Annular bearing compartment
CA 2189743 C · Owner: Pratt & Whitney Canada Inc. · Inventors: Parkman, Kenneth D.; Matthews, Anthony J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a bearing compartment (24) for a turbo machine such as a gas turbine engine. The compartment includes a bearing compartment (24), to which is attached on its front and rear sides, covers (46 48) that allow for the passage of air, through the compartment as well as past the compartment. In particular the compartment includes a plurality of axially extending and circumferentially spaced apart sealed air cavities (118 120) surrounding an oil cavity (44) in the compartment; the bearing (26) which supports a shaft (10) extending through the engine is supported by the bearing (26). The compartment also includes a plurality of axially extending and …
Read the whole patent
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 May 4, 1995 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 4, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 2017.
- 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.