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. 23, 2000
Filed:
Oct. 23, 1998
Hans Leuthold, Santa Cruz, CA (US);
Alan Lyndon Grantz, Aptos, CA (US);
Matt L Shumway, San Jose, CA (US);
Norbert S Parsoneault, Scotts Valley, CA (US);
Etoli Wolff, Sunnyvale, CA (US);
Michael D Kennedy, Boulder Creek, CA (US);
Samnathan Murthy, Santa Cruz, CA (US);
Raquib U Khan, Pleasanton, CA (US);
Mohamed M Rahman, San Jose, CA (US);
Wesley R Clark, Watsonville, CA (US);
Seagate Technology, Inc., Scotts Valley, CA (US);
Abstract
A bimetallic part is formed from metals or comprises metals with different thermal expansion coefficients. A first element defines the part and defines one surface of the bearing gap and has a first coefficient of expansion and a second element is wholly or partially inserted into and constrained within the first element and having a different coefficient of thermal expansion so that as the temperature changes, the stress created by the differential expansion of the two elements will cause the overall part to deform elastically as a function of temperature. This deformation will cause the gap, the elements being properly selected, to narrow as temperature rises (and viscosity falls) and to widen as temperature falls (and viscosity rises).