Springless seal for shock absorber

Details Springless seal for shock absorber Springless seal for shock absorber

1978-04-03

1980-01-29

Halvosa, George E. A.

Brakes

Internal-resistance motion retarder

Including seal or guide

92168, 188315, 277 3, 277 27, 277215, F16F 936

Patent

active

041857216

ABSTRACT:
This hydraulic shock absorber has a piston rod guide in the upper end of the pressure cylinder with a conical recess in which a toroidal piston rod seal of elastomer material is trapped under axial compression loads by a seal cover secured to the reservoir tube. The tapered wall of the recess acting on spaced and upwardly extending peripheral ribs of the seal causes the seal body to radially constrict inwardly so that inner annular sealing lips thereof sealingly engage the piston rod of the shock absorber. Oil pressure in pockets formed between the peripheral ribs also exerts a force to constrict the seal for improved sealing.

REFERENCES:
patent: 2848261 (1958-08-01), Schultze
patent: 3214182 (1965-10-01), Herbruggen
patent: 3528301 (1970-09-01), Wasmer
patent: 3621952 (1971-11-01), Long, Jr. et al.
patent: 3798744 (1974-03-01), Smith

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