초록 ▼

An air-driven dental scaler is provided with a vibrator assembly which comprises a rigid vibrator body having an inner disk-like chamber in which a disk-like rotor is received with a small gap between it and the chamber. The vibrator body is provided with a plurality of inlet ports which are arrange

An air-driven dental scaler is provided with a vibrator assembly which comprises a rigid vibrator body having an inner disk-like chamber in which a disk-like rotor is received with a small gap between it and the chamber. The vibrator body is provided with a plurality of inlet ports which are arranged in such a manner that a jet of air impinges upon the cylindrical outer surface of the rotor in a substantially tangential direction to cause the rotor to rotate. As the rotor rotates, it strikes or rolls on the side walls of the chamber to impart a vibratory movement to the vibrator body, which movement is transmitted through a shaft to a scaler tip. The air leaves the chamber through an exhaust port provided, preferably, in one of the side walls of the chamber. The rotor is, preferably, provided with a central opening to enhance the exhaust efficiency.

대표청구항 ▼

A vibrator comprising: a substantially rigid vibrator body having a chamber therein defined by a cylindrical peripheral wall and a pair of parallel flat side walls perpendicular thereto, the distance between said side walls being smaller than the inner diameter of said cylindrical peripheral wall, s

A vibrator comprising: a substantially rigid vibrator body having a chamber therein defined by a cylindrical peripheral wall and a pair of parallel flat side walls perpendicular thereto, the distance between said side walls being smaller than the inner diameter of said cylindrical peripheral wall, so that said chamber has a disk-like shape, said body having at least an exhaust port opening from said chamber on at least one of said side walls; a rotor received freely within said chamber, said chamber being substantially of greater height than said rotor, said rotor having a cylindrical peripheral surface and a pair of opposite side surfaces facing, respectively, said peripheral and side walls of the chamber, the diameter of said cylindrical surface being slightly smaller than the inner diameter of said cylindrical wall, so as to form a gap therebetween during operation of the vibrator, and; means for ejecting a flow of gaseous working fluid under pressure on said cylindrical peripheral surface of the rotor in a direction substantially tangential to said surface, adequate to cause said rotor to rotate within said chamber with its cylindrical surface spaced by said gap from the cylindrical wall of the chamber, but with its edges in contact with or striking said flat side walls, thereby imparting a vibratory movement to said vibrator body.