Pump device for a container for liquid, pasty or foamable cleansing and skin care preparations

Abstract

The subject matter of the invention is a pump device for a container for liquid, pasty or foamable skin care preparations, e.g. for liquid soaps, disinfectants, skin protection pastes or creams, wherein the pump device comprises a conically tapering bellows, wherein the bellows exhibits several bellows elements each having a different diameter, wherein at least one smaller bellows element can be pushed into an adjacent larger bellows element.

1 . A pump device for a container for liquid, pasty or foamable skin care preparations, wherein the pump device comprises:
 a conically tapering bellows which comprises a plurality of bellows elements each bellows element having a different diameter, wherein at least one smaller bellows element is configured so as to be capable of being pushed into an adjacent, larger bellows element.   
     
     
         2 . The pump device according to  claim 1 , wherein at least one of said bellows elements is lockably engagable with another one of the bellows elements. 
     
     
         3 . The pump device according to  claim 1 , wherein the bellows elements exhibit a cascading course in section. 
     
     
         4 . The pump device according to  claim 1 , wherein each bellows element comprises an annular base element and an annular wall element connected thereto by an annular film hinge. 
     
     
         5 . The pump device according to  claim 4 , wherein the width of the annular base element is greater than the sum of the thickness of the annular base element and the annular wall element. 
     
     
         6 . The pump device according to  claim 4 , wherein the annular base element is at an angle of >90° but <180° to the annular wall element in the initial state of the bellows chamber. 
     
     
         7 . The pump device according to  claim 1 , further including an inlet and an outlet valve. 
     
     
         8 . The pump device according to  claim 7 , further including a valve cover on an inlet side of said pump, which is connected to the bellows, wherein the valve cover bears the inlet valve. 
     
     
         9 . The pump device according to  claim 8 , wherein the inlet valve comprises a valve disk which is pressed against a valve seat in the valve cover by a spring element. 
     
     
         10 . The pump device according to  claim 7 , wherein the outlet valve comprises a disk valve which is disposed in a liquid tight arrangement in an outlet connector of the bellows. 
     
     
         11 . The pump device according to  claim 11 , wherein the outlet valve includes a valve body, wherein the valve body receives a valve disk through a neck member disposed at a distance from the valve body said valve disk abutting on the outlet connector in radially moveable fashion. 
     
     
         12 . The pump device according to  claim 11 , wherein the valve disk includes a circumferential sealing lip which is arranged on the neck so as to run diagonally in the direction of the outlet connector. 
     
     
         13 . The pump device according to  claim 11 , wherein the valve body is configured so as to be clipped and received by the outlet connector. 
     
     
         14 . The pump device according to  claim 11 , wherein the neck includes a circumferential groove in the transition to the valve disk so as to facilitate the lateral folding of the sealing lip. 
     
     
         15 . The pump device according to  claim 4 , wherein the base element and/or the wall element are constructed so as to have a cross-section which is ring-shaped, diamond-shaped, square, or rectangular. 
     
     
         16 . The pump device according to  claim 4 , wherein the film hinge film hinge, when in an extended state, connects the wall and base element of the bellows chamber via the shortest distance. 
     
     
         17 . The pump device according to  claim 4 , wherein the radial distance of two adjacent wall elements corresponds generally to the cross-section of the annular base element. 
     
     
         18 . The pump device according to  claim 8 , wherein the valve cover includes an annular circumferential nose on its side facing the bellows. 
     
     
         19 . The pump device according to  claim 18 , wherein the nose defines a radial distance to the valve disk of the inlet valve. 
     
     
         20 . The pump device according  claim 8 , wherein the valve cover defines a valve ceiling which receives the inlet valve and which is discharged in cascading manner in the direction to the bellows so as to thereby minimize the dead space in the bellows chamber formed by the bellows.