Spring devices – Vehicle – Mechanical spring and nonresilient retarder
Reexamination Certificate
2008-03-11
2009-06-02
Schwartz, Christopher P (Department: 3657)
Spring devices
Vehicle
Mechanical spring and nonresilient retarder
C267S034000
Reexamination Certificate
active
07540480
ABSTRACT:
A shock absorber includes a cylinder tube connected to one portion of a shock absorbing body, a main piston rod extending from a piston with its extension end being connected to another portion of the shock absorbing body, a sub piston rod extending from the piston, an oil chamber pressurizing device arranged to pressurize a hydraulic oil, and damping force generators arranged to generate a damping force by allowing the hydraulic oil to flow between first and second oil chambers. A sealed space for containing an extension end of the sub piston rod is provided. Gas having a pressure larger than atmospheric pressure and smaller than a pressure applied on the hydraulic oil by the oil chamber pressurizing device is filled in the sealed space.
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Satou et al.: “Damper,” U.S. Appl. No. 12/091,958, filed Apr. 29, 2008.
Official communication issued in counterpart European Application No. 08004623.8, mailed on Jul. 10, 2008.
Sawai Seiji
Yamazaki Yutaka
Keating & Bennett LLP
Schwartz Christopher P
Yamaha Hatsudoki Kabushiki Kaisha
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