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Expired Canadian patentCanada

Torque converter clutch control for vehicles

CA 1077599 A · Owner: Ahlen, Karl Gustav · Inventors: Wahlsten, Gunnar; Ahlen, Karl Gustav

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

The present invention provides a control system for connecting and disconnecting the lock-up clutch in a hydrodynamic torque converter, comprising indicators for deriving signals representative of the input speed and torque setting of the prime mover, and means for comparing the signals and effectuating setting of the clutch in accordance with predetermined conditions.

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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 May 13, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 13, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedMay 13, 1980
Term endedMay 13, 1997
Patent numberCA 1077599 A
Classification (IPC)G05B11/26

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedMay 13, 1980Term endedMay 13, 1997

Sources & verification

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