Patent ID: 9439831
Filing Date: 2016-09-13
CPC Classification: A45D,A47K,A61H,E03C

Claim Text:
1. An apparatus for containing and subsequently discharging liquid comprising: a container with an inner surface and an open top; a bottom discharge drain opening in the container communicating with a discharge duct; a liner in the form of a thin flexible material applied over the inner surface to contain the liquid within the liner and to cover the drain opening; the drain opening being closed by the liner so that liquid within the container applies downward pressure on the liner at the drain opening; a sealing member mounted in the duct downstream of the drain opening; the sealing member being operable to move to a sealing position in which air flow through the duct from the discharge opening is prevented so as to form a back pressure underneath the liner to counter the downward pressure on the liner from the liquid and so as to prevent the downward pressure from rupturing the liner; the sealing member being operable to move to an open position in which air flows through the duct to discharge so as to release the back pressure; the liner being arranged relative to the discharge opening such that release of the back pressure causes the liner at the discharge opening to rupture in response to the downward pressure from the liquid thereby allowing the liquid to pass through the discharge opening to the duct.