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. 30, 1998
Filed:
Jul. 29, 1997
Applicant:
Inventor:
Ian R McLean, Chatham, CA;
Assignee:
Siemens Electric Limited, Ontario, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02M / ;
U.S. Cl.
CPC ...
12318457 ;
Abstract
A variably tuned Helmholtz resonator which has a connection establishing fluid communication between fixed volume chamber and a duct of an induction system for an internal combustion engine. The tubular connection has a special configuration which affects changes in open area and length of the tubular connection so as to create a linear relationship between the resonant frequency and the angular position of the tuning plate. The tuning plate is positioned correspondingly to engine speed to provide noise attenuation over a wide range of engine speeds.