Pneumatic trimline control unit
CA 2203604 C · Owner: Wood, James A. · Inventors: Wood, James A.; Mazur, Richard J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pneumatic trainline control unit receives air from a first pneumatic trainline which it uses to charge and maintain pressure in a second pneumatic trainline. It also provides brake control pressure to a universal pneumatic brake unit on a rail vehicle upon receiving an emergency braking request from the second trainline. The pneumatic trainline control unit includes an air piloted transfer valve an air piloted, maintaining valve, a charging magnet valve an emergency release, magnet valve, a low pressure switch an air piloted vent valve, and a pipe network. The pipe network allows the first trainline to supply air to the transfer valve, the charging valve and the maintaining valve. The …
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 24, 1997 and granted December 12, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 2019.
- 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.