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:
Jul. 13, 2021
Filed:
May. 26, 2017
Kobe Steel, Ltd., Hyogo, JP;
Shunsuke Morinaka, Hyogo, JP;
KOBE STEEL, LTD., Hyogo, JP;
Abstract
A labyrinth seal includes a step portion formed on an outer circumferential portion of a rotary body, a fin extending radially inward from an inner circumferential portion of a stationary body, and an annular groove formed in the outer circumferential portion of the rotary body. The step portion includes a diameter-increasing step portion and a diameter-decreasing step portion. The fin includes a first fin, a second fin, and a third fin. The annular groove is disposed in at least a part of a region that is located close to the low-pressure side compared to the high-pressure-side step portion and close to the high-pressure side compared to the third fin.