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. 19, 2007
Filed:
May. 23, 2002
Applicant:
Choshoku Sai, Kanagawa, JP;
Inventor:
Choshoku Sai, Kanagawa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 32/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A hydrostatic bearing apparatus has a hydrostatic bearing pad, a labyrinth seal part having an exhaust groove provided around the outside of the hydrostatic bearing pad, an adjustment mechanism for adjusting a labyrinth seal part gap, non-contacting displacement gauges for sensing changes in the size of the gap, and actuators that are activated to adjust the gap so as to maintain the gap at a predetermined constant value. The exhaust groove parts and the labyrinth seal part can move relative to each other, and an annular seal forms an airtight seal to prevent air leaks and keep the bearing steady.