Patent ID: 9022347
Filing Date: 2015-05-05
Classification: B29C,B29K,F16K,Y10T

Abstract:
1. A disc for use in a pneumatic valve, the disc comprising a body of flexible material and a stiffening insert of more rigid material, wherein the stiffening insert forms a closed loop structure that is at least partly covered by the flexible body, the flexible body comprising: a sealing region outside of the loop structure of the insert and an actuation region, comprising a central diaphragm region surrounded by an outer flexing region, inside the loop of the insert, wherein the flexible material is continuous and unperforated across the central diaphragm region, thereby rendering the diaphragm region suitable for forming a pneumatic seal; and the flexible material of the body is tensioned across the insert such that, when the disc is subject to equal pressure on both sides, the diaphragm and flexing regions are aligned substantially parallel to a plane containing the closed loop structure formed by the insert.