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Expired Canadian patentCanada

Motor speed control apparatus

CA 1205519 A · Owner: Caterpillar Industrial Inc. · Inventors: Melocik, Grant C.; Pickering, William

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

23-, Motor Speed Control Apparatus, Abstract of the Disclosure The invention pertains to apparatus for controlling increases in the speed of a motor including a transducer coupled to an accelerator pedal that generates digital numbers representing motor speed commands, a data processor for receiving the speed commands, generating motor speed limit signals in response to the digital numbers and delivering the limit signals to a controllable circuit for supplying power to the motor. The limit signals are delivered in response to time and the magnitude of the speed commands.

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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 3, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 3, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 19, 1983
GrantedJune 3, 1986
Term endedJune 3, 2003
Patent numberCA 1205519 A
Classification (IPC)H02P7/08 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedDec 19, 1983Patent grantedJune 3, 1986Term endedJune 3, 2003

Sources & verification

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