Gas spring

Details Gas spring Gas spring

1981-08-04

1984-02-28

Reger, Duane A.

Brakes

Internal-resistance motion retarder

Resistance alters relative to direction of thrust member

16 51, 18832215, F16F 919

Patent

active

044337590

ABSTRACT:
A gas spring for a hatch type door is disclosed, which comprises a cylinder, a piston received in the cylinder to divide the same into first and second chambers, a piston rod connected to the piston, a first device for providing a passage between the first and second chambers only when the piston moves in a direction to contract the second chamber, a second device for providing a passage between these chambers only when the piston rod is pushed against the piston by a force greater than a predetermined degree, and a third device for providing a passage between these chambers only when the piston is positioned within a predetermined area in the cylinder.

REFERENCES:
patent: 3882977 (1975-05-01), Watanabe
patent: 4106596 (1978-08-01), Hausmann
patent: 4185356 (1980-01-01), Kuivalainen et al.

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