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Expired Canadian patentCanada

Vehicle wheel speed sensor

CA 1321490 C · Owner: Dana Corporation · Inventors: Chemelewski, Tad M.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An apparatus for sensing the angular velocity of a vehicle wheel includes a sleeve, a tone wheel attached to the wheel, and an electromagnetic sensor. The sleeve can be rotatably mounted on bushings inside a differential housing. The electromagnetic sensor extends through a wall of the housing into close proximity to a periphery of the tone wheel which has a plurality of generally radially extending evenly spaced teeth formed thereon. The tone wheel is positioned on the sleeve between a pair of retaining rings and is keyed for rotational movement with the sleeve. An inner end of the sleeve has means for coupling to the side gear of a differential carrier assembly. In one embodiment 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 24, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 24, 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.
FiledJuly 31, 1989
GrantedAugust 24, 1993
Term endedAugust 24, 2010
Patent numberCA 1321490 C
Classification (IPC)G01P3/48 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedJuly 31, 1989Patent grantedAug 24, 1993Term endedAug 24, 2010

Sources & verification

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