Patent ID: 8443837
Filing Date: 2013-05-21
Classification: B29C,F16L,Y10T

Abstract:
1. A coupling device comprising: a female joint having a first open/close valve and a male joint having a second open/close valve for connecting/disconnecting first and second fluid passages in first and second members; said female joint comprises a first valve casing fitted in a first fitting hole formed in the first member and having a first valve seat in a first leading end portion, a first valve body fitted in the first valve casing movably in an advancing/retreating direction and having in a first leading end part a first valve portion abutting on the first valve seat from an inside, and a first biasing means for biasing the first valve body toward a closing position; said male joint comprises a second valve casing fitted in a second fitting hole formed in the second member and having a second valve seat in a second leading end portion, a second valve body fitted in the second valve casing movably in an advancing/retreating direction and having in a second leading end part a second valve portion abutting on the second valve seat from an outside, and a second biasing means for biasing the second valve body toward a closing position; a surface of said first member and a leading end face of the first valve casing of the female joint are substantially flush with each other and a surface of said second member and a leading end face of the second valve casing of the male joint are substantially flush with each other; and a valve body drive means comprising a third fluid passage for driving the first and second valve bodies to the opening positions while leading ends of said first and second valve casings abut on each other is provided.