Patent ID: 9328829
Filing Date: 2016-05-03
CPC Classification: F16K

Claim Text:
1. A two-way valve comprising: a body including a pair of first and second ports through which a pressure fluid is supplied and discharged, flow passages connected to the first port and the second port; a partition member formed midway in the flow passages and separating the first port and the second port; a diaphragm valve having a main body portion disposed displaceably in the body and which is seated on a valve seat formed on an end of the partition member, wherein communication between the flow passages is interrupted by seating of the main body portion on the valve seat; a skirt portion formed as a thin film on an outer circumferential side of the main body portion and which is retained by the body, an outer edge of the skirt portion projects perpendicularly with respect to a direction of extension of the skirt portion; and a protective body made of a resilient member, which alleviates a load applied to the skirt portion by being disposed in intimate contact with the skirt portion, wherein the diaphragm valve is connected to one end of a shaft disposed displaceably in an axial direction, and a spring that urges the diaphragm valve toward the valve seat is disposed on a piston connected to another end of the shaft, and the main body portion includes, on a bottom portion thereof facing the valve seat, a first lip and a second lip that each abut against and cover a different respective side surface of the partition member when seated on the valve seat, wherein the skirt portion includes annular projections which project outwardly from an outer circumferential side surface of the outer edge of the skirt portion, the annular projections project in a direction of the flow passages and are configured to abut against the body, wherein the body includes an annular protrusion projecting in a direction perpendicular to the flow passages and configured to abut against the skirt portion as a position spaced apart from the outer edge of the skirt portion.