PROBLEM TO BE SOLVED: To provide a check valve that sufficiently opens the slit of a valve to ensure sufficient flow rate of fluid when the fluid flows from an upstream side to a downstream side, and surely closes the slit of the valve when the fluid is going to flow from the downstream side D to the upstream side U, to thereby surely inhibit backflow of the fluid from the downstream side to the upstream side.SOLUTION: A support body is arranged between the opening part of an upstream side housing and the slit of a valve, and the closed top part of the support body is arranged at a substantially vertical position on the upstream side near the slit. The open hole of the support body is arranged at a position separate from the substantially vertical position of the upstream side U near the slit to a side part side.COPYRIGHT: (C)2015,JPO&INPIT【課題】液体を上流側から下流側へ流すときは、弁のスリットを十分に開いて液体の流量を十分に確保でき、液体が下流D側から上流U側へ流れようとするときは、弁のスリットを確実に閉じて、下流側から上流側への液体の逆流を確実に阻止することができる逆止弁を提供すること。【解決手段】上流側ハウジングの開口部と、弁のスリットとの間に、支持体を配置し、スリット近傍の上流側の略垂直位置に、支持体の閉塞した頂部を配置した。支持体の貫通孔は、スリット近傍の上流U側の略垂直位置から、側部側に離間した位置に配置した。【選択図】図4
