Differential lock control system
CA 1215558 A · Owner: Deere & Company · Inventors: Kittle, Carl E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A differential lock control system includes an hydraulicallyoperated differential lock operated by a solenoid valve. Energization of the solenoid valve is controlled by a circuit which includes a normally open latching relay and seriesconnected switches which open and unlock the differential in response to sensed vehicle speed and brake application. The differential may be locked by closing a normally open momentary contact switch. A multiple relay circuit is coupled to the latching relay and is operable to automatically re-lock the differential when certain conditions relating to vehicle functions, such as steering pressure, wheel slip and draft force, are met.
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 December 23, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 23, 2003.
- 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.