Brakes – Internal-resistance motion retarder – Position of thrust member relative to chamber
Reexamination Certificate
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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Fukushima Masaru
Miwa Masahiro
Kayaba Industry Co. Ltd.
Rabin & Berdo PC
Rashid Mahbubur
Siconolfi Robert A
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