Brakes – Internal-resistance motion retarder – Relative speed of thrust member or fluid flow
Patent
1987-01-23
1988-09-06
Kashnikow, Andres
Brakes
Internal-resistance motion retarder
Relative speed of thrust member or fluid flow
188312, 267134, 277177, 277205, F16F 949, F16F 500, F16J 908, F16K 4100
Patent
active
047686278
ABSTRACT:
A frictionless hydraulic damper including a cylinder having end walls mounting the opposite ends of a shaft in bushings with a clearance, bellows seals between each end wall and the portions of the shaft extending beyond each end wall, a piston head on the shaft within the cylinder, hydraulic fluid in the cylinder and in both bellows seals, an orifice construction located relative to the piston head for permitting flow of hydraulic fluid past the piston head to produce damping, and a conduit in the shaft for effecting communication between the two bellows. The damper as described above also functions as a snubber by including a valve construction which selectively closes the orifice construction. The damper as described above also includes structure which effectively closes off the clearances at the relevant bushings when the piston head travels above a predetermined velocity, to thereby prevent leakage past the bushings and thus enhance the snubbing action.
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Gastel Joseph P.
Kashnikow Andres
Oberleitner Robert J.
Tayco Developments, Inc.
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