Suspension system
CA 1195670 A · Owner: Orr, James D. · Inventors: Orr, James D.; Karapita, Alexander D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a counterbalancing apparatus which employs a piston-cylinder assembly wherein one end of the piston is under atmospheric pressure and the other end is under zero pressure so that the net force on the piston is always atmospheric pressure irrespective of the relative position of the piston and cylinder. This ensures a constant counterbalancing force for all positions of the object being counterbalanced.
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 October 22, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 22, 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.