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Expired Canadian patentCanada

Saw blade tensioning arrangement

CA 1308336 C · Owner: Ab A.K. Eriksson · Inventors: Janson, Kurt

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

A saw blade tensioning arrangement for band saws and like machines which includes a hydraulic cylinder having arranged for movement therein a piston which is intended to activate saw blade tension control means. The blade tension is in, this way, dependent on the hydraulic pressure in the cylinder. The arrangement includes means for pneumatically regulating the hydraulic pressure, these means including a pneumatically operated pressure booster and means for activating the pressure booster at the end of a working stroke of the hydraulic piston, therewith to tension the saw blade to the desired working tension, this working tension being determined, inter alia, by the blade width.

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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 October 6, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 24, 1987
GrantedOctober 6, 1992
Term endedOctober 6, 2009
Patent numberCA 1308336 C
Classification (IPC)B23D55/10 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedNov 24, 1987Patent grantedOct 6, 1992Term endedOct 6, 2009

Sources & verification

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