Hydraulic actuator

Details Hydraulic actuator Hydraulic actuator

1981-06-23

1982-11-23

Hershkovitz, Abraham

Expansible chamber devices

Rectilinearly moving working member and coaxial or parallel...

74 57, 74 89, F01B 300

Patent

active

043599320

ABSTRACT:
A spring cushioned static seal hydraulically operated actuator is disclosed which contains a hydraulically driven piston arranged to reciprocate in a chamber. A spring couples the piston to a rotatable shaft which limits the torque placed on the shaft by the piston in its drive stroke. A return spring functions to return the piston and drive spring to their initial positions upon release of the hydraulic drive applied to the piston. A static seal on the piston seals at the completion of the drive stroke of the piston. The actuator may be used to operate a subsea diverter to direct "pump down" or through flow line (TFL tools) through wye-branched flow passageways formed in a diverter body member located on a submerged well head.

REFERENCES:
patent: 3096966 (1963-07-01), McFarland, Jr.
patent: 3319925 (1967-05-01), Kojima et al.
patent: 3583245 (1971-06-01), Schaefer
patent: 3585669 (1971-06-01), Moret et al.
patent: 3602478 (1971-08-01), Cairns
patent: 3881516 (1975-05-01), Childers et al.
patent: 3989223 (1976-10-01), Burkhardt et al.
patent: 4196654 (1980-04-01), Stearns
patent: 4262693 (1981-04-01), Giebeler

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