Rotary mower cutting heads with flexible cutting blades
CA 1086965 A · Owner: Proulx, Raymond E. · Inventors: Proulx, Raymond E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cutting head for rotary mowers trimmers, and edgers for vege-, tation having a rotating body from which flexible flail-like filamentous cutting blades extend radially. The device contains improvements over the cutting head described in United States Patent 4,097,941 dated July 4th 1978. The flails are preferably of high-strength organic polymer such as nylon monofilament and exit from the rotating body through grommets. The improved grommets are molded from a bearing material of plastic filled with powdered dry lubricant and metal particles. The head has raised ramp portions alongside each grommet to protect the grommet. Sharp-edged radial ribs on the top of the rotating body operate to …
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 October 7, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 7, 1997.
- 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.