Kabushiki Kaisha Morita Seisakusho

Hiroo Watanabe

Shozo Nakayama

Kenzo Kataoka

Teruji Nakai

Haruo Ogawa

Katsumi Suzuki

Toshiki Tawa

Shusuke Hashimoto

A control device for use in an air turbine dental handpiece comprising an air turbine which is integrated with a spindle supporting a cutting tool and is rotatably supported in a head housing by bearings, an air supply passage which supplies compressed air to the air turbine and an exhaust passage which discharges air spent to drive the air turbine, the control device being characterized in that the control device comprises a pressure or flowrate regulating device disposed in the exhaust passage to control the speed of the turbine in the range of stop to high-speed operation by changing the back pressure of the air turbine.

Dental handpiece control device

A speed change device arranged such that a driving shaft connecting with a driver and a tool working shaft connected with a driven tool are connected with each other for transmission of torque in the no speed change mode or in the speed change (acceleration or deceleration mode and wherein a manipulating sleeve on the outer periphery of the handpiece case is used for selecting either the no speed change or the speed change mode thereby saving the expense of providing alternative devices for the individual modes of torque transmission.

Speed change device for medical handpiece

This disclosure relates to an improved method for driving a hand-piece of the air drive type to improve its cutting performance, and to increase its cutting load in a low range of rotational speed in particular, and also relates to a device for practicing the method. The disclosed method employs compressed high-velocity fluid exhausted to one side of an annular space in which blades rotate after having once been jetted at said blade guided along the rotating direction of said blades and then causing it to reenter the annular space in a diagonal direction with respect to the rotational direction of the blades for further driving the running blades in the same sense. The device includes a simply machined ring-shaped adapter.

Driving method and device for dental hand-piece

A chuck device for a dental handpiece comprising fixedly mounting a front collar inside a rotor at the end thereof for the dental handpiece and threadedly and detachably fixing a cartridge chuck behind said front collar inside of said rotor, said cartridge chuck comprising a substantially cylindrical chuck case provided at the rear end with an engagement portion for detachably connecting a cutting tool thereto, a synthetic rubber chuck body press inserted into the end side of said case, and a rear collar fixedly mounted behind said chuck body inside said case.

Growing community of inventors

Kyoto, Japan

Hiroo Watanabe