Gas spring

Details Gas spring Gas spring

1984-11-15

1987-03-17

Kashnikow, Andres

Spring devices

Vehicle

Comprising compressible fluid

188300, 267120, 296 56, F16F 902, F16F 932, E05F 300, B62D 2500

Patent

active

046501657

ABSTRACT:
Gas springs are frequently used for assisting the movement of a movable construction unit, e.g. a boot lid with respect to a stationary construction unit, e.g. a motor car frame. In view of facilitating the closing operation of the boot lid, the pressure in the gas spring is sometimes selected such that the gas spring cannot fully overcome the gravitational forces acting onto the boot lid. In such cases the gas spring cannot fulfill the function of maintaining the boot lid in the upper terminal, i.e. the fully opened position without additional provision. In order to enable the gas spring to maintain the boot lid in the upper terminal position, the gas spring is constructed such that in the outer terminal position of the piston rod with respect to the cylinder an increased resistance is exerted by the gas spring against pushing the piston rod inwards of the cylinder. A simple and economic hydraulic circuit is proposed in view of achieving such increased resistance.

REFERENCES:
patent: 3938793 (1976-02-01), Kaptanis et al.
patent: 4166612 (1979-09-01), Freitag et al.
patent: 4221367 (1980-09-01), Smith
patent: 4230309 (1980-10-01), Schnitzius
patent: 4240619 (1980-12-01), Wirges et al.
patent: 4323224 (1982-04-01), Freitag

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