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Expired Canadian patentCanada

Linear motion ball bearing

CA 1285975 C · Owner: Tsubakimoto Precision Products Co. Ltd. · Inventors: Tonogai, Mitsuyasu

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 ball bearing assembly for guiding two machine parts in linear relative motion. Upper intermediate and, lower members are assembled to an inverted U-shaped bearing body which straddles the sides of a rail base. Grooves formed between the members and the bearing body provide circulation paths on either side of the rail base for ball bearings. All components are accommodated within the width of the bearing body.

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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 July 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 2008.
  • 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 29, 1988
GrantedJuly 9, 1991
Term endedJuly 9, 2008
Patent numberCA 1285975 C
Classification (IPC)F16C29/06

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedNov 29, 1988Patent grantedJuly 9, 1991Term endedJuly 9, 2008

Sources & verification

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