Air bag and walking beam construction
CA 2041998 C · Owner: Raydan Manufacturing Inc. · Inventors: Kooistra, James T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A set of bag carrying saddles replace the leaf springs of conventional walking beam assemblies and operate in conjunction with a pair of linear stabilizing arms and shock absorbers thereby giving a traction distribution of approximately 25% per wheel. The use of walking beams in conjunction with shock absorbers gives a suspension system particularly suitable for extremely rough terrain because it operates on an approximate 2:1 ratio with the air bags. The saddles include vertical side plates having diagonal forwardly and upwardly extending front portions pivotally mounted to each chassis member of the vehicle and which are also pivotally connected to the walking beams intermediate the ends …
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
- Filed May 7, 1991 and granted April 19, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 7, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2013.
- 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.