Patent ID: 7131838

Claim:
Dental apparatus comprising: a fluid reservoir for containing fluid to be supplied to a dental handpiece, and having a connection part; a fluid reservoir receptor section having a reception part for receiving said connection part of the fluid reservoir; and a line for passing the fluid from said reception part toward the dental handpiece; said connection part of the fluid reservoir further comprising: a cylindrical member; a shaft member slidably arranged through the cylindrical member, and having a first axial channel formed in its outer surface; a fluid passage for passing the fluid defined between said first axial channel and an inner surface of the cylindrical member, and having an opening located in the fluid reservoir; and an air passage formed in the cylindrical member for taking external air into the fluid reservoir, and having an opening located in the fluid reservoir; wherein said openings of said fluid and air passages are openable by sliding the shaft member, and the shaft member is constantly thrusted to close said openings, said reception part of the fluid reservoir receptor section further comprising: an uptake-side passage in communication with the air passage of the connection part, and having an opening; a valve disposed in said opening of the uptake-side passage for preventing flow of the fluid or air out of the fluid reservoir and allowing external air to be taken into the fluid reservoir; and a releaser member for sliding the shaft member to open said openings of said fluid and air passages when the fluid reservoir is installed on the fluid reservoir receptor section.