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:
Mar. 03, 2015
Filed:
Jun. 11, 2010
Applicants:
Toshikazu Harashima, Tama, JP;
Yoshiyuki Kanemoto, Samukawa, JP;
Koji Fukui, Machida, JP;
Susumu Sakamoto, Kawasaki, JP;
Inventors:
Toshikazu Harashima, Tama, JP;
Yoshiyuki Kanemoto, Samukawa, JP;
Koji Fukui, Machida, JP;
Susumu Sakamoto, Kawasaki, JP;
Assignee:
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04C 18/02 (2006.01); F01C 19/00 (2006.01); F04C 27/00 (2006.01);
U.S. Cl.
CPC ...
F04C 18/0215 (2013.01); F01C 19/005 (2013.01); F04C 18/0284 (2013.01); F04C 27/005 (2013.01);
Abstract
To provide a higher sealing capability irrespective of the pressure difference between compression chambers, lips having leading ends extended toward the inner surface of a recessed groove are formed. At least some of the lips have a base end that is shaped to reduce rigidity against extension of the lips.