Valve actuators

Details Valve actuators Valve actuators

1976-03-17

1978-01-24

Schwadron, Martin P.

Valves and valve actuation

Fluid actuated or retarded

With mechanical movement between actuator and valve

74 56, 74110, 92130B, 251232, F16K 31122, F16K 3150

Patent

active

040700020

ABSTRACT:
An actuator for a valve in which valve opening and closing is effected via a rectilinearly movable member having, at one end, a driving device and, at its other end, a return-movement arrangement. To-and fro movement of the member under the control of the driving device and return-movement arrangement opens or closes the valve, or vice versa.
The return-movement arrangement includes a ramp connected to the member and a resilient energy storing cushion for acting oppositely to the driving device on the member with a bridging roller transmission rolling contacting the ramp so that, depending on direction of movement of the member, energy is either stored in or dissipated from the cushion.

REFERENCES:
patent: 2467020 (1949-04-01), Fischer
patent: 2766631 (1956-10-01), Van Sittert
patent: 3452961 (1969-07-01), Forsman
patent: 3463557 (1969-08-01), Alfieri
patent: 3535944 (1970-10-01), Newstead
patent: 3595136 (1971-07-01), Pitt
patent: 3663115 (1972-05-01), Vindez
patent: 3812766 (1974-05-01), Weiss
patent: 3889922 (1975-06-01), Peters

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