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Expired Canadian patentCanada

Suction sound damper

CA 1279579 C · Owner: Outzen, Svend E. · Inventors: Outzen, Svend E.

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 suction sound damper for a slide piston refrigerant compressor comprises a plastics housing (107). The latter consists of two interconnected shells (108, 109). The suction nipple (10) is of a material having a higher thermal resistance than the shell material and passes through the connecting gap of the shells and is clamped between them. The shells (108 109) are flat and are, interconnected substantially in the region of the largest crosssection of the housing. The connection of the shells takes place not only at the rim (45) but also at least at part of the intermediate walls (128, 138, 140, 55). The connection can be brought about by ultrasonic welding. Altogether one obtains an …

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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 January 29, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 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.
FiledJune 30, 1987
GrantedJanuary 29, 1991
Term endedJanuary 29, 2008
Patent numberCA 1279579 C
Classification (IPC)F04B39/00 +1 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedJune 30, 1987Patent grantedJan 29, 1991Term endedJan 29, 2008

Sources & verification

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