Patent ID: 8297318

Claim:
A check valve comprising: a flexible membrane having a generally dome-shaped configuration, the flexible membrane including a center portion and an outer edge, the flexible membrane comprising: one or more flexible spokes at least partially disposed between the center portion of the flexible membrane and the outer edge of the flexible membrane; one or more collapsible zones at least partially disposed between the center portion of the flexible membrane and the outer edge of the flexible membrane; an elongated body with a length at least equal to a distance separating the outer edge and the center portion of the flexible membrane; and an opening extending through the center portion of the flexible membrane; a support member constructed from a generally rigid material, the support member including a center portion that is sized and configured to be connected to the center portion of the flexible membrane, the support member including an outer rim, the support member comprising: one or more spokes connecting the outer rim of the support member and the center portion of the support member; and an elongated body with a length at least equal to a distance separating the outer rim and the center portion of the support member; and an opening extending through the center portion of the support member, the opening in the center portion of the flexible membrane being at least partially aligned with the opening in the center portion of the support member to allow fluid to flow through the openings.