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:
Sep. 23, 2014
Filed:
Dec. 02, 2013
Nidec Corporation, Kyoto, JP;
Toshihiro Hirasawa, Kyoto, JP;
Junya Mizukami, Kyoto, JP;
Nidec Corporation, Kyoto, JP;
Abstract
A base plate of a spindle motor includes a bottom plate portion and a wall portion. The bottom plate portion extends perpendicularly or substantially perpendicularly to a rotation axis. The wall portion extends in an axial direction from a radially outer edge portion of the bottom plate portion. The bottom plate portion includes a cup portion and an outer bottom plate portion. The cup portion is arranged radially inward of the wall portion, and includes a recessed upper surface. The outer bottom plate portion is arranged to extend between the cup portion and the wall portion. The base plate includes a first member made of a first type of metallic material, and a second member made of a second type of metallic material having a Young's modulus greater than that of the first type of metallic material.