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Title:
SHOCK ABSORBER
Document Type and Number:
WIPO Patent Application WO/2014/148599
Kind Code:
A1
Abstract:
This shock absorber is equipped with an intake channel (3) for only allowing the flow from a reservoir (R) to a pressure-side chamber (R2), a rectifying channel (4) for only allowing the flow from the pressure-side chamber (R2) to an extension-side chamber (R1), and a variable valve (V) for only allowing the flow from the extension-side chamber (R1) to the reservoir (R). The interior of the shock absorber is provided with a large chamber (16) serving as a pressure-side pressure chamber for connecting to the pressure-side chamber (R2), and an outer-peripheral chamber (17) serving as an extension-side pressure chamber for connecting to the extension-side chamber (R1), which sandwich a free piston (5) for sliding in the interior of a bottom member (11) serving as a housing. The pressure-side pressure-receiving surface area (A1) of the free piston (5) is set so as to be larger than the extension-side pressure-receiving surface area (B1) thereof; hence, during a contraction operation in which a piston (2) moves downward, the damping force during a high-frequency input is reduced, because the free piston (5) moves downward even in a uniflow-type shock absorber in which the extension-side chamber (R1) and the pressure-side chamber (R2) are at identical pressures.

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Inventors:
TERAOKA TAKASHI (JP)
MASAMURA TATSUYA (JP)
Application Number:
PCT/JP2014/057711
Publication Date:
September 25, 2014
Filing Date:
March 20, 2014
Export Citation:
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Assignee:
KAYABA INDUSTRY CO LTD (JP)
International Classes:
F16F9/50; B60G17/08; F16F9/32
Foreign References:
JP2011247371A2011-12-08
JP2012197905A2012-10-18
JPH01238727A1989-09-22
JP2012137168A2012-07-19
US20120325604A12012-12-27
JP2009222136A2009-10-01
Other References:
See also references of EP 2977643A4
Attorney, Agent or Firm:
GOTO, Masaki et al. (JP)
Masaki Goto (JP)
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