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:
May. 07, 2024
Filed:
Jul. 10, 2020
Applicant:
Edwards Japan Limited, Chiba, JP;
Inventor:
Shunsuke Takeda, Chiba, JP;
Assignee:
Edwards Japan Limited, Chiba, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 19/04 (2006.01); F04D 29/38 (2006.01); F04D 29/64 (2006.01);
U.S. Cl.
CPC ...
F04D 19/042 (2013.01); F04D 29/388 (2013.01); F04D 19/048 (2013.01); F04D 29/644 (2013.01); F05D 2210/12 (2013.01);
Abstract
A vacuum pump includes: a casing formed with an inlet port or outlet port; a stator disposed inside the casing; and a rotor enclosed in the casing and including a shaft rotatably supported on the stator, and a rotor blade formed in a cylindrical shape with a plurality of blades arranged in multiple stages on an outer circumferential portion thereof, and secured to the shaft such as to be integrally rotatable therewith. The rotor blade is provided with a rupture location control groove as a rupture location control means that locally reduces rigidity of the rotor blade to control a location where the rotor blade ruptures.