Turf maintenance machine

Details Turf maintenance machine Turf maintenance machine

F - Mech Eng,Light,Heat,Weapons

15

B

138/77.1

F15B 1/02 (2006.01) A01D 34/24 (2006.01) A01D 75/30 (2006.01)

Patent

CA 1134718

ABSTRACT OF THE DISCLOSURE In turf maintenance machines, lifting and lowering of e.g. cutter units and partial counter- balancing of such units in their working positions may be provided by hydraulically actuated means comprising at least one selector valve, the or each valve having ports connected with at least one unit lifting ram, a pump, a reservoir and an accumulator; the valve is a four position spool valve which in the "lower" position thereof permits discharge of fluid from a ram to the reservoir thereby lowering an associated unit, whilst connecting the pump to charge the accumulator; when the unit reaches the ground the operator moves the valve to the counter- balance position, thereby counterbalancing the unit to the required extent by connecting the ram to the accumulator.

348664

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