Patent ID: 8056767
Filing Date: 2011-11-15
Classification: B05B

Abstract:
1. A discharge container, comprising a container main body, a discharge pump for discharging a contained liquid from a nozzle, and a fixing cap, wherein the discharge pump comprises a cylinder member made of a large-diameter cylinder and a small-diameter cylinder having an inlet pipe at a lower end, a piston member mounted on the cylinder member, and a nozzle head, the piston member comprises: a piston that is engaged with the small-diameter cylinder internally so as to slide freely and includes a tube portion and a first engaging flange installed on an upper outer circumference of the tube portion; a poppet valve engaged with the piston; a piston guide that is engaged with an upper end of the piston, and includes an outer tube portion, a partition plate disposed on an inner circumference of the outer tube portion and an inner tube portion installed vertically from a lower face of the partition plate; an air piston that is provided with an inner tube portion engaged with an outer circumference of the piston guide, an upper wall portion having an air hole, and a sliding tube portion engaged with the large-diameter cylinder internally so as to slide freely, thus forming an air chamber inside the large-diameter cylinder; an air piston valve engaged with a lower external circumference of the inner tube portion to open and close the air hole of the air piston; and a stem that is provided with a lower tube portion engaged with an upper part of the piston guide to form a gas-liquid mixing chamber including a ball valve inside the upper part of the piston guide and also engaged with an upper inner tube of the inner tube portion so as to slide freely and a mesh ring mounted on an upper inner circumference; further wherein the outer tube portion of the piston guide is provided with an upper tube portion, a diameter-expanding tube portion, a lower tube portion, and a second engaging flange in descending order, an inner circumference of the lower tube portion is engaged with the upper outer circumference of the tube portion of the piston, the second engaging flange is installed at a lower end of the diameter-expanding tube portion and engaged with an upper face of the first engaging flange of the piston, an outer circumference of the inner tube portion is engaged with the inner circumference of the lower tube portion at the outer tube portion and is engaged with an upper part of an inner circumference of the tube portion of the piston, thereby the piston guide is fitted and attached to the upper part of the piston, the nozzle head is mounted on an outer circumference of the stem, and a vent hole is drilled in a circumference wall of the large-diameter cylinder, and the vent hole is opened or closed by vertical movement of the sliding tube portion, thereby preventing the container main body from being made negative in pressure by a suction of the contained liquid thereinside.