Tractor-implement control system
CA 1049892 A · Owner: Deere And Company · Inventors: Anstey, Henry D.
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 mobile agricultural machine pulled by a tractor has first and second hydraulically actuated functional units powered through a single pair of outlets of a hydraulic system on the tractor. A spool-type direction control valve mounted on the machine has its inlet side connected to the outlets of the tractor hydraulic system and outlets connected to the respective hydraulic actuators. The valve spool is selectively positioned by means of a cam to direct oil to actuate either the first or second functional units. The cam is rotated by a bell crank through a sprag clutch so that the cam is driven in one direction only. The throw of the bell crank is limited by a stop …
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 March 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 6, 1996.
- 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.