Hydraulic actuator cushioning device improvement

Details Hydraulic actuator cushioning device improvement Hydraulic actuator cushioning device improvement

1979-12-31

1981-10-06

Michalsky, Gerald A.

Expansible chamber devices

With cushioning means effective over a portion only of stroke

91452, 92143, F15B 1522

Patent

active

042928869

ABSTRACT:
A hydraulic cushioning device, hereinafter called cushion device, improvement in which a spring loaded piston, with an axial orifice, is slidably installed in the expansion chamber, and when return pressure from a hydraulic actuator, hereinafter called actuator is routed to the expansion chamber, by the cushion device, the piston, responding to this pressure moves slowly compressing a spring until it hits a stop at which time the remaining fluid from the actuator must pass through the cushion device restriction thus slowing the actuator rod speed and as the actuator bottoms the cushion device will cease routing actuator fluid under pressure to the expansion chamber and will open the expansion chamber to drain at which time the spring, in the expansion chamber, will force the piston toward the starting end of the expansion chamber, hastening the emptying thereof.

REFERENCES:
patent: 3023739 (1962-03-01), Dickson et al.
patent: 3043277 (1962-07-01), Carlson
patent: 3963045 (1976-06-01), Damitz

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