Brake and clutch control
CA 2014528 C · Owner: Dobberpuhl, Dale Rudolph · Inventors: Dobberpuhl, Dale Rudolph; Hough, Barry Michael; Peterson, Rudolph Andrew Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A clutch and brake control circuit includes first and second relays connected to an interlock circuit and to the brake and clutch coils on a vehicle. The relays are interconnected with the coils so that the clutch coil cannot be energized unless the brake coil circuit is complete. Preferably the brake coil circuit includes a delay timer for assuring that the brake is energized for a preselected time period after the clutch coil is deenergized. The circuit is constructed such that if the clutch coil is reenergized during the time period, power to the brake coil is interrupted and the clutch coil turns on immediately without delay. Any time after the clutch coil is deenergized, a clutch …
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 April 12, 1990 and granted October 4, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2012.
- 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.