Pneumatic trailer system
CA 2309784 A1 · Owner: Kallstrom, Ervin C. · Inventors: Kallstrom, Ervin C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A trailer with a frame having a center load receiving channel for a motorcycle or for, a similiar load. A pair of oppositely extending wheel supporting axles are pivotally mounted, near the center channel. Bladder type air cylinder extend between the frame and axles near the outer end of, the axles. An air suspension system automatically controls the inflation of the air cylinder, during transit and allows the user to selectively deflate the air springs to lower the trailer to, a position close to the ground so a load such as a motorcycle can be rolled into the trailer. The user can then operate the system to inflate the air cylinder. Level control valves, maintain the air cylinders …
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 26, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 26, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 26, 2022.
- 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.