Patent ID: 8291936
Filing Date: 2012-10-23
Classification: A61M,F16K,Y10T

Abstract:
1. A nonreturn valve, comprising: a first tube connection housing having an inlet channel, an inlet chamber connected to the inlet channel and an annular valve seat surrounding the inlet chamber; and a second tube connection housing coupled with the first tube connection housing, wherein said second tube connection housing includes a diaphragm disk between the two tube connection housings and made of flexible material, said diaphragm disk including a plurality of supporting walls spaced circumferentially about the outlet channel in the second tube connection housing for supporting the diaphragm disk and arranged opposite to the openings, respectively; a support directly connected with the supporting walls in the second tube connection housing and protruding toward the diaphragm disk; and ribs disposed on a surface of the support and extending beyond an outer periphery of the support, wherein the disk is adapted to be lifted from the annular valve seat toward the second tube connection housing upon an overpressure in the inlet channel, the disk is adapted to be pressed onto the valve seat upon an overpressure in the outlet channel, and the supporting walls and the grooves radially extend toward a center of the support.