Patent ID: 8104397
Filing Date: 2012-01-31
Classification: G01F

Abstract:
1. A diaphragm for use in a gas meter, comprising: a generally planar center section; a pair of diaphragm disks attached to the center section and positioned on opposite sides of the center section; an expansion section joined to the center section; and an attachment section joined to the expansion section, wherein the center section, the expansion section and the attachment section are integrally formed from a structural material, wherein the expansion section includes a plurality of convolutions formed in concentric rings, each of the convolutions including a plurality of curved peaks separated by a plurality of curved troughs wherein the plurality of curved peaks and the plurality of curved troughs are each joined by a connecting web, wherein the structural material is thicker in both the curved peaks and the curved troughs relative to the connecting web wherein the expansion section allows the center section to reciprocally move between an extended position and a retracted position relative to the attachment section.