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:
Dec. 03, 2002
Filed:
Nov. 05, 1998
Nobuyuki Okunaga, Odawara, JP;
Masao Iwakura, Odawara, JP;
Kazuo Nakagoshi, Odawara, JP;
Takuji Ogawa, Odawara, JP;
Chuma Akira, Ashigarashimo-gun, JP;
Fumio Kugiya, Odawara, JP;
Tomio Suzuki, Hiratsuka, JP;
Toshiaki Kojima, Odawara, JP;
Kazuo Sakai, Niihari-gun, JP;
Naoki Kodama, Kamakura, JP;
Tatsuya Ishigaki, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A magnetic disk drive has a housing for a 3.5 inch form factor and disk media of a diameter for a 2.5 inch form factor. The smaller disk media rotate at a high speed while consuming low electric lower and generating less heat while providing for quick access speeds. Usually, when the magnetic disk media are rotated at a higher speed, the electric power consumption and heat generation are increased because of the load increase. This problem is avoided with the use of cooling fins placed about the periphery of the disk media. Further, the smaller size disk media enable a decrease in torque loss during on-load rotation with the media, and a decrease of electric current to the spindle motor during rotation.