Pump, In Particular Pneumatic Pump

Abstract

The invention relates to a pump comprising a housing ( 2 ), comprising at least one pump chamber ( 15 ), comprising in inlet valve ( 30 ) that has a valve element ( 30 a ) which controls an inlet opening ( 30 c ), comprising an outlet valve ( 33 ) that has a valve element ( 33 a ) which controls an outlet opening ( 33 c ), comprising a pressure relief valve ( 43 ) that has a valve element ( 43 a ) which controls a pressure relief opening ( 43 c ) and on which a spring element ( 48 ) acts in the closing direction ( 31 ), and comprising a spring chamber ( 49 ), that receives the spring element ( 48 ) end that faces away from the closing direction resting against the stop element.

1 . Pump with a housing ( 2 ), with at least one pump chamber ( 15 ), with an inlet valve ( 30 ) equipped with a valve element ( 30   a ) that controls an inlet opening ( 30   c ), with an outlet valve ( 33 ) equipped with a valve element ( 33   a ) that controls an outlet opening ( 33   c ), and with a pressure relief valve ( 43 ) equipped with a valve element ( 43   a ) impinged on a spring element ( 48 ) in closing direction ( 31 ) that controls a pressure relief opening ( 43   c ), and with a spring space ( 49 ) that contains the spring element, whereby a stop element ( 51 ) movable in closing direction ( 31 ) and accessible from the outer side of the housing is arranged, on which the spring element ( 48 ) supports itself with its end pointing against the closing direction, the inner wall ( 54 ) of the spring space ( 49 ) having an adjustment area ( 53 ) that extends along the closing direction ( 31 ) in which the excessively dimensioned stop element ( 51 ) with regard to the adjustment area ( 53 ) is held in place by clamping, in which case the spring space ( 49 ) has an assembly opening ( 150 ) through which the stop element is accessible for advancing towards closing direction, the stop element ( 51 ) being a sphere and that the inner wall ( 54 ) of the adjustment area ( 53 ) extends on a circular cylinder surface. 
     
     
         2 - 3 . (canceled) 
     
     
         4 . Pump according to  claim 1 , characterized in that the stop element ( 51 ) is made of a material that is harder than the material of a housing area that circumscribes the spring space ( 49 ). 
     
     
         5 . Pump according to  claim 4 , characterized in that the housing ( 2 ) of the pump is made of plastic. 
     
     
         6 . Pump according to  claim 4 , characterized in that the stop element ( 51 ) is made of metal. 
     
     
         7 . (canceled) 
     
     
         8 . Pump according to  claim 1 , characterized in that the lower-pressure side of the pressure relief valve ( 43 ) ends in the spring space ( 49 ). 
     
     
         9 . Pump according to  claim 8 , characterized in that the spring space ( 49 ) ends in the surroundings through a connection opening ( 59 ) in a wall circumscribing it. 
     
     
         10 . Pump according to  claim 8 , characterized in that the spring space ( 49 ) is connected to the inlet port ( 30 ). 
     
     
         11 . Pump according to  claim 10 , characterized in that the inlet port ( 30 ) ends in the spring space ( 49 ) through a connection opening ( 44 ) in the valve element ( 43   a ) of the pressure relief valve ( 43 ). 
     
     
         12 . Pump according to  claim 11 , characterized in that a border area circumscribing the connection opening ( 44 ) of the valve element ( 43   a ) is pressed by the spring element ( 48 ) against a ring-shaped seal seat ( 43   b ) that encompasses a pressure relief opening ( 43   c ). 
     
     
         13 . Pump according to  claim 8 , characterized in that the end of the inlet port ( 30 ) located upstream ends in a housing space ( 38 ) of the pump ( 1 ), in which a drive unit ( 39 ) that serves to drive the pump is arranged. 
     
     
         14 . Pump according to  claim 8 , characterized in that the valve elements ( 30   a,    33   a,    43   a ) are part of a one-piece valve membrane ( 13 ) clamped between an upper part of the housing ( 7 ) and a support ( 9 ) supporting them. 
     
     
         15 . Pump according to  claim 8 , characterized in that it has several pump chambers ( 15 ), in which case they are distributed around the centrally arranged pressure relief valve ( 43 ) when seen in top view in closing direction ( 31 ). 
     
     
         16 . Pump according to  claim 8 , characterized in that the at least one pump chamber ( 15 ) is made up of a flexible pump membrane ( 14 ).