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:
Mar. 20, 2007
Filed:
Mar. 11, 2004
Ryoji Yoneyama, Chiba, JP;
Shinji Kinoshita, Chiba, JP;
Toru Kumagai, Chiba, JP;
Hiromitsu Gotoh, Chiba, JP;
Atsushi Ohta, Chiba, JP;
Ryoji Yoneyama, Chiba, JP;
Shinji Kinoshita, Chiba, JP;
Toru Kumagai, Chiba, JP;
Hiromitsu Gotoh, Chiba, JP;
Atsushi Ohta, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
The opening of an oil containerfor storing oilis sealed airtight with a cover member. A one-sided-bag-shaped fluid dynamic pressure bearingis seated on an O-ringand fixed airtight onto the upper surface of a bearing seating. Inanexhaust position with the distal end portion of an injection tubepositioned away from an oil level, the inside of the oil containeris evacuated by a vacuum pumpthrough a suction/exhaust passage including a suction/exhaust through-hole, thus turning the inside of the one-sided-bag-shaped fluid dynamic pressure bearing () into a vacuum. In this state, a control device drives a moving device to raise the oil containerto an injection position and releases the suction/exhaust passage to the atmosphere. This causes the oilto be injected into the one-sided-bag-shaped fluid dynamic pressure bearingthrough an oil injection passage including the injection tube