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Expired Canadian patentCanada

Marine steering system torque-limiting device for preventing failure of rotatable flexible shaft used therein

CA 1103525 A · Owner: Pennwalt Corporation · Inventors: Kulischenko, Walter

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

i -, Abstract of the Disclosure, A torque-limiting device for preventing fracturing of a remotely controlled rotatable flexible shaft which rotates in response to rotation of a hand-operated steering wheel of a boat. The device employs a travelling nut which bears against appropriate stop members. The device is devoid of the usual keyways, springs, balls, gears and the like em-, polyed by typical limiting devices.

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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 23, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 23, 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.
FiledDecember 19, 1979
GrantedJune 23, 1981
Term endedJune 23, 1998
Patent numberCA 1103525 A
Classification (IPC)B63H25/08

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedDec 19, 1979Patent grantedJune 23, 1981Term endedJune 23, 1998

Sources & verification

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