Improved battery-powered lawn cutting system
CA 2195995 C · Owner: Bruener, Patrick J. · Inventors: Fiorenza, John A. Ii; Pfaff, Joseph L.; Bruener, Patrick J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The improved battery-powered lawnmower includes a safety key (48) that is automatically removed when the removable battery (22) is removed while at the , same time blocking the battery recharger receptacle. The lawnmower also includes a control circuit that shuts off the lawnmower upon the occurrence of one or more of several predetermined conditions including low battery , voltage, the encountering of heavy grass for a period of 3 seconds or more and high motor current that may occur when the cutting blade is jammed. The cutting blade (264) is designed to move through any debris accumulated between the blade ends and the housing sidewall (284) without sacrificing the lift for needed …
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 March 2, 1995 and granted February 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 2, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 2017.
- 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.