Patent ID: 9062770
Filing Date: 2015-06-23
Classification: B23B,F16J

Abstract:
1. A sealing device comprising: a tensioning nut comprising a sealing washer being annular, formed as a single part, mounted in the stepped structure, and comprising a main sealing ring being elastic, mounted and positioned in the main ring groove and comprising a pressure space formed between the rear side of the main sealing ring and the sealing washer, wherein the tensioning nut further has a minor ring groove annularly concaved in the stepped structure; and a minor sealing ring is mounted in the minor ring groove and abuts the sealing washer, wherein the liquid-inlet surface is inclined radially outwardly with respect to the positioning surface of the main ring groove, and wherein the hole diameter of the tool shank hole is smaller at the rear section of the liquid-inlet surface than at the front section of the liquid-inlet surface.