Tractor hitch control system

Motors: expansible chamber type – Working member position feedback to motive fluid control – Electrical input and feedback signal means

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Details

91459, 172 2, 318563, 318646, F15B 1316

Patent

active

048174998

ABSTRACT:
An electronic tractor hitch control system in which the position of an implement hitch relative to a tractor can be set using a main control operable by a tractor operator from his normal location on the tractor and can also be set using a secondary control located at a location remote from the normal operator's location, such as on the rear of the tractor fenders. The system is arranged so that any implement position signal set using the secondary control is opposed by a smaller hitch positioning signal generated within the system so that the speed of movement of the hitch in response to hitch positions set using the secondary control is moderated. The system also includes circuitry for detecting short circuits in parts of the system located in vulnerable locations.

REFERENCES:
patent: 3570243 (1971-03-01), Comer et al.
patent: 3821625 (1974-06-01), Scholl
patent: 4306314 (1981-12-01), Griffiths
patent: 4363068 (1982-12-01), Burns
patent: 4437295 (1984-03-01), Rock
patent: 4441136 (1984-04-01), Hampshire
patent: 4571500 (1986-02-01), Mucheyer
patent: 4585205 (1986-04-01), Coppola et al.
patent: 4658908 (1987-04-01), Hannukainen
"Dial and Switch Implement Hitch", Power Farming, 9/82.
"Le Relevage Electronique Sur Les Tracteurs", Motorisation et Technique Agricole, 5/86.

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