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. 23, 2021
Filed:
Jul. 19, 2017
Applicant:
Eagle Industry Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 15/34 (2006.01); F01C 19/10 (2006.01); F01C 19/12 (2006.01); F01C 19/08 (2006.01); F02B 55/02 (2006.01); F02B 53/00 (2006.01);
U.S. Cl.
CPC ...
F01C 19/12 (2013.01); F01C 19/08 (2013.01); F02B 53/00 (2013.01); F02B 55/02 (2013.01); F16J 15/34 (2013.01); F16J 15/3412 (2013.01); Y02T 10/12 (2013.01);
Abstract
An oil seal member is provided at an outside surface of a member performing whirling motion such as a rotary engine rotor. A sliding face of the oil seal member that slides relatively to a stationary-side member is provided with a step extending circumferentially, and has a relatively high surface formed on one radial side with respect to the step and a relatively low surface on the other radial side. The high surface is provided with pumping grooves to pump oil tending to leak from the high surface side into the low surface side, into the high surface side by sliding relatively to the stationary-side member.