Leveling rod assembly coupled between towed implement hitch and ground wheel axle
CA 2124498 C · Owner: Friesen, Henry · Inventors: Friesen, Henry; Friesen, Karl Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A towed rotary cutter has a main frame defined by the cutter housing supported at its rear by ground wheels that are coupled to the frame through means of a pivotably mounted axle. A hitch is pivotally mounted at the front end of the frame and carries a clevis assembly at the forward end thereof. A pair of parallel, transversely spaced leveling rods extend between the hitch and wheel axle with the rear ends of the rods being defined by eyes that are received on respective pins formed integrally with the opposite ends of a cylindrical equalizer bar that is pivotally mounted to the axle. These pins are radially spaced in opposite directions from the pivot axis of the equalizer bar. The …
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 27, 1994 and granted October 7, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2016.
- 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.