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:
Jul. 29, 2003
Filed:
Mar. 22, 2002
Hayato Shimizu, Ryugasaki, JP;
Masao Iwakura, Odawara, JP;
Shigeo Nakamura, Odawara, JP;
Kazuo Sakai, Chiyoda, JP;
Shigenori Togashi, Abiko, JP;
Masayuki Kaiho, Chiyoda, JP;
Toshiaki Kobari, Chiyoda, JP;
Mikio Tokuyama, Tsukuba, JP;
Satomitsu Imai, Odawara, JP;
Shozo Saegusa, Chiyoda, JP;
Masahiko Sega, Hiratsuka, JP;
Toshihisa Okazaki, Odawara, JP;
Yuzo Yamaguchi, Shimonoseki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A magnetic disk apparatus arranged in a housing having a plurality of magnetic disks stacked on a rotating shaft, arms supporting thereon magnetic heads and adapted to be inserted between said magnetic disks, a rotary actuator for moving the arms, a housing forming at least a part of an arcuate-shaped shroud which substantially surrounds a portion of side surfaces of the magnetic disks so as to permit movement of the arms and which is concentric with the magnetic disks so as to define a gap between the shroud and the portion of the side surfaces of said magnetic disks. The gap defined between the outer peripheral end surfaces of the magnetic disks and the shroud is in a range of 0.1 mm to 0.6 mm.