Angle cock with junction box
CA 2231075 C · Owner: Westinghouse Air Brake Company · Inventors: Engle, Thomas H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a railroad brake line shutoff valve assembly for connecting a car-mounted railway brake line to a brake line air hose which is for terminating in a brake line connector which is to be connected to another brake line connector on another vehicle. The shutoff valve assembly has a stationary valve portion and a moveable valve portion. The stationary valve portion has a first fluid line attachment site for the car mounted railway brake line and a second fluid line attachment site for the brake line air hose. Movement of the moveable valve portion to one position opens a flowpath through the valve between the first fluid line attachment site and the second fluid line …
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 March 4, 1998 and granted December 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 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.