Patent ID: 6401749
Filing Date: 2002-06-11
Classification: F16K,Y10T

Abstract:
A check valve comprising:a valve housing formed from first and second housing components in telescoped engagement with one another and formed to define a valve chamber, an inlet to the valve chamber and an outlet from the valve chamber, the inlet and the outlet being substantially coaxially aligned, portions of said valve housing defining said valve chamber including generally planar valve seat concentrically surrounding said inlet and aligned substantially orthogonal to the coaxial aligned inlet and outlet; a valving element disposed in said valve chamber and movable from a first position where said valving element sealingly engages portions of said housing surrounding said inlet and a second position where said valving element permits flow from the inlet, through the valve chamber and to the outlet, the valving element having a substantially planar sealing face disposed for sealing engagement with said valve seat, and having an opposed spring engagement face; a disk spring having an annular outer support secured between said first and second housing components and having an inner support disposed adjacent the spring engagement face of the valving element, said disk spring being configured for urging said valving element into sealing engagement with portions of said valve housing surrounding said inlet, and being deflectable in response to pressure on said valving element for urging said valving element into an open condition, the disk spring being configured for generating a load on the valving element that is non-symmetrical with respect to the coaxially aligned inlet and outlet; and a backstop mounted over the inner support of the disk spring and secured to the spring engagement face of the valving element for securing the inner support of the disk spring to the valving element.