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:
Jan. 28, 1997
Filed:
Jun. 20, 1994
Applicant:
Inventor:
Michael J Young, Ashburton, South Devon, TQ13 7JX, GB;
Assignee:
Other;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B24B / ; B24B / ;
U.S. Cl.
CPC ...
451165 ; 451 41 ;
Abstract
An apparatus producing an aperture through a workpiece of brittle material such as ceramic or glass which includes a piezo electric transducer to generate longitudinal vibrations at a frequency within the range 20-40 kHz, and transmit the vibrations to a tip adapted to contact the workpiece. Additionally a motor generates small amplitude movements of the tip at a frequency in the range of 10-100 Hz in a plane transverse to the direction of the longitudinal vibrations.