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Expired Canadian patentCanada

High speed, dual operated electromechanical actuator

CA 1231856 A · Owner: Plessey Incorporated · Inventors: Shube, Eugene E.

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

An electromechanical actuator is disclosed that is capable of high-speed and high force operation having a movable ram member that is biased toward executing a mechanical motion. A solenoid disengages a locking clutch that via one input to a differential transmission triggers a high power mechanical stored energy to cause the ram member to execute its motion. A d.c. motor is connected to the other input of the differential transmission and provides an alternate to release the locking clutch in the event of failure of the solenoid. Upon reversal of the polarity of the power supply to the motor, the ram member is reset.

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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 January 26, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 26, 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.
FiledMarch 13, 1985
GrantedJanuary 26, 1988
Term endedJanuary 26, 2005
Patent numberCA 1231856 A
Classification (IPC)G05G17/00 +1 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedMarch 13, 1985Patent grantedJan 26, 1988Term endedJan 26, 2005

Sources & verification

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