Hydraulic shock absorber

Details Hydraulic shock absorber Hydraulic shock absorber

2005-08-01

2008-10-28

Siconolfi, Robert A (Department: 3683)

Brakes

Internal-resistance motion retarder

Position of thrust member relative to chamber

C188S315000, C267S153000, C267S139000, C267S140000, C267S116000

Reexamination Certificate

active

07441637

ABSTRACT:
In a hydraulic shock absorber (1), a piston rod (5) protrudes from a cylinder (3) filled with hydraulic fluid. A rebound cushion (8) is fitted to an outer circumferential surface of the piston rod (5) in the cylinder (3). A stopper (6) fixed to the cylinder (3) contacts the rebound cushion (8) at an protrusion limiting position of the piston rod (5) to prevent further protrusion of the piston rod (5). An oil pool (8a, 9, 10, 15) formed in a sliding surface (8a, 14) of the rebound cushion (8) supplies oil to the sliding surface that slides on any of the inner circumferential surface of the cylinder (3) and the outer circumferential surface of the piston rod (5) to ensure smooth relative rotation of the piston rod (5) at the protrusion limiting position and the cylinder (3).

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