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:
Jun. 13, 2006
Filed:
Jul. 25, 2002
Tsuyoshi Nakamura, Kanagawa, JP;
Nobuhito Saji, Kanagawa, JP;
Tsuyoshi Nakamura, Kanagawa, JP;
Nobuhito Saji, Kanagawa, JP;
NSK Ltd., Tokyo, JP;
Abstract
In the present positioning apparatus, a positioning apparatus, comprising: a box body including a process chamber exposed to a decompression environment in the interior of the box body and an opening allowing said process chamber to communicate with an outside; a moving member for shielding said opening of said box body with a slight clearance between said box body and the moving member and movable with respect to said opening of said box body; and a differential pumping seal for sealing said slight clearance between said opening of said box body and said moving member, wherein a portion of said moving member to be moved into the interior of said process chamber, when said moving member moves, is formed as an adsorption preventive area.