Method of assembling wound rotor of vertical type adjustable speed hydroelectric rotating machine at its installation site
CA 1316675 C · Owner: Hitachi, Ltd. · Inventors: Yasaka, Yasuhiro; Akagawa, Hirotaka; Suzuki, Makoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of assembling a wound rotor of an electric rotating machine includes laying down a rotor body on its side in a pit in the power house of a hydroelectric plant such that its circumferential top surface protrudes from the pit to an extent that facilitates workers carrying out field coil assembling operations from the foundation of the power house. Also, any possibly necessary increase in height of the power house is limited to the sum of the axial length of the assembled wound rotor and the height of a crane lifting jig.
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
- Granted April 27, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 27, 2010.
- 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.