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:
Sep. 10, 1991
Filed:
May. 09, 1990
Applicant:
Inventors:
John L Butler, Marshfield, MA (US);
Arthur Clark, Adelphi, MD (US);
Assignee:
Image Acoustics, Inc., North Marshfield, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310334 ; 310 26 ; 310328 ; 310323 ;
Abstract
A hybrid transducer having mass and compliance loading for permitting operation at a lower frequency. The mass loading may include the use of one or more pistons to couple the energy to the medium. A ring configuration of the transducer is also disclosed. The ring moves with maximum motion at one position and minimum motion at a position 180.degree. thereto.