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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 12680545 B1

PDFFull Text
Date of Patent:
Jul. 14, 2026

Filed:

Jul. 02, 2025

Screw compressor

Applicant:

Hitachi, Ltd., Tokyo, JP;

Inventors:

Hironobu Kawamura, Tokyo, JP;

Sachio Sekiya, Tokyo, JP;

Hiroshi Maita, Tokyo, JP;

Haruki Nukaga, Tokyo, JP;

Kento Hashimoto, Tokyo, JP;

Assignee:

Hitachi, Ltd., Tokyo, JP;

Attorney:

Crowell & Moring LLP

Primary Examiner:

Shafiq Mian

Int. Cl.
CPC ...
F04C 28/00 (2006.01); F04C 15/00 (2006.01); F04C 18/06 (2006.01); F04C 29/00 (2006.01);
U.S. Cl.
CPC ...
F04C 28/00 (2013.01); F04C 15/0096 (2013.01); F04C 18/06 (2013.01); F04C 29/0092 (2013.01); F04C 2270/185 (2013.01); F04C 2270/195 (2013.01);
Abstract

A screw compressor includes a first seal, a second seal, and a third seal which are non-contact seals from a rotor side to a bearing side of a shaft seal portion, a compressed gas supply device which is different from a rotor that supplies compressed gas between the first seal and the second seal, and a heating device that heats the compressed gas supplied between the first seal and the second seal from the compressed gas supply device.

Find Patent Forward Citations

Kawamura, Hironobu. (2026). Screw compressor (U.S. Patent No. 12680545). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12680545

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

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