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:
Jun. 29, 1993
Filed:
May. 04, 1992
Franz Plisek, Erlangen, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
An acoustic pressure pulse generator has a pressure pulse source in the form of a concussively driveable membrane, the membrane limiting a volume within the generator which contains a liquid acoustic propagation medium, the generator also having a wall therein spaced from the membrane, the wall dividing the volume into two sub-volumes. The acoustic propagation medium is circulated through an inlet in one of the sub-volumes and an outlet in the other sub-volume, with the two sub-volumes being in fluid communication via a flow restrictor through which the acoustic propagation medium flows. The restrictive effect of the flow restrictor is dimensioned so that the acoustic propagation medium contained in the sub-volume between the wall and the membrane is maintained at a pressure for effecting return of the membrane to its initial position after the membrane has been concussively driven.