Combined normal and fine sowing wheel for sowing machines
CA 1289013 C · Owner: Steenken, Bernhard · Inventors: Steenken, Bernhard; Muller, Horst; Gattermann, Bernd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A combined sowing wheel for normal and fine seeds, both being mounted on a sowing machine. The sowing wheel for fine seeds is adapted to be secured to the sowing shaft by means of a non positive clamp-like connection. The sowing wheels are mounted side by side, as separate parts, of a common sowing shaft The sowing wheel for fine seeds is adapted to be connected to the sowing wheel for normal seeds by means of a coupling pin adapted to be locked with the aid, of a locking element, in at least two operating positions. The sowing wheels each comprises in addition to the central bore, a bore in which the coupling pin is disposed. In order to simplify substantially the locking elements and 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
- Granted September 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 17, 2008.
- 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.