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. 14, 1991
Filed:
Nov. 09, 1989
Applicant:
Inventors:
Terrence A Dear, Elkton, MD (US);
Karl U Ingard, Kittery Point, ME (US);
Mark E Schuchardt, Pleasant Ridge, MI (US);
Assignee:
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E02M / ;
U.S. Cl.
CPC ...
181229 ;
Abstract
A silencer having multiple integrated channels arranged in a labyrinth configuration is provided. The channels have one open end and one closed end with the open end in communication with a common zone which is connected to a flow duct. The channels are tuned to provide a selected resonance frequency.