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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.:

US 11078925 B1

PDFFull Text
Date of Patent:
Aug. 03, 2021

Filed:

Aug. 09, 2017

Vacuum pump and rotating cylindrical body included in vacuum pump

Applicant:

Edwards Japan Limited, Chiba, JP;

Inventors:

Yoshiyuki Sakaguchi, Chiba, JP;

Tooru Miwata, Chiba, JP;

Nahoko Yoshihara, Chiba, JP;

Assignee:

Edwards Japan Limited, Chiba, JP;

Attorneys:

Theodore M. Magee

Westman, Champlin & Koehler, P.A.

Primary Examiner:

Aaron R Eastman

Int. Cl.
CPC ...
F04D 29/52 (2006.01); F04D 19/04 (2006.01); F04D 29/32 (2006.01); F04D 3/00 (2006.01); F04D 29/40 (2006.01);
U.S. Cl.
CPC ...
F04D 29/526 (2013.01); F04D 3/00 (2013.01); F04D 19/042 (2013.01); F04D 19/044 (2013.01); F04D 29/32 (2013.01); F04D 29/403 (2013.01); F05D 2250/292 (2013.01); F05D 2250/52 (2013.01);
Abstract

A vacuum pump reduces a stress without reducing the rotation speed of a rotating cylindrical body. In an outlet port-side lower portion of a rotor cylindrical portion included in the vacuum pump, a smaller diameter portion having an outer diameter smaller than that of an inlet port-side portion of the rotor cylindrical portion is provided. A lowermost end portion (outlet port-side end portion) of the rotor cylindrical portion is designed longer than a thread groove exhaust element to provide an extending portion. In the extending portion, a smaller diameter portion having an outer diameter smaller than that of the inlet port-side portion of the rotor cylindrical portion which is opposed to the thread groove exhaust element is provided.

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Sakaguchi, Yoshiyuki. (2021). Vacuum pump and rotating cylindrical body included in vacuum pump (U.S. Patent No. 11078925). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11078925

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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