Hydraulic shock absorber with a rod guide having an annular doub

Details Hydraulic shock absorber with a rod guide having an annular doub Hydraulic shock absorber with a rod guide having an annular doub

1990-09-21

1993-01-05

Oberleitner, Robert J.

Brakes

Internal-resistance motion retarder

Including seal or guide

188315, F16F 936

Patent

active

051762293

ABSTRACT:
A hydraulic shock absorber is provided which includes generally a cylinder assembly to define working and reservoir chambers therewithin, a piston rod, a rod guide member which guides bounding and rebounding strokes of the piston rod, and an oil seal contacting with the piston rod to seal an opening of the cylinder assembly. The rod guide member includes outer and inner supporting sections. The inner supporting section also includes outer and inner wall sections which are coaxially arranged with a preselected interval therebetween. The outer wall section is spaced from an inner wall of the cylinder assembly to provide flexibility to the rod guide in cooperation with the inner wall section. The shock absorber further includes a reinforcement partly inserted into the oil seal to provide flexural rigidity to the outer supporting section of the rod guide and a communication path defined by a chambered surface formed on a peripheral surface of the reinforcement and a recessed portion formed in an edge portion of the first supporting section to fluidly connect the working and reservoir chambers.

REFERENCES:
patent: 2040063 (1936-05-01), Padgett
patent: 3866946 (1975-02-01), Robison
patent: 4108287 (1978-08-01), Kato
patent: 4274517 (1981-06-01), Kato et al.
patent: 4438834 (1984-03-01), Handke et al.
patent: 4445598 (1984-05-01), Brambilla
patent: 4881750 (1989-11-01), Hartmann
patent: 4989701 (1991-02-01), Yamaoka et al.

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