Brake pipe pneumatic valve
CA 2174826 C · Owner: Boget, Paul J. · Inventors: Boget, Paul J.; Li, Wei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A brake pipe pneumatic valve attachable to an end of a railway vehicle having a first flexible air hose for transmitting brake pipe pressure and the end-of-train device with a, second flexible air hose. The valve includes a housing having first second, and third, ports. The first port is releasably connectable to the first flexible air hose; the second port is releasably connectable with the second flexible air hose; and the third port is releasably matable with a coupling connected to a helper locomotive brake pipe. The valve includes a piston that divides the housing into first and second chambers. The first chamber communicates with the first and third ports; the second chamber …
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 April 23, 1996 and granted September 19, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 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.