Cable operated piston travel indicator
CA 2249808 C · Owner: Westinghouse Air Brake Company · Inventors: Hawryszkow, Michael G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cable operated piston travel indicator for readily viewing an amount of piston travel of a fluid actuated cylinder assembly positioned in a remote location is provided. The cable operated piston travel indicator of the invention is particularly applicable in the railway vehicle braking industry as an aid in performing pre-departure terminal tests of the air braking equipment of each car of the train. The cable operated piston travel indicator comprises an inner movable cable which is associated and movable with a piston. An outer shielding member encloses this inner movable cable and includes a clear cap with an indicating means thereon for viewing the movement of the inner cable member …
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, 1998 and granted January 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 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.