Patent ID: 7882986

Claim:
A liquid dispenser being mounted in a container having a top, a bottom and a mouth, and the liquid dispenser comprising a shell being hollow, being adapted to be mounted on the mouth at the top of the container and having a bottom; a top end; an injection tube being formed on and protruding longitudinally from the bottom of the shell and having an internal surface; an external surface; an upper end; and a discharge tube being formed longitudinally on the internal surface of the injection tube and having a top end; and a bottom end; and multiple air ports being formed through the shell between the bottom and the top end; a spout assembly being connected to and communicating with the discharge tube of the injection tube and having a spout being mounted on and protruding from the shell below the air ports, being connected to and communicating with the injection tube near the upper end and having an inner end being connected to the upper end of the injection tube and communicating with the discharge tube; and an outer end protruding from the shell; and a pick-up tube being connected to and extending longitudinally from the bottom end of the discharge tube and having an upper end connecting to and communicating with the discharge tube; and a lower end being open; an injection assembly being mounted in the shell and pumping air into the injection tube; a power pack being mounted in the shell and being electrically connected to the injection assembly; and an activating assembly being mounted on the top end of the shell, being electrically connected to the power pack, selectively sealing or opening an air passage to the injection tube and having a pressure release tube being mounted in the shell, being connected to the injection tube and having an air inlet being connected to the injection tube near the upper end opposite to the spout and communicating with the container through the injection tube; and an air outlet extending to the top end of the shell and having a relief valve seat; a switch being movably mounted in and protruding from the top of the shell, activating the injection assembly and having a bottom; and a central mounting tube being formed on and protruding from the bottom of the switch and extending toward the relief valve seat on the air outlet of the pressure release tube; and a relief valve disk assembly being mounted in and protruding from the central mounting tube of the switch, selectively opening or closing the relief valve seat on the air outlet of the pressure release tube and having a shaft being mounted in and protruding from the central mounting tube of the switch and having a distal end; and a valve disk being mounted on the distal end of the shaft, closing the relief valve seat when the switch is pressed and opening the pressure release tube when the switch is released.