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:
Mar. 29, 2023
Applicant:
Edwards Japan Limited, Chiba, JP;
Inventor:
Takashi Kabasawa, Chiba, JP;
Assignee:
Edwards Japan Limited, Chiba, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 29/66 (2006.01); F04D 19/04 (2006.01); F16F 1/373 (2006.01);
U.S. Cl.
CPC ...
F04D 29/662 (2013.01); F04D 19/042 (2013.01); F16F 1/373 (2013.01);
Abstract
A vacuum pump is provided in which a balance correction member can be reduced in size and is easily attachable. The vacuum pump includes a main body casing, a rotating body, and a motor. The rotating body and the motor are provided in the main body casing. A groove portion is provided in an inner circumference surface of the rotating body. A weight that is plate shaped is placed in the groove portion. The weight has elastic displacement portions and is held and fixed in the groove portion. The elastic displacement portions are formed by opening displacement permitting holes each having one open end in the weight.