Agricultural implement for supporting ground working tools at variable heights relative to ground level
CA 1294168 C · Owner: Flexi-Coil Limited · Inventors: Friggstad, Terrance; Hundeby, David R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A height adjusting mechanism for a framework that supports a multiplicity of ground working tools of an agricultural implement operating at variable depths of ground penetration is disclosed. The variability is achieved by rotation of framework supporting rock shafts pivoting around pivot points on wheel supported wheel frames, which in turn support the rock shafts; rotation causes the lateral spacing of the wheels to vary also. Additionally flexibility of the framework optionally is provided by having certain fastenings and pivotal attachments between framework members in the form of resilient connections. The novel flexible framework is not critical to operation of the height adjusting …
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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
- Granted January 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 14, 2009.
- 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.