Patent ID: 8820358

Claim:
A check valve, comprising: a cylindrical valve well having an internal wall and an internal floor which in combination defines a chamber; a circular valve disk; a pin, centrally disposed and connecting the valve well to the valve disk; the valve disk being axially symmetrically positioned with respect to the valve well; the valve disk forming a fluid seal with an annular rim of the valve well when a first pressure acting on the valve disk is greater than an opposing second pressure within the chamber; a plurality of vanes disposed within the chamber, each vane extending radially from the internal wall partially into and freely ending within the chamber towards a center of the chamber without contacting any portion of the check valve disposed within a center of the check valve, each vane extending upwards from the internal floor partially into the chamber, wherein the plurality of vanes is to prevent at least a portion of the valve disk from collapsing into the chamber due to an excessive first pressure on the valve disk.