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:
Mar. 29, 1994
Filed:
Dec. 28, 1992
Applicant:
Inventors:
Paul Lieberman, Torrance, CA (US);
Ronald W Bocksruker, Los Angeles, CA (US);
Assignee:
National Technical Systems, Calabasas, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B06B / ; G01N / ;
U.S. Cl.
CPC ...
1161 / ; 73571 ;
Abstract
A noise generator is created by having a high pressure gas applied to a Mach 2 nozzle which is combined in an adjustable nozzle assembly with a resonance tube of adjustable length with a closed end forming a Mach disk between them. The resultant compression and expansion shock wave oscillations exit the resonance tube and are propagated between reflecting domes which direct the generated noise around a test article in a housing which contains the generated noise. A muffler includes a water spray chamber and baffled bulkheads to dissipate the generated noise.