Linear motor supporting apparatus for vehicles
CA 2004194 C · Owner: Uozumi, Yukio · Inventors: Uozumi, Yukio; Kobayashi, Noboru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The linear motor supporting apparatuses are mounted to the front and rear portion of each bogie of a vehicle to maintain the small distance between an on-board coil and a ground stator, the on-board coil and the ground stator together constituting the linear-induction motor. The linear motor supporting apparatus incorporates a servo device which regulates the vertical position of the on-board coil according to the contour of the ground stator to keep the on-board-coil-to-ground-stator distance to a small predetermined value. The servo device consists of a valve body, a valve box and a servo, device body. The valve body is secured to a sensor member, which runs on and is kept in contact with …
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 November 29, 1989 and granted June 28, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 29, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 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.