Fluid spring

Details Fluid spring Fluid spring

F - Mech Eng,Light,Heat,Weapons

16

F

267/68

F16F 9/02 (2006.01)

Patent

CA 1231988

ABSTRACT OF THE DISCLOSURE Fluid 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 fluid spring is sometimes selected such that the spring cannot fully overcome the gravitational forces acting onto the boot lid. In such cases the spring cannot fulfil the function of maintaining the boot lid in the upper terminal, ie. the fully opened position without additional provision. In order to enable the spring to maintain the boot lid in the upper terminal position, the spring is constructed such that in the outer terminal position of the piston rod with respect to the cylinder as increased resistance is expected by the 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.

468553

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