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Expired Canadian patentCanada

Flexible joints or bearings

CA 1231243 A · Owner: Btr Industries Limited · Inventors: Skipper, John 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

A flexible ball type joint or bearing is constructed by inserting into a generally tubular-shaped rigid outer housing an assembly of an inner rigid member having a curved surface of part-spherical or barrel shape a layer, of elastomeric material surrounding said curved surface and an annular member the inner surface of which is of a part-spherical or barrel shape to conform generally with said curved surface of the inner rigid member and said, annular member having an outer surface which conforms generally to the shape of the rigid outer housing. Subsequent to insertion of the assembly in the rigid outer housing, the rigid outer housing is adapted to possess a pair of end abutments between …

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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 January 12, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 12, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 29, 1985
GrantedJanuary 12, 1988
Term endedJanuary 12, 2005
Patent numberCA 1231243 A
Classification (IPC)F16C11/06

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedApril 29, 1985Patent grantedJan 12, 1988Term endedJan 12, 2005

Sources & verification

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