Hitch control system

Details Hitch control system Hitch control system

1989-11-13

1990-11-13

Reese, Randolph A.

Earth working

Automatic power control

Draft responsive

172 2, 36442405, A01B 63112, A01B 63114

Patent

active

049695274

ABSTRACT:
A hitch control system includes various sensors, an operator command lever, a spring-centered three position raise/lower switch, a control unit which generates control signals as a function thereof and an actuator which moves the hitch in response to the control signals. The control system permits the operator to move the hitch to a working position via manipulation of the command and a single manipulation of the raise/lower switch. The control system ignores switch manipulation unless the manipulation persists for at least a certain time period, or if the switch is manipulated in a different manner within a certain time of the earlier manipulation. In a failure mode the control system permits the hitch to be moved to a working position via manipulation of the raise/lower switch when the command lever cannot be so used.

REFERENCES:
patent: 4132273 (1979-01-01), Mortonson et al.
patent: 4343365 (1982-08-01), Rajagopal et al.
patent: 4495577 (1985-01-01), Strunk et al.
patent: 4508176 (1985-04-01), Wiegardt et al.
patent: 4518044 (1985-05-01), Wiegardt et al.
patent: 4677542 (1987-06-01), Kasten
patent: 4817499 (1989-04-01), Bellanger et al.
patent: 4837691 (1989-06-01), Boe et al.
Deere & Company, "Rockshaft and Three Point Hitch-Operators Manual", OM-RW25630, pp. 50-1 to 50-14, 1989.
Massey-Ferguson, "Hydraulic Lift-MF3600 Massey Ferguson-Operator Instruction Book", pp. 40-43 and 48, 1987.

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