Patent ID: 6776079
Filing Date: 2004-08-17
Classification: F41F

Abstract:
An expandable elastomeric disk for retaining and discharging a fluid under pressure, said elastomeric disk comprising:first and second curvatures protruding opposite to each other from a central plane of said elastomeric disk wherein a surface of said first curvature is contactable to said fluid; and an annulet capable of attachment to a support structure for said elastomeric disk, said annulet including an interior circumference dovetailing to an exterior circumference with said interior circumference integrating to the surface of said first curvature at a first point and integrating to a surface of said second curvature at a second point; and wherein a distance of said first point from a central axis of said elastomeric disk is less than a distance of said second point from said central axis of said said elastomeric disk thereby providing a thickness combining said annulet and said first curvature in relation to said central plane greater than a thickness combining said annulet and said second curvature in relation to said central plane such that said thickness at said annulet and said first curvature reduces material strain at said thickness of said annulet and said first curvature during the expansion of said elastomeric disk with the effect of relocating the material strain to said central axis; wherein said central axis is perpendicular to said central plane.