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. 20, 2006
Filed:
Apr. 24, 2001
Gail M. Cunningham, Oxford, MI (US);
Gail M. Cunningham, Oxford, MI (US);
Dana Corporation, Ottawa Lake, MI (US);
Abstract
A method of dampening fluid-borne noise in an automotive power steering system in accordance with a presently preferred embodiment of the invention contemplates provision of a power steering fluid hose having a laminated inner tube surrounded by a reinforcing outer tube. The inner tube has a resilient inner layer with a radial thickness Tand a resilient outer layer with a radial thickness T. The inner layer is softer than the outer layer and is bonded by vulcanization to the outer layer. The radial thicknesses Tand Thave a ratio selected to dampen fluid-borne noise within a preselected frequency range by elastic expansion of the inner and outer layers.