Oil balance system and method for compressors connected in series
CA 2583436 C · Owner: Northeast Bank · Inventors: Shaw, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compressor system includes a first compressor (10) which has a first low , side oil sump, in a first shell (12) and a second compressor (14) which has , a second low side oil sump in a second shell (16). The first and second compressors are connected in series. There is an oil transfer conduit (18) connected between the first low side sump of the first compressor (10) and the second low side sump of the second compressor (14). The system also includes a normally open check valve (20) in the oil transfer conduit. A method for effecting oil balance in a compressor system the method includes establishing , a first compressor in a first shell having a first low side oil sump and …
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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 September 27, 2005 and granted August 20, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 27, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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
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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.