| 摘要 |
PURPOSE:To enable usage under such condition where there is no difference of cracking pressure by forming the valve body of a check valve to be employed in an ink jet printer into a ring while allowing unilateral flow of fluid through open/close function of a flow path by means of the valve body. CONSTITUTION:In a check valve 4, a discharge side cover body 7 is screwed through an O-ring 6 to one end while surrounding a valve seat member 5 and a suction side cover body 9 is secured through an O-ring 8 to the other end thus to form a circular valve box 11 with the cover bodies 7, 9 and the valve seat member 5. The valve seat member 5 is provided with the flow paths 5a, 5b and plural flow paths 5c to form a flow path 12 penetrating through the valve box 11 by means of said paths 5a, 5b, 5c, 7a, 7b, 9a. A valve body 13 made of a resilient member such as rubber is fitted in the flow path 5b to contact the outercircumferential section 13a against the outercircumferential face of the flow path 5b and to contact the innercircumferential section 13b against the innercircumferential face of the flow path 5b while inclining toward the cover body 7 side thus to assemble the valve body 13 while facing against the flow path 7b. |
