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Expired Canadian patentCanada

Centrifugal fluid powder clutch

CA 1083506 A · Owner: Higgins, Peter B. · Inventors: Higgins, Peter B.

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

Abstract of the Disclosure A centrifugal clutch for mechanical transmission which includes a two-part casing and an internal rotor with a pseudofluid, material between the casing and rotor wherein a face of, the rotor opposite a face of the casing has a succession of grooves or waves which are substantially sinu-soidally shaped in a peripheral direction, and wherein each internal face of the casing has a succession of concave pockets which are sub-, stantially egg-shaped, as formed by an internal section of an egg-shell cut lengthwise through the egg with the wider end, of the egg cut off to a radius which will conform to the inside diameter of the casing, and with the narrower end of the …

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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 August 12, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 12, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 7, 1978
GrantedAugust 12, 1980
Term endedAugust 12, 1997
Patent numberCA 1083506 A
Classification (IPC)F16D37/00

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedFeb 7, 1978Patent grantedAug 12, 1980Term endedAug 12, 1997

Sources & verification

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