| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a check valve which is high in sealability even if a valve body, energized to a valve seat by an energizing means, is made of an elastic material. <P>SOLUTION: The check valve 14 includes the valve seat 111 which includes a top opening 225b, the valve body 112 which abuts on the valve seat 111 to block the top opening 225b, and a compression coil spring 113 which energizes the valve body 112 to the valve seat 111. The valve body 112 includes a shutting part 114 and a circular projection 115 which abuts on the periphery of the top opening 225b. The circular projection 115 has a triangular radial section, and an angleαof abutment on the inner circumference side made between the valve seat 111 and a slope 115b on the inner circumference side is smaller than an angleβof abutment on the outer peripheral side made between the valve seat 111 and a slope 115c on the outer peripheral side. As a result, when the valve body 112 is energized to the valve seat 111, the deformation of the circular projection 115 can be so stipulated as to transform in a direction where an apex 115a is shifted to the outer peripheral side, therefore the sealability by the valve body 112 improves. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
