Gas turbine stationary blade double cross type seal device
CA 2251192 C · Owner: Hagi, Naoki · Inventors: Arase, Kenichi; Hagi, Naoki; Tomita, Yasuoki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Seal plates for gas turbine stationary blade inner shrouds are made in double cross type seal structure with view to enhance sealing ability. Seal plates 1 2 are mutually, lapped and disposed in turbine axial direction between inner shrouds 12 of stationary blades 11. End portion seal plate 5 is lapped on end portion of the seal plate 2 and end portion seal plate 6 is lapped under end portion of the seal plate 1. All these seal plates are fitted with their side end portions being inserted into groove 9a provided in the inner shrouds 12. Seal plates 3, 4 and seal plates 7 8 engaged, with the seal plates 3, 4 are also fitted between flange portions of the inner shrouds 12 with their side end …
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 October 20, 1998 and granted January 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 20, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 2020.
- 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.