Cushioning devices
CA 1189883 A · Owner: Oleo International Holdings Limited · Inventors: Carlton, Quintin H.; Bushnell, John J.; Stephens, Raymond B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1 -, "Cushioning Devices", ABSTRACT OF THE DISCLOSURE A lift buffer has a gas spring acting to provide the recoil force on the buffer plunger which slides within a ported tube. The gas spring chamber is within the buffer plunger. The gas spring rod is urged against the buffer base by the gas pressure and carries a disc at its lower end. A vent hole in the base vents from between the disc and the base to the annular low pressure liquid reservoir that surrounds the ported tube.
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 2, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 2002.
- 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.