Patent ID: 8366416

Claim:
A pumping device, comprising: a housing having a front face that is at least partially formed by a block of material which extends partially inside the housing, said block consisting of: a single blind hole formed in a bottom surface of the block leading to a bore in the block, a first hole on a rear face of the block leading to an admission channel through which fluid is input to the bore and a second hole on a rear face of the block leading to an exhaust channel through which fluid is output from the bore, both said admission channel and said exhaust channel having an end that opens into the bore, and two through channels each leading between a front face and the rear face of the block, each of the two through channels comprising orifices located at the front face of the block, each of the orifices being fitted with a hydraulic hose connection configured to attach hydraulic hoses to the block, two solenoid valves fixed on the rear face of the block, a first one said solenoid valves being connected to the admission channel and to a first one of said two through channels for controlling fluid input into the bore and a second one of said solenoid valves being connected to the exhaust channel and to a second one of said two through channels for controlling fluid out from the bore, a plunger sliding leaktightly in a bearing fitted to the bore, said plunger defining, with said bore, a work chamber having a volume varying according to the axial position of the plunger, and a module for axially driving the plunger in the bore to vary the volume, the module being connected to the base of the plunger.