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:
Jan. 05, 2016
Filed:
Apr. 30, 2014
Applicant:
Fanuc Corporation, Yamanashi, JP;
Inventor:
Tomoya Itou, Yamanashi, JP;
Assignee:
FANUC CORPORATION, Yamanashi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23Q 16/00 (2006.01); B08B 5/00 (2006.01); B23Q 3/18 (2006.01); B23Q 1/52 (2006.01); B23Q 11/08 (2006.01);
U.S. Cl.
CPC ...
B23Q 3/18 (2013.01); B23Q 1/522 (2013.01); B23Q 11/0883 (2013.01); B23Q 2220/004 (2013.01); Y10T 74/1488 (2015.01);
Abstract
The inside of a case of a rotary table device is divided into a first space and a second space. The pressure of the first space is regulated to a pressure higher than the pressure of the second space during a steady state. The relationship between the pressures is reversed at a certain timing, to make the pressure of the second space higher than the pressure of the first space. Such operation can forcibly close a check valve disposed between the first space and the second space on regular basis, thereby preventing a malfunction of the check valve.