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:
Oct. 30, 1990
Filed:
Dec. 01, 1988
Christopher Nowacki, Long Grove, IL (US);
Alfred G Brisson, Kildeer, IL (US);
Northgate Research, Inc., Arlington Heights, IL (US);
Abstract
Apparatus is provided for the extracorporeal destruction of kidney stones, and includes an ellipsoidal reflector. The reflector has a first focus point, and a second focus point, the reflector being truncated and the second focus point being disposed beyond the resulting open end of the reflector for coincidence with a kidney stone or the like. An extension from the apex of the reflector has a cavity with a spark gap therein. The cavity opens into the reflector, and the cavity and reflector are filled with liquid such as water. A spark produced across the spark gap produces a shock wave which moves to the first focus point of the reflector and is reflected to the second focus point.