Current collector for transmitting energy between a contact wire and a motor coach
CA 2189409 C · Owner: Breitbach, Elmar · Inventors: Breitbach, Elmar; Buter, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A current collector (15) is provided for transmitting energy between a contact wire (2) and a motor coach. The current collector (15) comprises at least one collector shoe (1) and a support arm (11) for lifting the collector shoe (1) and for applying a contact force with which the collector shoe (1) lies from below against the contact wire (2) in transmitting energy. The support arm (11) is connected to the motor coach rotatably about a horizontal axis (17) and raisable about said axis (17) by a lifting device (3). The lifting device (3) is associated with a fast actuator (23) which is controlled by a control means (22) in dependence on the signal (20, 21) of at least one displacement …
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 1, 1996 and granted May 16, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 1, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 1, 2018.
- 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.