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. 06, 2026
Filed:
Jan. 11, 2022
Edwards Japan Limited, Yachiyo, JP;
Tooru Miwata, Yachiyo, JP;
Edwards Japan Limited, Yachiyo, JP;
Abstract
A vacuum pump which prevents dust generation from a shaft by avoiding contact between a top portion of the shaft and corrosive gas and includes a balance correction function for a rotating body. A vacuum pump includes a rotating body including a rotating shaft and a rotor blade which has a through hole, through which a top portion of the rotating shaft is caused to pass, and is fixed with the top portion, and a cover portion fixed to the rotating to cover the top portion and the through hole. The cover portion includes a balance correction function for the rotating body and corrosion resistance to exhaust gas. The cover portion, prevents contact between the top portion and corrosive gas and prevents dust generation from the shaft.