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:
Feb. 24, 1976
Filed:
Jul. 12, 1973
Ormond L Henry, Muskegon, MI (US);
Raymond P Smith, Southfield, MI (US);
D & H Industries, Inc., Oxon Hill, MD (US);
Abstract
A tooth polishing device wherein a polishing tool is secured to a power drive assembly and the power drive assembly is pivotably mounted in a casing for rotational movement within the casing. A power supply means includes a switch and is coupled to the power drive assembly for supplying electrical power thereto. The switch includes a biasing means, for example, a leaf spring contact, biasing the power drive means to one rotational position within the casing. The switch is open when the power drive is in the one position and is closed when the power drive means is moved rotationally to a second position. The spring contact is mounted on the motor of the power drive assembly and bears against the bottom portion of the casing. The casing is sealed, and is provided with a battery for operating the power supply assembly. Recharging contacts are provided in the casing for recharging the battery when the polishing device is not in use. The battery and power supply are mounted in tandem within the casing which is elongated in shape to facilitate holding and operation of the polishing device. A novel gear reducer is provided in the power drive assembly.