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Expired Canadian patentCanada

Rotation variation testing machine

CA 1325118 C · Owner: Kawaguchi, Minori · Inventors: Ando, Masakatsu; Kawaguchi, Minori; Yamakawa, Susumu

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

ROTATION VARIATION TESTING MACHINE", Abstract of the Disclosure Apparatus for testing a power transmission drive intended for use with a reciprocating engine by use of an electric drive motor in lieu of the engine. The motor is provided in an adjustable input shaft driving unit which provides a variable speed drive of the power transmission drive corresponding to a variable speed drive effected by a reciprocating engine. In one form, the drive speed is varied by a controlled brake which, in the illustrated embodiment, is an eddy current brake. The brake may be utilized in conjunction with a variable speed input shaft driving unit for providing a second speed variation or may be used …

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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 December 14, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 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.
FiledNovember 29, 1988
GrantedDecember 14, 1993
Term endedDecember 14, 2010
Patent numberCA 1325118 C
Classification (IPC)G01M13/02 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedNov 29, 1988Patent grantedDec 14, 1993Term endedDec 14, 2010

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