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Expired Canadian patentCanada

Variable stroke hydraulic cylinder control linkage

CA 1317530 C · Owner: Webster, Emmett G. · Inventors: Webster, Emmett G.; Cartee, Gilbert A.

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 control linkage for varying the length of stroke of a hydraulic cylinder is disclosed wherein a slide member is telescopically received within a bracket member one of these, members being connected to the extension end of the hydraulic cylinder while the other member is connected to the base end. A limiting mechanism in the form of a series of holes in one of the members alignable with a slotted opening in the other member and a fastener positionable within one of said holes and also through the slotted opening serves to limit the amount of telescopic movement of the slide member from the bracket member. As a result, the extension of the hydraulic cylinder can be selectively varied …

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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 May 11, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 11, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 20, 1987
GrantedMay 11, 1993
Term endedMay 11, 2010
Patent numberCA 1317530 C
Classification (IPC)F15B15/24 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedAug 20, 1987Patent grantedMay 11, 1993Term endedMay 11, 2010

Sources & verification

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