Rebound cushion for hydraulic shock absorber

Details Rebound cushion for hydraulic shock absorber Rebound cushion for hydraulic shock absorber

2007-07-17

2007-07-17

Schwartz, Christopher P. (Department: 3683)

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

C267S220000

Reexamination Certificate

active

11329097

ABSTRACT:
A cylindrical rebound cushion (8) is fitted to an outer circumference of a piston rod (5) inserted in a cylinder (3) of a hydraulic shock absorber (1). An upper end surface (8a) of the rebound cushion (8) comes Into contact with a rod guide (6) fixed to the cylinder (3) when the piston rod (5) reaches a protruding limiting position. Recesses (9) are provided in the upper end surface (8a) of the rebound cushion (8) at regular angular intervals in order to provide working oil between the rod guide (6) and the upper end surface (8a), thereby ensuring smooth rotation of the rebound cushion (8) with respect to the rod guide (6) when the piston rod (5) at the protruding limiting position and the cylinder (3) relatively rotate.

REFERENCES:
patent: 5353689 (1994-10-01), Bolt et al.
patent: 5570763 (1996-11-01), Parejo
patent: 5667041 (1997-09-01), Jensen
patent: 2002/0053495 (2002-05-01), Kachi et al.
patent: 7802898 (1978-08-01), None
patent: 1624221 (2006-02-01), None
patent: 09-014328 (1997-01-01), None
patent: 2002-039252 (2002-02-01), None
patent: 2004-316726 (2004-11-01), None

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