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:
Jun. 01, 1976
Filed:
Jul. 23, 1973
Earl L Walls, La Jolla, CA (US);
Verl O Olson, La Mesa, CA (US);
Other;
Abstract
A hand control system for power hand tools comprises a manually operated control means for activating a low current electric signal and means for actuating an operation of the power tool. Circuit means are provided for sensing the low current electric signal when it is activated by the manually operated control means to provide a higher current operational signal to the tool actuating means. The manually operated control means may include various types of switch means. The finger-tip control means is located on a hand-piece unit of a power tool. The circuit means includes means for amplifying the low current electric signal and switching means for receiving an amplified current drive signal from the amplifying means and transmitting the higher current operational signal to the actuating means. A specific feature of this invention is the use of the manually operated control means in combination with a dental device having an air driven motor for tool members rotatably mounted in the hand-piece unit.