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. 26, 1995
Filed:
Jan. 27, 1993
Hiroshi Kanazawa, Hitachi, JP;
Fumio Tajima, Ibaraki, JP;
Ryoichi Naganuma, Katsuta, JP;
Nobuyoshi Mutoh, Katsuta, JP;
Tadashi Takahashi, Hitachi, JP;
Hideki Nihei, Hitachiota, JP;
Shunichi Tanae, Hitachi, JP;
Hideaki Horie, Hitachi, JP;
Syooichi Kawamata, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A portable-type disk apparatus for a 3.5-inch or less optical disk implemented in a thin, light-weight and miniaturized structure having a vibration-withstanding capability. An optical head assembly is disposed stationarily while an optical disk and a spindle motor for rotating the optical disk are disposed movably in a diametrical direction of the optical disk. The spindle motor is constituted by a brushless motor of a substantially semi-circular form in cross section and having a laterally truncated portion. The optical head assembly including an optical head and a laser circuit is disposed at the side of the laterally truncated portion.