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Expired Canadian patentCanada

Laminated bearings

CA 1108682 A · Owner: Wright (Barry) Corporation · Inventors: Peterson, Robert R.; Ventura, Daniel S.

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 bearing for carrying compressive radial loads comprising alternating bonded layers of a resilient material of a uniform modulus of elasticity and layers of a non-extensible material all, generally concentrically formed about a common center axis. The fatigue life of the bearing under torsional and compressive loads is enhanced by progressively decreasing both the length and thickness of each layer of resilient material with increasing radii, so that a substantially equal strain is carried across each layer of resilient material in response to each torsional load and the shape factor of each of the layers of resilient material remains substantially constant or increases with increasing …

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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 September 8, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 8, 1998.
  • 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 14, 1979
GrantedSeptember 8, 1981
Term endedSeptember 8, 1998
Patent numberCA 1108682 A
Classification (IPC)F16C33/04 +1 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedFeb 14, 1979Patent grantedSep 8, 1981Term endedSep 8, 1998

Sources & verification

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