Long stroke, large bore, low friction hydraulic actuators

Details Long stroke, large bore, low friction hydraulic actuators Long stroke, large bore, low friction hydraulic actuators

1976-07-30

1979-02-20

Schwadron, Martin P.

Expansible chamber devices

With inspection window in expansible chamber wall portion

With lock

91402, 91408, 92 865, 92165R, 308 4R, F01B 3100

Patent

active

041400445

ABSTRACT:
A large bore, long stroke, low friction, hydraulic actuator having dual hydrostatic bearings permitting elastic deformation of the piston rod while inhibiting metal to metal contact between either the piston head or the deformed piston rod and the walls of the hydraulic cylinder. The actuator employs a safe and highly reliable metering orifice cushion decelerating means. Piston displacement is constantly monitored by a completely internal, magnetostrictive, sonic delay line displacement measuring means.

REFERENCES:
patent: 1548773 (1925-08-01), Ziebarth
patent: 3015315 (1962-01-01), Strimel
patent: 3138066 (1964-06-01), Walker
patent: 3153987 (1964-10-01), Thoma
patent: 3168013 (1965-02-01), Williamson
patent: 3311030 (1967-03-01), Halstead
patent: 3742822 (1973-07-01), Talbert
patent: 3776558 (1973-12-01), Maurer
patent: 3824904 (1974-07-01), Visser
patent: 3847404 (1974-11-01), Agostino, Jr.
patent: 3865015 (1975-02-01), Hakansson
patent: 3889934 (1975-06-01), Kamman
patent: 3898555 (1975-08-01), Tellerman
patent: 3940151 (1976-02-01), Phillips
patent: 3977308 (1976-08-01), Swander, Jr.

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