Patent ID: 6824117
Filing Date: 2004-11-30
Classification: F16K,Y10T

Abstract:
A non-return valve comprising:a valve body including a fluid passageway which defines a fluid inlet and a fluid outlet, the fluid passageway being adapted to allow a flow of fluid from the inlet to the outlet; a valve diaphragm being connected across the fluid passage and including a collapsible aperture, said diaphragm being constructed of a resiliently flexible material and being configured wherein the diaphragm initiates closure of the collapsible aperture to prevent fluid flowing in a reverse direction toward the inlet; and a valve actuator connected to the diaphragm and being configured wherein axial movement of the actuator toward the fluid outlet deflects the diaphragm to expose the aperture and allow fluid to flow through the passageway from the inlet to the outlet only, the diaphragm being in the form of a generally conical-shaped diaphragm having the collapsible aperture located at or adjacent its apex which is orientated in a downstream flow direction.