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:
Apr. 22, 2014
Filed:
Jul. 25, 2011
Yoshiyuki Hirono, Kanagawa, JP;
Kouki Uefune, Kanagawa, JP;
Takashi Kouno, Ibaraki, JP;
Takako Hayakawa, Kanagawa, JP;
Yoshiyuki Hirono, Kanagawa, JP;
Kouki Uefune, Kanagawa, JP;
Takashi Kouno, Ibaraki, JP;
Takako Hayakawa, Kanagawa, JP;
HGST Netherlands B.V., Amsterdam, NL;
Abstract
Embodiments of the present invention help to prevent leakage of low-density gas during low-density gas injection into a disk drive device and to perform low-density gas injection efficiently. In a hard disk drive (HDD) according to one embodiment of the present invention, an injection hole filter with a valve function is attached to a helium injection hole in order to inject helium gas in an enclosure. The injection hole filter has a valve member configured to operate in an open state or closed state. The open state is a state while the helium gas is being injected and the closed state is a state after the helium gas has been finished to be injected. The valve member is in the open state if the outside pressure is higher than the inside pressure and is in the closed state if the inside pressure is higher than the outside pressure.