Tractor-implement control system

Details Tractor-implement control system Tractor-implement control system

B - Operations, Transporting

60

K

138/72.1

B60K 25/00 (2006.01) B60D 1/16 (1980.01)

Patent

CA 1049892

TRACTOR-IMPLEMENT CONTROL SYSTEM 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 trac- tor 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 and it is provided with a spring return so that an operator on the tractor may, by successive pulls on a single control rope attached to the bell crank, progressively index the cam and hence selectively actuate either the first or second functional units on the ma- chine.

281109

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