Lawn mower knife assembly
CA 1232143 A · Owner: Stiga Ab · Inventors: Klasson, Jan; Engdahl, Lennart; Andersson, Roger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a lawn mower knife assembly including a rigid bar, plate or disc attached to a motor-driven generally vertical shaft and provided at a distance from the shaft attachment with at least, two attachment points for knife means and at least two, knife means, each including a blade section provided with a cutting edge and a shank section adapted for the fixation of the knife means to the bar plate or sheet. The new feature is that each of the attachment points comprises a flat surface section in which there is made a through-hole for a screw or the like and a recess arranged beyond the hole, and that the shank section of each knife means includes a flat surface section …
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 February 2, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 2, 2005.
- 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.