E - Fixed Constructions – 01 – C
Patent
E - Fixed Constructions
01
C
94/51
E01C 23/09 (2006.01) E01C 23/08 (2006.01)
Patent
CA 1191044
ABSTRACT A power transmission method and apparatus for driving a road planar machine has the cutter unit in a positive mechanical drive with the drive shaft of a machine power unit through a hydraulically actuated clutch mech- anism. The wheel traction units for the machine are con- tinuously driven from the power unit by hydraulic motors operated by variable volume displacement pumps. A con- trol system for retaining the power unit at a set rota- tional speed required for a predetermined cutting or planing load is responsive to a drop in the set rotational speed, resulting from the cutting unit encountering an overload, to actuate the variable displacement pumps to decrease the forward speed of the machine without appre- ciably reducing the rotational inertia force of the cut- ting unit. If the cutting unit overload is of a short duration or momentary the set rotational speed of the power unit is resumed. If the overload, as observed by the machine operator after the occurrence of the drop in the set rotational speed of the power unit, appears to be severe or prolonged, the control system may be manually discontinued and the machine manually controlled until the cutting unit overload has been removed at which time the control system may again be placed into operation.
406787
Gomaco Inc.
Smart & Biggar
LandOfFree
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