Damping force control type shock absorber

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8800729
APP PUB NO 20120247889A1
SERIAL NO

13423637

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Importance

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Abstract

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During either of the extension and compression strokes, hydraulic liquid flows from a cylinder upper chamber into a reservoir through an annular passage and a damping force control mechanism, and a damping force is generated by the damping force control mechanism. The check valve is provided with a sub-check valve in parallel thereto, which opens in a very low piston speed region to allow the hydraulic liquid to flow through an orifice passage. These check valves are opened successively as the piston speed increases, thereby generating a sufficiently small damping force in the very low piston speed region during the compression stroke of the piston rod, and obtaining a moderate damping force when the piston speed increases.

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Patent Owner(s)

Patent OwnerAddress
HITACHI AUTOMOTIVE SYSTEMS LTD2520 TAKABA HITACHINAKA-SHI IBARAKI 312-8503

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Katayama, Yohei Yokohama, JP 14 203
Nezu, Takashi Yokohama, JP 37 710
Yabe, Hiroyuki Tsukushino, JP 17 183

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