Wear ring for diaphragm and outer piston

Expansible chamber devices – Collapsible chamber wall portion – Wall portion formed of flexible material

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Details

92103R, 92100, F01B 1900

Patent

active

059964707

ABSTRACT:
A combination pump diaphragm and outer piston arrangement used in certain pump applications in which at least a portion of such diaphragm is in contact with an outer piston which would tend to abrade the diaphragm. The combination comprises a diaphragm member which includes a generally flat portion, a generally flexure annular portion and an enlarged bead like wear ring portion disposed intermediate such generally flat portion and such generally flexure annular portion. Such bead like wear ring portion has a first predetermined diameter and a predetermined configuration. The outer periphery of such diaphragm member is secured to a pump housing. An outer piston member is disposed for securing such diaphragm member to a piston rod of a pump. Such outer piston member includes a generally flat portion contacting such generally flat portion of such diaphragm member and an arcuate portion contacting such enlarged bead like wear ring portion. The outer piston member does not extend beyond the predetermined configuration of the enlarged bead like wear ring portion of such diaphragm member.

REFERENCES:
patent: 4887516 (1989-12-01), Scott et al.
patent: 5220863 (1993-06-01), Scott et al.
patent: 5291822 (1994-03-01), Alsobrooks et al.
patent: 5724881 (1998-03-01), Reynolds
patent: 5743169 (1998-04-01), Yamada

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