Patent ID: 6158327
Filing Date: 2000-12-12
Classification: F04B,F05C,F16J

Abstract:
A diaphragm used in pump applications in which at least a predetermined portion of said diaphragm is in contact with an outer piston which would tend to abrade said diaphragm, said diaphragm formed from at least one layer of a preselected flexible material, said diaphragm comprising:(a) an outer bead like portion for securing said diaphragm to a pump housing, said outer bead like portion having a first predetermined configuration;(b) an annular flexure portion, said annular flexure portion including;(i) a first relatively short, flat-like portion having a first end formed contiguously with said outer bead like portion and extending around an inner periphery thereof,(ii) a first generally arcuately shaped portion having a first end formed contiguously with a second end of said first relatively short, flat-like portion and extending around an inner periphery thereof,(iii) a generally conical shaped middle portion having a first end formed contiguously with a second end of said first generally arcuately shared portion and extending around a periphery thereof,(iv) a second generally arcuately shaped portion having a first end formed contiguously with a second end of said generally conical shaped middle portion and extending around another periphery thereof, and(v) a second relatively short, flat-like portion having a first end formed contiguously with a second end of said second generally arcuately shaped portion and extending around a periphery thereof, said annular flexure portion having a substantially uniform first predetermined thickness;(c) an enlarged bulbous portion formed contiguously with a second end of said second relatively short, flat-like portion of said annular flexure portion and extending around an outer periphery thereof, said enlarged bulbous portion having a second predetermined configuration;(d) an enlarged section formed as a protrusion and extending outwardly from only an outer surface of said second relatively short, flat-like portion of said annular flexure portion, said enlarged section formed contiguously with said enlarged bulbous portion and extending around an outer periphery thereof, said enlarged section formed as said Protrusion on said second relatively short, flat-like portion of said annular flexure portion effecting said second relatively short, flat-like portion of said annular flexure portion to be thicker than said first predetermined thickness, said enlarged section formed as said protrusion on said second relatively short, flat-like portion of said flexure annular portion being less than one half a thickness of said first predetermined thickness, said enlarged section in contact with an end of such outer piston;(e) a generally flat center portion having a substantially uniform second predetermined thickness, said generally flat center portion formed contiguously with said enlarged bulbous portion and extending around an inner periphery thereof; and(f) an aperture, having a second predetermined diameter, formed through and substantially in a diametric center of said generally flat center portion for receiving a piston rod.