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:
Feb. 11, 2020
Filed:
Jan. 10, 2019
Nidec Corporation, Kyoto, JP;
NIDEC CORPORATION, Kyoto, JP;
Abstract
A base plate defines a portion of a housing of a disk drive device. The housing accommodates therein a disk, a spindle motor that rotationally drives the disk about a center axis that extends in a vertical direction, and an access portion that carries out at least one of reading or writing of information with respect to the disk. The base plate includes a cast metal base body and an electrodeposition coating film that covers the surface of the base body. The base body includes a bottom plate portion extending from the center axis to an outward in a radial direction and a wall portion with a rectangular or substantially rectangular shape viewed in the axial direction upward from an outer circumference portion of the bottom plate portion. An outside surface of the wall portion includes a coated surface covered with the electrodeposition coating film, a processing surface which is flat and on which a casting material is exposed from the electrodeposition coating film, and a parting line. The processing surface extends in the axial direction in contact with the parting line or across the parting line.