Patent ID: 9611940
Date: 2017-04-04
CPC Classifications: F16K

Claim:
1. A gate valve provided to a gate allowing a workpiece to enter or leave a chamber, comprising: a main body which has a primary surface; and a sealing member which comes into contact with a peripheral edge of said gate when said gate valve is closed, said sealing member including a protruding first section and a protruding second section both which are disposed to extend along a peripheral edge of said main body and protrude from said primary surface when said gate valve is open, a protrusion amount of said first section from said primary surface being greater than a protrusion amount of said second section from said primary surface, said first section being disposed inwardly from the second section with respect to a peripheral edge of said primary surface, and said second section having an outer peripheral sloping surface that slopes down from a top of the protruding amount of said second section towards the peripheral edge of said main body adjacent to said second section.