Patent ID: 7441747
Filing Date: 2008-10-28
Classification: F16K

Abstract:
1. A vacuum gate, comprising: a gate box, having a storing space, wherein valve holes are provided at front and rear portions of the gate box, a plurality of first holes is provided at a bottom portion of the gate box connecting to the storing space, and the valve holes are used respectively to integrate with a vacuum chamber; a gate door, installed at the storing space of the gate box; a plurality of flexible sealed tubes, wherein top portions of the flexible sealed tubes are connected respectively to the bottom portion of the gate box, and the flexible sealed tubes are connected with first holes of the gate box, at least one swinging device is provided at a bottom part of the flexible sealed tubes to connect the flexible sealed tubes together, and a second pilot wheel is provided at right and left sides of the swinging device; at least one pneumatic cylinder, positioned at the bottom portion of the gate box, wherein a piston rod is coupled to a bottom part of the pneumatic cylinder and moves up and down along vertical axis of the pneumatic cylinder; a pair of first supporting boards, located at the bottom portion of the gate box, wherein each of the first support boards has a first guiding trench and a second guiding trench, the first guiding trench comprises a long rectangular shaped trench in a vertical direction, and at a top part of the rectangular shaped of trench is connected to a horizontal trench with chamfered edges in a horizontal direction, the second guiding trench is formed in the horizontal direction and is located at the top of the horizontal trench of the first guiding trench, the second pilot wheels are rolled along the second guiding trench in the horizontal direction; a link structural board, having at least one second hole and a third pilot wheel located on both sides of the second hole, wherein the two third pilot wheels roll respectively within the first guiding trench in the vertical direction and the horizontal trench in the horizontal direction; a thrust board, wherein a gap is formed at a pivotally coupled portion of the thrust board and a backside of the link structural board, a first pilot wheel is located at both sides of the thrust board respectively, and the two first pilot wheels are rolled within the first guiding trench, a piston rod is passed through the second hole and is coupled to one side of the thrust board, a coupled part of the piston rod and thrust board passes a first central line of the two first pilot wheels located on both sides of the thrust board; and a plurality of transmission rods, passing through the first holes, the flexible sealed tubes and the swinging device, wherein a top part of the transmission rods are located at the bottom portion of the gate box, and a bottom part of the transmission rods are positioned at a top portion of the link structural board, a connecting portion of the transmission rod and the link structural board passes a second central line of the two third pilot wheels located at both sides of the link structural board, when the third pilot wheels are rolled inside the horizontal trenches respectively, the first central line is shifted to the front of the second central line, and the gate door closes the valve hole positioned at the front portion of the gate box.