Patent ID: 10082138

Abstract:
A valve assembly for a diaphragm pump reduces leakage while providing good flow-through by including shaping of the seat and/or the valve that increases the elastic tension between the valve and seat in outer regions of the valve assembly, thereby providing a more optimal tension over the entire valve. In embodiments, outer regions of the seat are more steeply sloped upward than inner regions while the valve is substantially uniform in slope. In other embodiments, valve outer regions are less steeply sloped upward, or more steeply sloped downward, than its inner regions, and the seat is substantially uniform in slope. A vertical cross section of the seat and/or valve can include continuous curvature and/or discrete changes in linear slope. In some embodiments, two linear slopes are included in the vertical cross section of the seat or valve. The pump can be a multi-chamber pump.