Diaphragm plate group for diaphragm pumps

Abstract

A diaphragm plate group for activating a diaphragm pump, includes a pump chamber delimited by a circular membrane made of an elastomer material activated by a circular plate moved in alternating motion, the plate being slightly convex with a convexity thereof facing towards the membrane, and the plate exhibits, on a whole surface thereof facing towards the membrane and destined to come into contact there-with, a series of lowered parts.

1 . A diaphragm plate group for activating a diaphragm pump, comprising a pump chamber delimited by a circular membrane made of an elastomer material activated by a circular plate moved in alternating motion, characterised in that the plate is slightly convex with a convexity thereof facing towards the membrane, and the plate exhibits, on a whole surface thereof facing towards the membrane and destined to come into contact therewith, a series of lowered parts. 
     
     
         2 . The diaphragm plate group of  claim 1 , wherein the lowered parts are uniformly distributed on the surface of the plate. 
     
     
         3 . The diaphragm plate group of  claim 1 , wherein the lowered parts occupy overall a portion of the surface of the plate equal to at least thirty per cent. 
     
     
         4 . The diaphragm plate group of  claim 1 , wherein at least a radial portion of the plate is occupied by a sole lowered part. 
     
     
         5 . The diaphragm plate group of  claim 1 , wherein the plate exhibits a rounded peripheral edge in the axial section of the plate. 
     
     
         6 . The diaphragm plate group of  claim 1 , wherein the surface of the plate destined to come into contact with the membrane is clad with non-stick material. 
     
     
         7 . The diaphragm plate group of  claim 6 , wherein the non-stick material is polytetrafluoroethylene. 
     
     
         8 . The diaphragm plate group of  claim 1 , wherein in that the membrane, viewed in an axial section, exhibits a first central convexity facing towards the plate and a second convexity, concentric to the preceding convexity, facing in an opposite direction and terminating on the edge of the membrane. 
     
     
         9 . The diaphragm plate group of  claim 2 , wherein the surface of the plate destined to come into contact with the membrane is clad with non-stick material.