Patent ID: 6089272
Filing Date: 2000-07-18
Classification: A61M,F16K,Y10T

Abstract:
A check valve comprising:a valve disk, wherein said valve disk is so arranged and configured as to be of a thickness sufficiently substantial to prevent said valve disk from exhibiting a significant amount of flexure even under high reverse pressure;an upper housing portion having an inlet aperture formed therein;a lower housing portion having an outlet portion formed therein, said upper housing portion being formed with a valve seat which protrudes towards the lower housing portion by a preselected distance, said inlet aperture extending through said valve seat, said valve seat being formed with a generally blunt face;a static seal ring for installation between said upper and lower housing portions in sealing fashion, said static seal ring being located circumferentially around and spaced away from said valve disk; anda support web extending between said static seal ring and said valve disk for supporting said valve disk from said static seal ring, said support web being flat when in an unbiased position, said support web being elastomeric and functioning to bias and maintain said valve disk against the blunt face of said valve seat of said upper housing portion around said inlet aperture in sealing fashion until and unless a predetermined forward pressure drop exists across said valve, said support web having disposed therein a plurality of apertures to allow the passage of a fluid therethrough.