Patent ID: 9657854
Date: 2017-05-23
CPC Classifications: F16K

Claim:
1. A device for controlling fluid flow, comprising: a valve body comprising an inlet, an outlet, and a sealing surface; a central shaft that is positioned within the valve body comprising an upper stop that is positioned below the inlet, a lower stop that is positioned below the upper stop, and a barrier interface that lies between the upper stop and the lower stop; a conical barrier, configured as the surface of a frustum of a cone and small base oriented towards the inlet and comprising an aperture positioned at the small base, wherein the central shaft passes through the aperture at the barrier interface, wherein the conical barrier is slidably engaged with the central shaft at the barrier interface and is configured to move between the lower stop and the upper stop, and a vent positioned at the barrier interface, wherein the vent is blocked in a backpressure state and exposed in a normal pressure state.