PROBLEM TO BE SOLVED: To provide a check valve capable of improving attachment workability of an annular seal member and a negative pressure valve with respect to a valve body constituting a positive pressure valve.SOLUTION: The check valve of this invention includes a valve case 20 having a positive pressure valve seat, a positive pressure valve 50 having a negative pressure valve seat, a spring 53 for energizing the positive pressure valve 50, and a negative pressure valve 55 made of an elastic resin material. The positive pressure valve 50 has a valve body 60, and an annular seal member 75 attached to the valve body 60 and contacting and separating from the positive pressure valve seat, and the valve body 60 includes a first installation surface 65 on which the annular seal member 75 is installed, and a second installation surface 66 provided on an inner diameter side thereof and having the negative pressure valve seat so that the negative pressure valve 55 is installed thereon. Further, a holding cap 80 fastening the annular seal member 75 between the first installation surface 65 of the valve body 60 and it and fastening the negative pressure valve 55 between the second installation surface 66 and it is attached to the positive pressure valve 50.SELECTED DRAWING: Figure 1
【課題】正圧弁を構成する弁本体に対する環状シール部材及び負圧弁の組付け作業性を向上させる、チェックバルブを提供する。【解決手段】このチェックバルブは、正圧弁座を有するバルブケース20と、負圧弁座を有する正圧弁50と、正圧弁50を付勢するスプリング53と、弾性樹脂材料からなる負圧弁55とを備え、正圧弁50は、弁本体60と、弁本体60に組付けられ、正圧弁座に接離する環状シール部材75とを有し、弁本体60は、環状シール部材75が設置される第1設置面65と、その内径側に設けられ、負圧弁座が形成されると共に、負圧弁55が設置される第2設置面66とを有しており、更に正圧弁50には、弁本体60の第1設置面65との間で環状シール部材75を挟持し、かつ、第2設置面66との間で負圧弁55を挟持する、押えキャップ80が装着されている。【選択図】図1
CHECK VALVE
チェックバルブ
16.05.2016
Patent
Elektronische Ressource
Japanisch
IPC: | F16K VALVES , Ventile / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF |