Patent ID: 9057366
Filing Date: 2015-06-16
Classification: F04B,F16J

Abstract:
1. A diaphragm pump ( 1 ) comprising a working or pump diaphragm ( 3 ) in at least one pump head ( 2 ), said working or pump diaphragm ( 3 ) is clamped by way of a clamping zone ( 4 ) which is arranged on an outer circumference thereof between two housing parts ( 5 , 6 ) of a pump housing and defines a working or delivery space ( 8 ) between itself and a pump head part ( 6 ), an annular zone of the working or pump diaphragm that is arranged adjacent to the clamping zone ( 4 ) is configured as a guide zone which is curved convexly in an unloaded state of the working or pump diaphragm and projects into the working or delivery space ( 8 ), and which encloses, in a central zone ( 10 ), a diaphragm armature ( 11 ), the diaphragm armature ( 11 ) being connected to a reciprocating drive ( 12 ) on a side thereof which faces away from the working or delivery space ( 8 ) of the at least one pump head ( 2 ), said reciprocating drive ( 12 ) is provided for oscillating reciprocating movement of the working or pump diaphragm ( 3 ), a compensation zone ( 16 ) of the working or pump diaphragm is provided between the guide zone ( 14 ) and the central zone ( 10 ), the compensation zone ( 16 ) is curved concavely in a direction of the reciprocating drive ( 12 ) in contrast in the unloaded state, and during the reciprocating movement, the working or pump diaphragm ( 3 ) rolls with the guide zone ( 14 ) on a complementarily formed edge or supporting zone ( 15 ) of the pump head ( 2 ), and the compensation zone ( 16 ) experiences stretching during an upward stroke, with a result that the compensation zone is tensioned taughtly at a top dead center position.