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:
Oct. 25, 2022
Filed:
Aug. 02, 2019
Edwards Japan Limited, Chiba, JP;
Edwards Japan Limited, Chiba, JP;
Abstract
Provided is a vacuum pump including a turbomolecular mechanism having rotor blades and stator blades alternately arranged in multiple stages in an axial direction inside a casing having an inlet port that sucks gas from an outside and an outlet port that exhausts the sucked gas to the outside, the vacuum pump including: a plurality of annular spacers that are stacked on each other and position the stator blades in the axial direction; the casing that has a cylindrical portion arranged to surround outer peripheries of the plurality of stacked spacers and a base portion attached to a lower portion of the cylindrical portion; and an upper radial positioning portion and a lower radial positioning portion provided at two vertical positions inside the cylindrical portion and coaxially hold at least a spacer of an uppermost stage and a spacer of a lowermost stage among the plurality of stacked spacers.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile