Hopper door actuating mechanism
CA 1058448 A · Owner: Pullman Incorporated · Inventors: Adler, Franklin P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bottom dump hopper car having outwardly swinging clamshell doors includes a locking mechanism for maintaining a door in closed position by means of a stop and bracket arrangement. A vertically moveable arm is actuated to disengage the locking mechanism whereupon the door can swing outwardly as the arm swings in an outward path which is controlled by a ground rounded tripping mechanism.
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
- Granted July 17, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 17, 1996.
- 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.