Pumping device

Abstract

A pumping device may include a drive device coupled to a feed element via a hydrostatic coupling. The hydrostatic coupling may be configured to control a torque transmission between the drive device and the feed element. The hydrostatic coupling may include a suction side connected to a pressure side via a coupling-fluid-carrying channel. A valve device may be arranged in the coupling-fluid-carrying channel.

1 . A pumping device, comprising:
 a drive device coupled to a feed element via a hydrostatic coupling the hydrostatic coupling configured to control a torque transmission between the drive device and the feed element,   the hydrostatic coupling including a suction side connected to a pressure side via a coupling-fluid-carrying channel, wherein a valve device is arranged in the coupling-fluid-carrying channel.   
     
     
         2 . The pumping device according to  claim 1 , wherein the pumping device is at least one of an oil pump, a vacuum pump, a water pump and a fuel pump. 
     
     
         3 . The pumping device according to  claim 1 , wherein the valve device has an adjustable piston, which is moveable between a closed position and an opened position to control a through-flow of a fluid through the valve device thereby controlling the torque transmission of the hydrostatic coupling. 
     
     
         4 . The pumping device according to  claim 3 , wherein the piston is prestressed via a spring into a position closing the valve device. 
     
     
         5 . The pumping device according to  claim 1 , wherein the valve device and the hydrostatic coupling are operable to communicate a through-flow of a fluid in a first fluid flow direction and a second fluid flow direction opposite the first fluid flow direction. 
     
     
         6 . The pumping device according to  claim 2 , wherein the coupling-fluid-carrying channel is integrated into a channel duct of the oil pump of an internal combustion engine. 
     
     
         7 . The pumping device according to  claim 1 , wherein the hydrostatic coupling operates according to at least one of a gerotor principle, an internal gear pump principle, an external gear pump principle, a pendulum slide cell pump principle and a vane-type pump principle. 
     
     
         8 . The pumping device according to  claim 3 , further comprising a setting device for adjusting the piston of the valve device, the setting device configured as at least one of a wax expansion element, a hydraulic setting device, a pneumatic setting device, an electrical setting device and a vacuum box. 
     
     
         9 . The pumping device according to  claim 1 , wherein the hydrostatic coupling is integrated into a housing of the pumping device. 
     
     
         10 . The pumping device according to  claim 1 , wherein the hydrostatic coupling includes at least one component mounted eccentrically thereon to enclose a displacement volume. 
     
     
         11 . The pumping device according to  claim 1 , wherein the torque transmission in the hydrostatic coupling occurs via at least one of mechanically and hydraulically thereby resulting in an increase in rotation speed of an output shaft connected to the feed element with respect to a drive shaft connected to the drive device. 
     
     
         12 . The pumping device according to  claim 1 , wherein the hydrostatic coupling includes an inner ring mounted eccentrically with an outer ring, the inner ring and the outer ring defining a displacement volume therebetween for receiving a fluid. 
     
     
         13 . The pumping device according to  claim 2 , wherein the valve device has an adjustable piston configured to transition between an opened position and a closed position to control a through-flow of a fluid through the valve device. 
     
     
         14 . The pumping device according to  claim 3 , further comprising a setting device for adjusting the piston of the valve device. 
     
     
         15 . The pumping device according to  claim 3 , wherein the valve device and the hydrostatic coupling are operable to communication a through-flow of a fluid in a first fluid flow direction and a second fluid flow direction opposite the first fluid flow direction. 
     
     
         16 . The pumping device according to  claim 15 , further comprising a setting device for adjusting the piston of the valve device, the setting device including at least one of a wax expansion element, a hydraulic setting device, a pneumatic setting device, an electrical setting device and a vacuum box. 
     
     
         17 . The pumping device according to  claim 5 , wherein the hydrostatic coupling is integrated into a housing of the pumping device. 
     
     
         18 . The pumping device according to  claim 17 , wherein the coupling-fluid-carrying channel is integrated into a channel duct of an oil pump. 
     
     
         19 . The pumping device according to  claim 6 , wherein the hydrostatic coupling is integrated into a housing of the pumping device. 
     
     
         20 . A pumping device, comprising:
 a drive device coupled to a feed element via a hydrostatic coupling, the hydrostatic coupling including a suction side connected to a pressure side via a channel configured to communication a coupling fluid, wherein the hydrostatic coupling is configured to control a torque transmission between the drive device and the feed element;   a valve device arranged in the channel for controlling a through-flow of the coupling fluid through the channel, the valve device including an adjustable piston configured to transition between a closed position blocking the through-flow and an opened position permitting the fluid flow, wherein the piston is prestressed into the closed position via a spring; and   wherein the valve device and the hydrostatic coupling are configured to communicate the through flow of the coupling fluid in a first direction and a second direction opposite the first direction.