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Expired Canadian patentCanada

Fixed position, fixed frequency pendular type vibration absorber with frequency linearization

CA 1113515 A · Owner: United Technologies Corporation · Inventors: Mard, Kenneth C.

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 fixed frequency vibration absorber adapted to be fixedly mounted in a fixed vibration prone system. The vibration absorber is of the pendular-type with two dynamic masses suspended in pendular fashion from a base member, and with at least one coil spring acting upon the masses to establish and linearize the vibration absorber natural frequency. -1-

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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 1, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 1, 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.
FiledJuly 25, 1979
GrantedDecember 1, 1981
Term endedDecember 1, 1998
Patent numberCA 1113515 A
Classification (IPC)F16F7/00 +1 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedJuly 25, 1979Patent grantedDec 1, 1981Term endedDec 1, 1998

Sources & verification

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