Patent ID: 8496449
Filing Date: 2013-07-30
Classification: F04B

Abstract:
1. An air driven hydraulic pump, comprising: an air motor; an air inlet; an air valve between the air inlet and the air motor; a rotary drive shaft driven hydraulic pumping unit driven by the air motor; a reservoir in communication with the hydraulic pumping unit to supply hydraulic fluid to a compression chamber of the pumping unit; at least one port for connection to a hydraulic device to be powered by the hydraulic fluid from the hydraulic pump; and a hydraulic fluid return valve controlling the return of the hydraulic fluid from the hydraulic device to the hydraulic pump; a housing to which the air motor, the air valve, the hydraulic pumping unit, the reservoir and the return valve are secured, the housing forming an outer surface of the hydraulic pump; wherein the housing has a pressure actuator pedal forming part of the outer surface of the housing at a side edge of the housing depressible into the housing by a foot of an operator at the side edge of the housing for actuating the hydraulic pump to pump hydraulic fluid to a hydraulic device and the housing has a release actuator pedal forming part of the outer surface of the housing at the side edge of the housing depressible into the housing by the foot of the operator at the side edge of the housing for returning hydraulic fluid from the hydraulic device, the release actuator pedal being operable independently of the pressure actuator pedal.