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Expired Canadian patentCanada

Shock absorber with damping valve structure having wide range variable damping characteristics

CA 1325645 C · Owner: Atsugi Motor Parts Company, Limited · Inventors: Kanenari, Issei

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A variable damping characteristics shock absorber includes a piston provided with first and second disc valves. Within a piston an intermediate fluid chamber is defined between the first and second disc valves. The intermediate fluid chamber is selectively communicated with upper and lower fluid chambers defined in a shock absorber cylinder tube via by-pass path. A variable orifice formed by means of a rotary valve is provided in the by-pass path.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted December 28, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 28, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 1, 1989
GrantedDecember 28, 1993
Term endedDecember 28, 2010
Patent numberCA 1325645 C
Classification (IPC)F16F9/46 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedAug 1, 1989Patent grantedDec 28, 1993Term endedDec 28, 2010

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.