Pneumatic and hydraulic power control of drill

Details Pneumatic and hydraulic power control of drill Pneumatic and hydraulic power control of drill

F - Mech Eng,Light,Heat,Weapons

15

B

138/69

F15B 11/16 (2006.01) E21B 44/06 (2006.01)

Patent

CA 1136021

ABSTRACT An apparatus and method of controlling the input power to a drill feed or other hydraulic system in which the hydraulic power source is obtained from compresssed air supply. Wherein, the flow of air is varied in response to a hydraulic signal controlled by the load demand of the hydraulic system. Low and high mode controls are provided to operate hydraulically actuated mechanisms; and a hydraulic absorbing load is imposed to prevent stall or overspeed of the pump and motor during low load conditions.

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