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:
Dec. 05, 2000
Filed:
Jul. 01, 1999
Mohamad S Qatu, Bloomfield Hills, MI (US);
Michael L Dougherty, Sr, Rochester Hills, MI (US);
Dana Corporation, Toledo, OH (US);
Abstract
Method and apparatus for suppression of fluid-borne noise in hydraulic or fluid handling systems, such as automotive power steering, power brakes, air conditioning and fuel systems wherein a multi-chamber solution to attenuate fluid-borne noise in the system is disclosed. This solution optimizes both damping, interference and wave cancellation mechanisms in a fluid system and consists of dividing an attenuator conduit hose or pipe assembly serially into tuning chambers by a restrictor or other mechanism. In some embodiments, a tuner is placed in each and every chamber. The number of chambers can vary between two and four depending on the objective of the attenuation. In order to attenuate the ripple at the pump, the tuner in the first or most upstream chamber can be removed.