounted on the tension member between the end face of the nut and the ear and includes first and second opposite stop surfaces for selective engagement with a surface on the spacer to provide different thrust bias values between the ears depending on which of the first or second stop surface is aligned to face the second ear.
REFERENCES:
patent: 534575 (1895-02-01), Platts et al.
patent: 548089 (1895-10-01), Platts et al.
patent: 601614 (1898-03-01), Dudley
patent: 2441705 (1948-05-01), Jacobsen
patent: 3659862 (1972-05-01), Sebastian
patent: 3713660 (1973-01-01), Luthe
patent: 3787060 (1974-01-01), Astill et al.
patent: 3968970 (1976-07-01), Vogeli
patent: 4061157 (1977-12-01), Hanssen
patent: 4582329 (1986-04-01), Stalph
patent: 4722507 (1988-02-01), Lindackers et al.
patent: 4745944 (1988-05-01), Francart, Jr.
patent: 4773442 (1988-09-01), Lephilibert
patent: 5024453 (1991-06-01), Suggs
patent: 5056757 (1991-10-01), Wood
Cashco, Inc.
Rivell John
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