Patent ID: 7913714

Claim:
A liquid check valve comprising: a valve body defining a liquid flow path through a central open chamber having a first end and a second end; the valve body including a seal within the central chamber between the first end and the second end, and a rotating stem extending into the central chamber through at least one side of the valve body, the rotating stem extending outside the valve body, the stem positioned toward the second end with respect to the seal; a sealing member positioned within the valve body between the first end and the seal, the sealing member sized to cooperate with the seal to prevent movement of liquid through the valve body when the sealing member engages the seal; a reset member positioned within the valve body between the rotating stem and the seal, the reset member sized to fit within the central chamber while permitting liquid to move through the central chamber about the reset member and permitting the reset member to move laterally within the central chamber between the stem and the seal; the reset member sized to cooperate with the seal to prevent movement of liquid through the check valve when the reset member engages the seal; the rotating stem including an eccentric portion that selectively engages the reset member as the stem is rotated, the stem being moveable between a first rotational position where the eccentric portion engages the reset member and presses the reset member against the seal, and a second rotational position where the eccentric portion is disengaged from the reset member and the reset member is free to move within the central chamber between the stem and the seal; wherein the reset member is sized to extend through the seal and engage the sealing member to urge the sealing member toward the first end away from the seal.