Gas spring with means for retaining piston adjacent one terminal

Details Gas spring with means for retaining piston adjacent one terminal Gas spring with means for retaining piston adjacent one terminal

1979-10-29

1981-12-29

Butler, Douglas C.

Spring devices

Vehicle

Comprising compressible fluid

188284, 188300, 267120, 267124, F16F 902, F16F 948

Patent

active

043078745

ABSTRACT:
In the illustrative embodiments described, the two compartments of the cylinder cavity of a gas spring of the piston-and-cylinder type, separated by a piston assembly, are connected by first and second passages extending across the piston. A valve arrangement on the piston assembly opens the second passage in response to movement of the piston assembly towards a terminal position in the cylinder and closes the second passage in response to movement of the piston assembly away from the terminal position. The first passage is open at all positions of the piston assembly remote from the terminal position. Releasable locking structure in the cylinder is operable to close the first passage as the piston assembly approaches the terminal position, thereby to hold the piston assembly in such terminal position until the locking force is manually overridden.

REFERENCES:
patent: 4045008 (1977-08-01), Bauer
patent: 4113071 (1978-09-01), Muller et al.
patent: 4156523 (1979-05-01), Bauer
patent: 4166612 (1979-09-01), Freitag et al.

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