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:
Jul. 16, 2002
Filed:
Nov. 02, 2000
Raquib Uddin Khan, Pleasanton, CA (US);
Matt Loren Shumway, San Jose, CA (US);
Susan Feng Fan, Santa Clara, CA (US);
Other;
Abstract
A disc drive spindle motor includes a fixed member coupled to the chassis, and a rotor rotatable about the fixed member for rotating a magnetic storage disc in the contaminant free cavity. A bearing, which may be a hydrodynamic bearing, ball bearing or other bearing type, interconnects the fixed member and the rotor, and supports the rotor for rotation relative to the fixed member. A simple condensation seal is supported from either the fixed member or the rotor, adjacent the bearing opening where outgassing may occur. The seal incorporates a cooling surface which is supported from either the hub/rotor or the fixed member adjacent the region where outgassing occurs; the surface preferably should be wavy, or fin shaped to provide a maximum surface area for better heat transfer and better cooling effect, so that the surface is relatively cooler than the surrounding operating environment. The surface is shaped and made of a material, e.g. aluminum, and of a thickness to optimize the heat transfer characteristics, so that the hot volatile products of the outgassing phenomenon will condense when they come in contact with the condensation seal surface.