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. 30, 1988
Filed:
Jul. 08, 1987
Sylvester Oppelt, Bamberg, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
A shock wave generator for an apparatus for non-contacting disintegration of calculi in the body of a life form has a membrane of electrically conductive material which terminates a volume filled with a shock wave conducting medium, and a coil having windings disposed adjacent the membrane. The coil is connectable to a high voltage source with two terminals. For maintaining a long useful life of the membrane without significantly reducing the efficiency of converting electrical energy into shock wave energy, the membrane is provided with a potential such that a positive difference in potential is present between one terminal of the coil and the membrane, and a negative difference in potential is present between the other terminal of the coil and the membrane.