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Expired Canadian patentCanada

Hydraulic stabilizing system for vehicle suspension

CA 1237675 A · Owner: General Motors Corporation · Inventors: Johnson, Gregory J.; Eisenberg, Sidney W.

CIPO record

Overview

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

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Abstract From the Canadian patent

Abstract of the Disclosure:, A roll stabilizing system for vehicle wheel spring suspension includes piston and cylinder units mounted between the chassis and respective suspension control arms at opposite sides of the vehicle to counteract roll of the vehicle sprung mass during cornering maneuvers. A single ended piston rod in each cylinder unit defines pressure chambers of unequal cross-sectional area and adverse affects of such inequality on the suspension system are prevented by a force compensating hydraulic circuit including additional piston and cylinder combinations responsive to hydraulic pressures sustained in the suspension control arm hydraulic units.

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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 June 7, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 17, 1985
GrantedJune 7, 1988
Term endedJune 7, 2005
Patent numberCA 1237675 A
Classification (IPC)B60G9/00 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedSep 17, 1985Patent grantedJune 7, 1988Term endedJune 7, 2005

Sources & verification

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