초록 ▼

Apparatus is provided for delivering a controllable, variable flow of pressurized fluid. Conduits define a circulating fluid flow system, the flow system passing through a transducer for transferring energy as a mechanical input or output to or from pressurized fluid circulating in the system. At le

Apparatus is provided for delivering a controllable, variable flow of pressurized fluid. Conduits define a circulating fluid flow system, the flow system passing through a transducer for transferring energy as a mechanical input or output to or from pressurized fluid circulating in the system. At least first and second volumetric pumps are connected to conduits of the flow system in parallel relation to each other and in flow communication with the transducer. An operating shaft, preferably a single shaft, engages the first and second pumps. Valves and piping are provided for selectively shunting and isolating the first and second pumps from the fluid flow system. Thus, energy applied to the fluid flow system through either the shaft or transducer may be applied to the other of the shaft or transducer with variable pressure and flow velocity in the flow system, depending on whether one or both of the pumps are in operating mode with the flow system.

대표청구항 ▼

Apparatus for delivering a controllable, variable flow of pressurized fluid, which comprises: conduits defining a circulating fluid flow system, said flow system passing through transducer means for transferring energy as a mechanical input or output to or from pressurized fluid circulating in said

Apparatus for delivering a controllable, variable flow of pressurized fluid, which comprises: conduits defining a circulating fluid flow system, said flow system passing through transducer means for transferring energy as a mechanical input or output to or from pressurized fluid circulating in said system; at least first and second nonadjustable, constant volumetric pump means operatively connected between high pressure and lower pressure fluid flow conduits of said flow system, said pump means being in parallel flow relation to each other and in operative flow communication with said transducer for transferring power through and out of said apparatus; operating shaft means engaging said first and second pump means, and means for selectively isolating fluid flow through said first and second pump means from said transducer, whereby energy applied to said fluid flow system through one of said shaft means or transducer may be applied to the other of said shaft means or transducer with variable pressure and fluid flow velocity in said flow system, depending on whether one or both pump means are in operating mode with the flow system.