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:
May. 24, 2005
Filed:
Apr. 09, 2003
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, Ltd., Tokyo, JP;
Abstract
A magnetic disk apparatus includes magnetic disks stacked on a rotating shaft, arms supporting magnetic heads, a rotary actuator for moving the arms, and 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 define a gap between the shroud and the portion of the side surfaces of the magnetic disks. The arcuate-shaped shroud has portions delimiting an open space adjacent to another portion of the side surfaces of the magnetic disks which is located on a downstream side of the arms relative to an air flow which moves on surfaces of the magnetic disks. A bypass channel provides air flow to the disks in a region of the open space at a reduced pressure on the downstream side of the arms with respect to pressure at an upstream side of the arms.