The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 1988
Filed:
Jul. 26, 1985
Shozo Nakayama, Kyoto, JP;
Hiroo Watanabe, Kyoto, JP;
Toshiki Tawa, Kyoto, JP;
Shusuke Hashimoto, Osaka, JP;
Katsumi Suzuki, Kyoto, JP;
Teruji Nakai, Kyoto, JP;
Kabushiki Kaisha Morita Seisakusho, Kyoto, JP;
Abstract
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.