Variable displacement pump

Abstract

The invention relates to a variable displacement pump having two connections for supplying and withdrawing a volume flow guided by said variable displacement pump. The invention is characterized in that this variable displacement pump includes an additional connection for providing and additional volume flow.

1 . A variable displacement pump, comprising two connections for supplying and withdrawing a volume flow conveyed by the variable displacement pump, and an additional connection for providing an additional volume flow, forming a total of three connections. 
     
     
         2 . The variable displacement pump according to  claim 1 , wherein the variable displacement pump is adjustable by physical signals that are adjustable independent from each other such that the volume flows at two of the total of three connections are adjustable independent from each other. 
     
     
         3 . The variable displacement pump according to  claim 1 , wherein the variable displacement pump is adjustable by physical signals adjustable independent from each other such that the volume flows are inverted with regards to a direction of flow at two of the total of three connections. 
     
     
         4 . The variable displacement pump according to  claim 1 , wherein the variable displacement pump is a cell pump. 
     
     
         5 . The variable displacement pump according to  claim 1 , wherein the variable displacement pump is a radial piston pump. 
     
     
         6 . The variable displacement pump according to  claim 1 , wherein the variable displacement pump is an axial piston pump. 
     
     
         7 . The method for operating a variable displacement pump according to  claim 1 , wherein respective ones of the volume flows provided at respective ones of two of the connections. 
     
     
         8 . The method according to  claim 7 , wherein the volume flows provided at the two connections are adjustable independent from each other by independently adjustable physical signals. 
     
     
         9 . The method according to  claim 7 , wherein at least one of the volume flows provided at the two connections is inverted with regards to a direction of flow. 
     
     
         10 . The method according to  claim 7 , wherein the volume flows provided at the two connections are combined to form a third volume flow.