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Expired Canadian patentCanada

Sensor for braking systems

CA 1114858 A · Owner: Blomberg, Folke I. · Inventors: Blomberg, Folke I.

CIPO record

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

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Abstract From the Canadian patent

A sensor for responding to the rate of change of changing rotational speeds of a rotating vehicle wheel and including a flyweight coupleable for rotation in response to wheel rotation and selectively decoupleable in response to the exertion on the flyweight of a torque having a magnitude greater than a threshold magnitude due to a change in rotational speed of the wheel. In accordance with the present invention, a control device is operatively connected with the flyweight for exerting on the flyweight torques resisting decoupled rotation of the flyweight and is operable for changing the level of torque from a first level to a second level. Provision is made for signalling of any occurrence …

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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 22, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 22, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 30, 1978
GrantedDecember 22, 1981
Term endedDecember 22, 1998
Patent numberCA 1114858 A
Classification (IPC)B60T8/74 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedOct 30, 1978Patent grantedDec 22, 1981Term endedDec 22, 1998

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