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:
Jul. 23, 2024
Filed:
Mar. 09, 2020
Edwards Japan Limited, Chiba, JP;
Hideki Enosawa, Chiba, JP;
Manabu Nonaka, Chiba, JP;
Yasushi Maejima, Chiba, JP;
Tsutomu Takaada, Chiba, JP;
Edwards Japan Limited, Chiba, JP;
Abstract
A vacuum pump includes: a particle transferring portion that functions as a means for transferring a particle in an exhaust direction of the gas particle by increasing or reducing a height of an upstream end of at least a part of rotor blades among a plurality of rotor blades that constitute an uppermost exhaust stage to realize a stepped structure in which heights of the upstream ends differ as the uppermost exhaust stage as a whole, and in a rotating body constituted by the plurality of rotor blades, the particle transferring portion, and a cylindrical portion that supports the plurality of rotor blades, an imbalance created with respect to the rotating body as a whole by a presence of a rotor blade of which a height of the upstream end has become higher than other rotor blades due to the stepped structure has been corrected.