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Expired Canadian patentCanada

Control system for the main hydraulic cylinder of metal sawing machine

CA 1066989 A · Owner: Dso "Zavodi Za Metallorejeshti Machini" · Inventors: Savov, Panayot P.

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 control system for the main hydraulic cylinder of a metal sawing machine, comprising a hydraulic pump with piston srping and load plunger, actuated by a cam wedged to the main, shaft of the machine and the piston chamber of the load plunger is connected through a suction valve to an oil reservoir and through a pressure valve - to the main hydraulic cylinders which, on its part, is connected through a pressure oil conduit to the chamber of a plunger , disposed in a panel on the outer surface, of which there is formed a pressure cylindrical channel which is, connected through a radial and a cylindrical hole to the plunger chamber, and the plunger is supported by a regulable srping the space …

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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 November 27, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 27, 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—
GrantedNovember 27, 1979
Term endedNovember 27, 1996
Patent numberCA 1066989 A
Classification (IPC)B23D49/04 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedNov 27, 1979Term endedNov 27, 1996

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