Check valve actuator

Details Check valve actuator Check valve actuator

1986-05-23

1987-06-02

Michalsky, Gerald A.

Fluid handling

Line condition change responsive valves

Direct response valves

137522, 137523, 137527, 137553, 137559, 251 43, F16K 1518

Patent

active

046695001

ABSTRACT:
The invention disclosed herein relates to a check valve actuator for opening and closing a check valve, utilizing system pressure. The check valve actuator is comprised of a piston connected to a clapper assembly by a connecting rod. The piston is slideably received in a piston cylinder containing a control valve and a latching stem. A protective cage and a protective cover are mounted over the piston cylinder.

REFERENCES:
patent: 1059037 (1913-04-01), Collar
patent: 3106220 (1963-10-01), Hose
patent: 3177894 (1965-04-01), Camp
patent: 3789872 (1974-02-01), Elliott
patent: 3817278 (1974-06-01), Elliott
patent: 3942551 (1976-03-01), Schuller et al.
patent: 4188973 (1980-02-01), Weise et al.
patent: 4593719 (1986-06-01), Leonard

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