PROBLEM TO BE SOLVED: To provide a check valve device capable of securing both of durability and sealing performance.SOLUTION: A check valve device 3 is a valve device for preventing back flow which can restrict the flow of fluid passing through a fluid flow port 34a formed in a passage wall 34 to one direction. The check valve device 3 includes a valve shaft part 30 slidably supported by the passage wall 34, a valve head part 31 which is a flange portion protruded from the valve shaft part 30 to receive a fluid pressure and contacted and separated to and from a valve seat so as to shut off and allow passing of the fluid through the fluid flow port 34a, and a seal part 32. The seal part 32 is arranged on a side confronting the valve seat in the valve head part 31, and is elastically deformed to shut off passing of the fluid through the fluid flow port 34a in valve closing. The seal part 32 is a sheet made of a soft material having a thickness dimension in a sliding direction of the valve shaft part 30 equal to or less than the valve head part 31, and is formed on the valve head part 31 by integral molding.

    【課題】耐久性及びシール性能の両方を確保できる逆止弁装置を提供する。【解決手段】逆止弁装置3は、通路壁34に形成された流体流通口34aを通過する流体の流れを一方向に制限可能な逆流防止用の弁装置である。逆止弁装置3は、通路壁34に摺動可能に支持されるバルブ軸部30と、バルブ軸部30から突出して流体圧力を受ける鍔状部分であって弁座に対して接触、離間して流体流通口34aの流体通過を遮断、許容するバルブ頭部31と、シール部32と、を備える。シール部32は、バルブ頭部31において弁座に対向する側に配される部分であって、閉弁時に弾性変形して流体流通口34aの流体通過を遮断する。シール部32は、バルブ頭部31と比べて、バルブ軸部30の摺動方向の厚さ寸法が同等以下かつ柔らかい材質であるシート状であって、バルブ頭部31に一体成形により形成されている。【選択図】図3


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    Title :

    CHECK VALVE DEVICE AND EVAPORATED FUEL SUPPLY SYSTEM WITH THE SAME


    Additional title:

    逆止弁装置及びこれを備える蒸発燃料供給システム


    Contributors:

    Publication date :

    2015-08-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F16K VALVES , Ventile



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