Operating mechanism for box car sliding doors
CA 1072136 A · Owner: Pullman Incorporated · Inventors: Knippel, Willis H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
of the Invention, A cable drive mechanism for opening and closing a sliding box car door induces a high friction drive pulley carrying a cable which is anchored at opposite ends to the sides of the box car and a low friction guide pulley which is in aligning relation to the drive pulley. The drive pulley is manually rotated for sliding the box car door between open and closed positions.
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 February 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 1997.
- 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.