Patent ID: 6830081
Filing Date: 2004-12-14
Classification: B65D,F04B

Abstract:
A vacuum box comprising:a lower box; an upper cover; an isolating layer installed on a top of the upper cover for sealing a seal layer on the lower box; the isolating layer having a check valve and a pressure relief valve; a pump unit installed on the isolating layer; the pump unit including two pump tubes connected to the isolating layer through the check valve; each pump tube having a stud; and a gear set connected to the studs; a motor installed on the isolating layer for driving the motor; a battery set installed on the isolating layer for supplying power to the motor; a control button installed on the upper cover for opening or closing a power to the box; wherein the isolating layer is installed with a pressure display unit; the pressure display unit is formed by a pressure button installed in a pressure hole of the isolating layer by an airtight ring, a spring below the pressure button; a sealed airbag installed at a top cover of the pressure button and a periphery of the spring; and a display mask connected to the pressure button; the display mask is a sector transparent casing and is pivotally installed to ears of the isolating layer; a top of the display mask is mounted with at least two color indicators; a lower lateral side of the pressure button is installed with a sensing switch which sense the rising or descending of the pressure button.