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Expired Canadian patentCanada

Mount for controlling or isolating vibration

CA 1287650 C · Owner: Hipsher, Gary L. · Inventors: Hipsher, Gary L.; Knurek, Thomas A.; Houston, Terry L.

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

Abstract of the Disclosure An isolating mount for connecting two parts or mechanisms includes a rigid bushing surrounded by a resilient block which includes cavities on opposite sides of said bushing located along a first plane parallel to the longitudinal axis of said bushing and a passage formed between the cavities. A quantity of liquid fills the cavities and passage, providing a liquid column of predetermined inertia in the passage between the cavities for controlling forces transmitted through the bushing to provide tuning of the damping characteristics of the mount to preselected frequencies of vibration. A rigid outer body surrounds and contacts the block and exerts compressive force …

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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 13, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 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.
FiledFebruary 11, 1987
GrantedAugust 13, 1991
Term endedAugust 13, 2008
Patent numberCA 1287650 C
Classification (IPC)F16F13/00 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedFeb 11, 1987Patent grantedAug 13, 1991Term endedAug 13, 2008

Sources & verification

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