NASA NTRS · 20110000776
Portable rapid and quiet drill
Abstract
A hand-held drilling device, and method for drilling using the device, has a housing, a transducer within the housing, with the transducer effectively operating at ultrasonic frequencies, a rotating motor component within the housing and rigid cutting end-effector rotationally connected to the rotating motor component and vibrationally connected to the transducer. The hand-held drilling device of the present invention operates at a noise level of from about 50 decibels or less.
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Bar-Cohen, Yoseph, Badescu, Mireca, Bao, Xiaoqi, Chang, Zenshea, Sherrit, Stewart. 2010-11-02. Portable rapid and quiet drill. https://ntrs.nasa.gov/citations/20110000776
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