F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
341/68, 74/97
F16H 48/30 (2006.01)
Patent
CA 1215559
DIFFERENTIAL LOCK CONTROL SYSTEM Abstract of the Disclosure A differential lock control system controls a hydraulically- operated differential lock via a solenoid valve. Energization of the solenoid valve is controlled by a circuit which includes a normally closed latching relay, a normally open relay and a pair of operator-controlled momentary contact switches. The control circuit further includes a pair of steering valve- operated switches coupled in parallel and to the normally closed relay. Each steering-operated switch is formed by a conductive plunger which is grounded by the steering valve housing whenever the steering valve spool is moved to the end of the valve bore to compress a resilient and electrically insulating O-ring interposed between the plunger and the valve spool.
454859
Anderson Lawrence V.
Newendorp Bruce C.
Sturtz Terry L.
Borden Ladner Gervais Llp
Deere & Company
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