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:
Aug. 05, 2025
Filed:
Dec. 03, 2021
Edwards Japan Limited, Chiba, JP;
Shigeyoshi Nakatsuji, Chiba, JP;
Yoshiyuki Sakaguchi, Chiba, JP;
Edwards Japan Limited, Chiba, JP;
Abstract
A vacuum pump includes a casing having an inlet port, and enclosing a rotating body, a thread groove stator which is substantially cylindrical and is disposed on an outer periphery of the rotating body, and a thread groove which is formed in at least one of an outer peripheral surface of the rotating body and an inner peripheral surface of the thread groove stator, the vacuum pump exhausting gas sacked from a side of the inlet port to outside of the casing by rotating the rotating body, wherein a binding means, which is formed of a material having a linear expansion coefficient lower than a linear expansion coefficient of a material of the thread groove stator and reduces radial deformation at a time of thermal expansion of the thread groove stator, is disposed on an outer periphery of the thread groove stator.