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Expired Canadian patentCanada

Delivery pressure operated thrust control system for working contact surfaces in a scroll compressor

CA 1329183 C · Owner: Fujio, Katuharu · Inventors: Fujio, Katuharu

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

In a scroll compressor a thrust bearing is, movably held and urged to support thrust force of an orbiting scroll member against a fixed scroll member within a predetermined stroke in the axial direction of the scroll members, thereby to always allow desirable minute gap and also allow to back against urge to reduce abnormal pressure in a compression chamber.

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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 May 3, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 3, 2011.
  • 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 28, 1988
GrantedMay 3, 1994
Term endedMay 3, 2011
Patent numberCA 1329183 C
Classification (IPC)F04C18/04 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedDec 28, 1988Patent grantedMay 3, 1994Term endedMay 3, 2011

Sources & verification

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