Dual acting implement leveling system with transport stabilization
CA 2281303 C · Owner: Bierl, James Franklin · Inventors: Bierl, James Franklin; Goins, Garrett Lee
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dual action leveling system for a disk or similar implement connected between the hitch and the lift wheel assembly includes a transport stop for providing a fixed hitch position for good transport leveling and stability. The system includes a fore-and-aft extending member with first and second coil springs and an adjustable spring abutment member threaded through one end of a rod for providing leveling for different ground conditions. Weight can be transferred to and from the front of the implement by simply turning a crank located at one end of the rod. For example weight can be transferred to the front of the implement to provide compensation for added weight of a rear mounted …
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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 August 31, 1999 and granted March 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 31, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 31, 2021.
- 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.