Low-wear shock absorber

Details Low-wear shock absorber Low-wear shock absorber

1978-12-26

1980-12-23

Butler, Douglas C.

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

188322, F16F 900

Patent

active

042405319

ABSTRACT:
A shock absorber comprising a cylinder which is divided into two chambers by a piston slidably mounted therein. A casing surrounds the cylinder and forms a reservoir therebetween. The reservoir is divided into two chambers by a ring-shaped seal having a restricted opening therein. A cap closes the upper ends of the cylinder and the casing and guides the piston rod through a piston rod packing therein. A pipe connects the lower portion of the cylinder to the restricted opening and includes a one-way valve therein. A ring-shaped chamber in the cap surrounds the piston rod adjacent to the piston rod packing and communicates with the upper reservoir chamber. This structure permits the damping fluid which leaks around the piston rod to drain into the upper reservoir; and upon the buildup of heat-related pressure at the piston rod packing, the one-way valve opens to relieve the pressure.

REFERENCES:
patent: 2036623 (1936-04-01), Focht
patent: 2138513 (1938-11-01), Rossman et al.
patent: 2240644 (1941-05-01), Focht

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