Damping force adjustable fluid pressure shock absorber

Details Damping force adjustable fluid pressure shock absorber Damping force adjustable fluid pressure shock absorber

2011-08-16

2011-08-16

Siconolfi, Robert (Department: 3657)

Brakes

Internal-resistance motion retarder

Resistance alters relative to direction of thrust member

C188S266200, C188S280000, C188S322150

Reexamination Certificate

active

07997394

ABSTRACT:
A piston coupled to a piston rod is fitted in a sealed cylinder in which oil is contained. During an extension stroke of the piston rod, a damping force is generated by an extension-side valve body, and at the same time, a valve-opening pressure of an extension-side main valve is adjusted by an inner pressure in an extension-side backpressure chamber. During a compression stroke of the piston rod, a damping force is generated by a compression-side valve body, and at the same time, a valve-opening pressure of a compression-side main valve is adjusted by an inner pressure in a compression-side backpressure chamber. A simple structure is realized by using a common guide bore for guiding the extension-side valve body and the compression-side valve body. Check valves are provided at both ends of the guide bore and communication passage are provided through the extension-side valve body and the compression-side valve body so that an amount of excess oil due to a movement of the extension-side valve body and the compression-side valve body can be expelled, thereby improving responsiveness of the shock absorber.

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patent: 2003-278819 (2003-10-01), None
patent: 2006-292092 (2006-10-01), None

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