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:
May. 30, 1995
Filed:
Aug. 18, 1993
Applicant:
Inventors:
Lothar Hartmann, Mainleus, DE;
Gerhard Buchholtz, Erlangen, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61B / ; A61B / ;
U.S. Cl.
CPC ...
12866301 ; 12866003 ; 601-4 ;
Abstract
An acoustic lens having a variable focal length for employment in an acoustic propagation medium has two lens walls, namely an entry wall and an exit wall at least one lens wall being deformable for varying the focal length, a lens liquid located between the lens walls, and a pressure compensation system which maintains the static pressure of the lens liquid the same as the static pressure of the acoustic propagation medium adjoining the deformable lens wall.