Piston rod seal for adjustable pneumatic spring

Details Piston rod seal for adjustable pneumatic spring Piston rod seal for adjustable pneumatic spring

1976-03-22

1977-12-20

Marbert, James B.

Spring devices

Vehicle

Comprising compressible fluid

188269, F16F 500

Patent

active

RE0294977

ABSTRACT:
In a pneumatic spring of adjustable length, the piston rod is sealed to the cylinder by an annular sealing disc stressed in compression between the inner cylinder wall and a rigid, tubular projection on the radial end wall of the cylinder through which the piston rod extends outward of the cylinder cavity. The sealing disc is axially longer than the projection so that it extends inward of the cavity beyond the projection and carries an annular sealing lip engaging the piston rod only under the fluid pressure in the cylinder cavity, but practically fully relieved by the annular projection from the compressive stresses.

REFERENCES:
patent: 2771968 (1956-11-01), Mercier
patent: 2930608 (1960-03-01), Hogan et al.
patent: 3447645 (1969-06-01), Dorner et al.
patent: 3589701 (1971-06-01), Gee

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