Liquid supply

摘要

A liquid supply (30, 130, 330) includes a lever (48, 348) that moves in response to expansion and contraction of a variable chamber (42, 342) within a liquid reservoir (56, 356). Movement of the lever (48, 348) moves a ball (52, 352) or sealing member (154, 354) to open or close an opening (60, 360) out of the liquid reservoir (56, 356).

主权项

1. A liquid supply comprising:
a housing enclosing a liquid reservoir and having an opening between the liquid reservoir and outside the housing; a variable chamber within the liquid reservoir, the variable chamber in communication with a pump to selectively inflate and deflate the variable chamber; a lever movable in response to expansion and contraction of the variable chamber; a ball between the lever and the opening, the ball being movable between a first position in which the opening is sealed and a second position in which the opening is unsealed; a sealing member between the ball and the opening, the sealing member being movable to a sealed position over the opening when the ball is in the first position and an unsealed position spaced from the opening when the ball is in the second position; and a spring resiliently biasing the lever against the ball to resiliently bias the ball towards the first position.