End of car cushioning unit
CA 1054096 A · Owner: Evans Products Company · Inventors: Maccurdy, William K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydraulic end of car cushioning device for use in railway freight cars. The device is intended for use between the coupler shank and car under-frame of a fixed sill type car and is designed so as to provide a long cushioning stroke under high impact loads. A load responsive check valve. is interposed in the metering system of the cushioning device for preventing changes in length of the unit under lower buff and draft forces as occur in train action. More specifically there is provided a cylinder with a piston received in the cylinder and the piston and cylinder defining a chamber adapted to receive fluid. The metering system includes a primary metering device in communication with 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
- Granted May 8, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 8, 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.