Planetary gear transmission systems or components – Differential planetary gearing – Bevel gear differential
Patent
1993-11-30
1995-09-19
Wright, Dirk
Planetary gear transmission systems or components
Differential planetary gearing
Bevel gear differential
F16H 4822
Patent
active
054511887
ABSTRACT:
A driver-controlled differential lock control system allows vehicles with automatic, electronic and single range manual transmissions and air pressure actuated differential locking devices to have the vehicle differential thereof locked on only at low speeds. The control system includes a vehicle speed sensor, such as a speedometer transmitter, and a speed switch responsive to the vehicle speed sensor to selectively actuate a normally-closed air solenoid valve disposed in a vehicle air supply line upstream of a manually controlled air valve which supplies the differential lock actuator. The speed switch normally supplies power to the air solenoid valve until the speed of the vehicle exceeds a predefined limit whereat power is discontinued to the air solenoid valve causing disengagement of the differential lock.
REFERENCES:
patent: 4955853 (1990-09-01), Bausch
patent: 5366041 (1994-11-01), Shiraishi et al.
"Drive Instruction Kit #TP-8611 Driver Controlled Differential Lock" Rockwell International, Nov. 1991.
"Technical Service Aid--Installing and Operationg Axles Equipped with a Roofwell Driver Controlled Main Differential Lock".
Rockwell International Corp. #TSA-2-113, Jul., 1985.
Heign William R.
Kraft Anthony J.
Lehman Michael J.
Schaller David A.
Sims Charles D.
Navistar International Transportation Corp.
Sullivan Dennis K.
Wright Dirk
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