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Expired Canadian patentCanada

Energy conversion systems

CA 1056697 A · Owner: Lucas Industries Limited · Inventors: Sivill, Alistair D.

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

A system for converting wave energy from the sea into electrical energy, comprises a floatable assembly which in use, is moored at sea, and which is capable of internal movement in response to the action of waves. The assembly includes a hollow body mounted on a shaft and reciprocable angularly about the axis of the shaft in response to said internal movement. The body and the shaft define respective parts of a pump which also comprises a pair of spaced opposed annular cam, tracks extending around the axis of the shaft and rigidly connected to one of the pump parts defined by the body and the shaft and at least, one piston and cylinder arrangement disposed between the cam tracks and rigidly …

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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 19, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 19, 1996.
  • 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—
GrantedJune 19, 1979
Term endedJune 19, 1996
Patent numberCA 1056697 A
Classification (IPC)F03B13/12 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedJune 19, 1979Term endedJune 19, 1996

Sources & verification

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