Hermetically sealed scroll type refrigerant compressor with a shaft seal mechanism
CA 2005379 A1 · Owner: Kikuchi, Kazuto · Inventors: Kikuchi, Kazuto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A shaft seal mechanism for a vertically installed hermetic type scroll compressor in which the interior of the housing is kept at discharge pressure is disclosed. The compressor in accordance with one embodiment of the present invention includes a drive shaft supported by a plain bearing in an inner block member. The drive shaft is operatively linked to an orbiting scroll which orbits within a stationary scroll. An isolated cavity is defined within the compressor housing by the stationary scroll and the inner block member. A spiral element of both the stationary and orbiting scrolls a driving mecha-, nism and a rotation preventing mechanism are disposed within the isolated cavity. The …
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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
- Filed December 13, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 13, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 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.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.