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US 11,651,798 B2Granted
Base member and method of manufacturing the same, spindle motor, and hard disk drive device
AssigneeMINEBEA MITSUMI Inc.
InventorsAkihiko Suzuki, Tadashi Akahori
Life of this patent
Estimating the term…
Abstract
A base member serving as a part of a housing of a hard disk drive device. The base member includes a base body being a cast product, a machined surface obtained by machining a part of the base body at a side of an interior of the housing, an impregnating agent filled into a casting cavity exposed at the machined surface, and a coating film covering a surface including the machined surface of the base body.
Claims10
A base member serving as a part of a housing of a hard disk drive device, the base member comprising:
- a base body being a cast product;
- a machined portion and a casting surface equipped on the base body;
- an impregnating agent filled into a casting cavity exposed at the machined portion, wherein the impregnating agent is filled into the casting cavity by a vacuum impregnation process;
- and
- a coating film covering a surface including the machined portion of the base body,
- wherein on the casting cavity exposed at the machined portion, the impregnating agent is also filled in the casting cavity having an outermost diameter being equal to or smaller than 20 μm.
3 more elements
A base member serving as a part of a housing of a hard disk drive device, the base member comprising:
- a base body being a cast product;
- a machined portion and a casting surface equipped on the base body;
- a first casting cavity exposed at the machined portion, the first casting cavity having an outermost diameter being equal to or smaller than 20 μm;
- a second casting cavity exposed at the machined portion, the second casting cavity having an outermost diameter being larger than 20 μm;
- an impregnating agent filled into both first and second cavities, wherein the impregnating agent is filled into the first and second cavities by a vacuum impregnation process;
- and
- a coating film covering a surface including the machined portion of the base body.
4 more elements
Dependencies are inferred from the claim text.