PROBLEM TO BE SOLVED: To provide a liquid tank which permits a gas passageway to be prevented from being clogged and a dental apparatus equipped with the liquid tank.SOLUTION: The liquid tank 20 having a storage space 200 in which a liquid L to be externally supplied is stored, includes a tank body 21 having a mouth portion 22 having an opening 23 formed, a cap 25 mounted on the mouth portion 22 and closing the opening 23, a liquid passageway through which the liquid L in the liquid tank 20 flows externally, a gas passageway 48 having a gap 24 generated between the mouth portion 22 and the cap 25 and a route 41 communicating with the gap 24 and the storage space 200, a liquid flowing valve 30 provided on the liquid passageway and permitting or preventing external flow of the liquid L, and an aeration valve 45 provided on the gas passageway 48 and compensating for negative pressure generated in the storage space 200.COPYRIGHT: (C)2013,JPO&INPIT【課題】気体通路が詰まるのを防止できる液体槽及び、この液体槽を備える歯科用機器を提供すること。【解決手段】外部に供給される液体Lが収容される収容空間200を有する液体槽20は、開口23を有する口部22が形成される槽本体21と、口部22に装着され開口23を閉じるキャップ25と、液体槽20内の液体Lが外部に向けて流れる液体通路と、口部22とキャップ25との間に生じる間隙24、及び間隙24と収容空間200とに連通する経路41、を有する気体通路48と、液体通路上に設けられ、外部への液体Lの流れを許容し又は阻止する液流通弁30と、気体通路48上に設けられ、収容空間200内で発生する負圧を補償する曝気用弁45と、を備えている。【選択図】図2
