Lawn mower
CA 2072441 C · Owner: Thomas, W. Roger · Inventors: Carr, Vincent; Thomas, W. Roger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A braking system for a rotary mower comprises a brake element which is secured to an impeller and is urged by a spring into braking engagement with a fixed brake friction member. On start up of a motor of the mower rotation of, the impeller causes axial movement of the brake element against the spring out of braking engagement. Movement of the brake element may be assisted by mechanical means for, example a ball and ramp arrangement.
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
- Filed June 26, 1992 and granted August 26, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 26, 2014.
- 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.