Piston Pump having an Inlet Valve

Abstract

A piston pump includes a piston, a sealing element sealing the piston radially with respect to a cylinder, and an inlet valve arranged on the piston. The inlet valve includes a valve cage holding a closing member. The sealing element is integrally designed with the valve cage.

1 . A piston pump comprising:
 a piston;   a sealing element configured to seal the piston radially with respect to a cylinder; and   an inlet valve arranged on the piston, said inlet valve including a valve cage holding a closing member,   wherein the sealing element and the valve cage are one piece.   
     
     
         2 . The piston pump as claimed in  claim 1 , wherein the sealing element and the valve cage are produced from plastic. 
     
     
         3 . The piston pump as claimed in  claim 1 , wherein a spring support for a return spring supporting the piston relative to the cylinder is formed on the sealing element. 
     
     
         4 . The piston pump as claimed in  claim 3 , wherein:
 the sealing element includes a sealing lip resting against the cylinder, and   said sealing lip ends in an axially set-back manner relative to the spring support on the side facing away from the return spring.   
     
     
         5 . The piston pump as claimed in  claim 1 , wherein:
 the sealing element includes an axial groove, and   the axial groove is open towards the high-pressure area of the piston/cylinder arrangement.   
     
     
         6 . The piston pump as claimed in  claim 1 , wherein the sealing element is configured in a stepped manner on its side facing the piston. 
     
     
         7 . The piston pump as claimed in  claim 1 , wherein the sealing element surrounds the piston. 
     
     
         8 . The piston pump as claimed in  claim 1 , wherein the piston is designed in two parts with a first part turned towards a drive and a second part turned towards the sealing element. 
     
     
         9 . The piston pump as claimed in  claim 8 , wherein:
 the first part is a solid cylinder, and   the second part is a hollow cylinder.   
     
     
         10 . A vehicle brake system comprising:
 a piston pump including (i) a piston, (ii) a sealing element configured to seal the piston radially with respect to a cylinder, and (iii) an inlet valve arranged on the piston, said inlet valve including a valve cage holding a closing member,   wherein the sealing element and the valve cage are one piece.