Discharge gate for railway hopper car
CA 1083887 A · Owner: Pullman Incorporated · Inventors: Schuller, James J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A discharge gate arrangement for railroad hopper cars having longitudinally extending discharge openings arranged in a horizontal plane beneath the hopper. Gate members arranged in pairs swing in opposite directions transversely of the car. Each gate member is pivotally hung and attached to an operating mechanism that includes a transversely extending shaft having two oppositely threaded portions. The operating mechanism includes split nuts located on the threaded shaft portions with attached links connected to the gate members in order that rotation of the shaft in one direction moves the split nuts in opposite directions and causes the cooperating gates to open and close simultaneously.
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 August 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 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.