Collector for trolley bus
CA 2126221 A1 · Owner: Sivers Research Ab · Inventors: Sivers, Carl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention describes a traffic system especially with vehicles driven by electricity as trolley busses but also and at the same time for instance trucks and private cars driven by electricity. The collector (4) is always perpendicular to the length of the vehicle (3) also when the collector is out from the sides. It is pressed in the direction towards the wire pair (1) just so much to keep the mean pressure of the wires on the contact shoes (22) about the same in both directions. This decreases or removes the risk for derailing. The driver can quickly and automatically without alighting return still derailed collectors. Should a vehicle stop with the collector on a spot icy or else …
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 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 2014.
- 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.