Piston Pump With Improved Pressure Build-Up Dynamics

Abstract

A piston pump for delivering hydraulic fluid, having a piston that is able to move in a reciprocating fashion in order to build up pressure in a pressure chamber and having at least one valve equipped with a spring sealing element having a sealing region and a spring region in order to open and close an opening.

1 - 18 . (canceled)  
   
   
       19 . A piston pump for delivering hydraulic fluid, the pump comprising a cylinder, a piston that is able to move in a reciprocating fashion in the cylinder in order to build up pressure in a pressure chamber, and at least one valve equipped with a spring sealing element having a sealing region and a spring region in order to open and close an opening.  
   
   
       20 . The piston pump according to  claim 19 , wherein the spring sealing element is embodied in the form of a plate-shaped element compressing the sealing region, the spring region, and a retaining region.  
   
   
       21 . The piston pump according to  claim 19 , wherein the spring region of the spring sealing element includes at least one spring coil.  
   
   
       22 . The piston pump according to  claim 20 , wherein the retaining region of the spring sealing element is embodied in an annular form.  
   
   
       23 . The piston pump according to  claim 21 , wherein the retaining region of the spring sealing element is embodied in an annular form.  
   
   
       24 . The piston pump according to  claim 19 , wherein the spring sealing element produces a seal against a sealing seat of a valve plate.  
   
   
       25 . The piston pump according to  claim 19 , wherein the valve is situated in the cylinder of the piston pump.  
   
   
       26 . The piston pump according to  claim 19 , wherein the valve is embodied in the form of an inlet valve of the piston pump and adjoins a pressure chamber.  
   
   
       27 . The piston pump according to  claim 20 , wherein the valve is embodied in the form of an inlet valve of the piston pump and adjoins a pressure chamber.  
   
   
       28 . The piston pump according to  claim 27 , further comprising a return spring for the piston, the return spring being is contained in the pressure chamber and resting against the retaining region of the spring sealing element.  
   
   
       29 . The piston pump according to  claim 26 , further comprising an outlet valve, the inlet valve and the outlet valve of the piston pump each having a spring sealing element.  
   
   
       30 . The piston pump according to  claim 19 , wherein the valve is embodied in the form of an inlet valve of the piston pump and is situated in the cylinder element in such a way that an influx direction of hydraulic fluid through an inlet opening is the same as a movement direction of the piston during an intake phase of the piston pump.  
   
   
       31 . The piston pump according to  claim 20 , further comprising an outlet valve, the outlet valve having a valve-closure element and a spring element in order to open and close a through opening, the spring element being embodied in the form of a spring ring.  
   
   
       32 . The piston pump according to  claim 31 , wherein the spring ring has a slit.  
   
   
       33 . The piston pump according to  claim 31 , wherein the slit splits the spring ring in the width direction and is essentially Z-shaped.  
   
   
       34 . The piston pump according to  claim 31 , wherein the spring ring is accommodated in a groove in the cylinder element of the piston pump.  
   
   
       35 . The piston pump according to  claim 31 , wherein the inside of the spring ring is provided with a recess in order to at least partially accommodate the valve-closure element.  
   
   
       36 . The piston pump according to  claim 32 , wherein the inside of the spring ring is provided with a recess in order to at least partially accommodate the valve-closure element.  
   
   
       37 . The piston pump according to  claim 31 , further comprising a through opening which the outlet valve is able to open and close, the through opening being situated in the cylinder element of the piston pump in such a way that a movement direction of the piston is perpendicular to an outflow direction through the through opening.  
   
   
       38 . A brake system or stability system for a vehicle, including a piston pump according to  claim 19.