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. 12, 2008
Filed:
May. 16, 2005
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;
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 Global Storage Technologies Japan, Ltd., Odawara-shi, JP;
Abstract
A magnetic disk apparatus includes a plurality of magnetic disks driven to rotate by a spindle motor, arms supporting magnetic heads on the magnetic disks, an actuator for moving the arms on the magnetic disks by a voice coil motor, and a housing which surrounds the magnetic disks, the arms and the actuator. A shroud which arcuately surrounds the magnetic disks along the outer periphery thereof has an opened portion for inserting the arms is formed in a part of the housing. The shroud on an upstream side of the arms relative to airflow generated by the magnetic disks when rotating is provided with an opening having a greater width than that of a gap defined between the shroud and the outer periphery of the magnetic disks. An empty bypass channel is provided which communicates from the opening through a rear side of the voice coil motor to the downstream side of the arms.