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Expired Canadian patentCanada

Clutch with coolant flow control means

CA 1095844 A · Owner: Sundstrand Corporation · Inventors: Blackburn, Ronald B.; Grimm, Duane H.

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 clutch with coolant flow control means wherein the clutch structure includes an inner clutch drum and an outer clutch drum defining a clutch chamber therebetween with interfitting relatively movable clutch plates carried on both the drums. An actuator responsive to a control pressure of a predetermined value causes driving engagement of the clutch plates. A coolant flow path through the clutch structure includes a central hollow section of the inner clutch drum and at least one connecting passage from said central hollow section leading to the clutch chamber for delivering coolant flow to the clutch plates. A control valve within the central hollow section of the inner clutch drum is in …

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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 February 17, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 17, 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.
FiledJune 28, 1978
GrantedFebruary 17, 1981
Term endedFebruary 17, 1998
Patent numberCA 1095844 A
Classification (IPC)F16D13/72 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedJune 28, 1978Patent grantedFeb 17, 1981Term endedFeb 17, 1998

Sources & verification

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