Patent Number: 7,824,247

Title: 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.

Inventors: Bar-Cohen; Yoseph (Seal Beach, CA), Badescu; Mireca (Arcadia, CA), Bao; Xiaoqi (San Gabriel, CA), Chang; Zenshea (Irvine, CA), Sherrit; Stewart (La Crescenta, CA)

Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration

International Classification: H02N 2/00 (20060101); E21B 3/00 (20060101); B24B 23/03 (20060101)

Expiration Date: 2019-11-02 0:00:00