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Expired Canadian patentCanada

Mechanical seal with heat exchanger

CA 1319164 C · Owner: Nuraseal Co. Ltd. · Inventors: Drumm, Kevin R.

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 heat exchanger is provided for a seal assembly for altering the temperature of fluid sealed by the seal assembly. The heat exchanger includes a sealed annular chamber consisting of a pair of concentric sealed chambers of a recited construction and orientation, i.e. being separate and distinct from and non-, communicating with each other and which are adapted to be, mounted to the seal assembly in surrounding radially-spaced, relation to a pair of annular sealing members of the seal assembly to transmit heat energy toward or away from the seal assembly. The heat exchanger includes a median cylindrical wall formed of relatively high thermal conductivity metal. Inlet means are provided which …

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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 June 15, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 15, 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.
FiledDecember 12, 1986
GrantedJune 15, 1993
Term endedJune 15, 2010
Patent numberCA 1319164 C
Classification (IPC)F16J15/34 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedDec 12, 1986Patent grantedJune 15, 1993Term endedJune 15, 2010

Sources & verification

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