Gas spring for balancing the weight of the lid on the trunk of a

Details Gas spring for balancing the weight of the lid on the trunk of a Gas spring for balancing the weight of the lid on the trunk of a

1978-07-24

1980-12-23

Butler, Douglas C.

Spring devices

Vehicle

Comprising compressible fluid

267120, 267126, 267129, E05F 1502, F16F 902

Patent

active

042406196

ABSTRACT:
A gas spring includes a cylinder, filled with compressed gas, a piston rod movable axially inward and outward of the cylinder cavity, and a piston axially movable on the end of the piston rod in the cavity and resiliently biased into engagement with an abutment on the free end of the piston rod. One of two passages bounded by the piston and connecting the two compartments into which the cylinder cavity is divided by the piston is blocked when the piston engages the abutment and opened when the piston is moved away from the abutment against the resilient bias. The other passage is opened during outward movement of the piston rod from the cylinder cavity.

REFERENCES:
patent: 3938793 (1976-02-01), Kaptanis et al.
patent: 3963227 (1976-06-01), Molders
patent: 4045008 (1977-08-01), Bauer
patent: 4096928 (1978-06-01), Krafzig et al.
patent: 4113071 (1978-09-01), Muller et al.
patent: 4156523 (1979-05-01), Bauer

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