Patent ID: 6508270
Filing Date: 2003-01-21
Classification: F16K,Y10T

Abstract:
A shut-off valve, comprising:an air passage (41) having a flat and substantially cylindrical shape in cross section formed by a first cladding sheet (43a), and a second cladding sheet (43b), the first and the second cladding sheets (43a), (43b) being opposed to each other and being sealed to each other by means of closing members (43e), (43f); a first opening (43c) at an inner end of the air passage (41); a second opening (43g) at an outer end of the air passage (41); a valve body sheet (42) inside said air passage, the valve body sheet (42) having a fixed member (42a) secured to said second cladding sheet (43b), a first flap member (42b), and a second flap member (42c) with the fixed member (42a) disposed in the central position therebetween, both flap members being movable centering around the fixed member (42a), said first flap member (42b) serving to prevent air from flowing from the first opening (43c) to the second opening (43g) of said air passage (41) by the close contact between the first flap member (42b) and a surface (43i) of the first cladding sheet (43a) at the air passage side, and said second flap member (42c) serving to prevent air from flowing from the second opening(43g) to the first opening (43c) of the air passage (41) by the close contact with the second flap member (42c) and the surface (43i) of the first cladding sheet (43a) at the air passage side.