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. 16, 2020
Filed:
Mar. 12, 2018
Applicant:
Shimadzu Corporation, Kyoto, JP;
Inventor:
Koichi Shimizu, Kyoto, JP;
Assignee:
Shimadzu Corporation, Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D 29/64 (2006.01); F04D 29/52 (2006.01); F04D 29/058 (2006.01); F04D 25/06 (2006.01); F04D 29/08 (2006.01); F04D 29/60 (2006.01); F04D 29/70 (2006.01); F04D 19/04 (2006.01);
U.S. Cl.
CPC ...
F04D 29/644 (2013.01); F04D 19/042 (2013.01); F04D 25/06 (2013.01); F04D 29/058 (2013.01); F04D 29/083 (2013.01); F04D 29/522 (2013.01); F04D 29/601 (2013.01); F04D 29/701 (2013.01);
Abstract
A center ring interposed between a vacuum chamber and a vacuum pump, comprises: a ring main body including a first ring fitting portion to be fitted in a chamber-side fitting portion of the vacuum chamber and a second ring fitting portion to be fitted in a pump-side fitting portion of the vacuum pump; a foreign particle entrance prevention member provided at the ring main body; and a dropping prevention structure configured to prevent the center ring from dropping from the pump-side fitting portion of the vacuum pump.