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:
Aug. 31, 1999
Filed:
Mar. 13, 1998
Satinder K Nayar, Woodbury, MN (US);
Haregoppa S Gopalkrishna, Woodbury, MN (US);
Joseph M D'Sa, Woodbury, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
An acoustic horn imparts energy at a selected wavelength, frequency, and amplitude. The horn has at least one nodal plane and a natural frequency of vibration. The horn has an outer surface and at least one cutout located in the outer surface. The cutout is located at a longitudinal location on the surface that does not contact the nodal plane. The horn length is a function of the shape, size, number, and location of the cutouts, and is less than the length of a solid horn having the same natural frequency of vibration. The horn can vibrate at a natural frequency and the length of the horn can be less than one-half wavelength of vibration.