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. 14, 1987
Filed:
May. 23, 1985
Sosaku Kimura, Tokyo, JP;
Toshikazu Hatsuse, Tanashi, JP;
Masami Shimizu, Tanashi, JP;
Masakazu Miyashita, Kokubunji, JP;
Junichi Yoshioka, Chiba, JP;
Akira Kanai, Higashiyamato, JP;
Koichi Koizumi, Matsudo, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
A rotary table unit having a stationary base element and a table element rotatably mounted on the stationary base element is provided with hydrostatic and hydrodynamic bearing guides forming a composite bearing guide mechanism for enabling smooth and stable rotation of the table element under application of local load to the table element. The rotary table unit is also provided with a main drive motor for rotating the table element and an auxiliary drive motor for supplementing a drive force of the main drive motor in response to a change in load applied to the table element.