Cutting head for cord type mower
CA 1289366 C · Owner: Takishita, Mitsukazu · Inventors: Hirose, Daijo; Takishita, Mitsukazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cutting head for a cord type mower which severs grass and weeds with cords unwound from a cord spool provided within a bowl-shaped rotary casing and radially projected from the rotary casing by rotating the rotary casing at a high rotating speed. A speed change control mechanism is provided within the rotary casing to control the rotating speed of the rotary casing variable according to the length of the projecting portions of the cords. When the cords wear and shorten the, moment of inertia of the cutting head decreases; consequently the rotating speed of the rotary casing increased and thereby the cords are fed out automatically by the increased centrifugal force acting on the cords, …
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 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 24, 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.