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:
Aug. 03, 2021
Filed:
Sep. 19, 2018
Borgwarner Inc., Auburn Hills, MI (US);
Erwin Perry Ellwood, III, Candler, NC (US);
BorgWarner Inc., Auburn Hills, MI (US);
Abstract
A turbocharger includes a shaft, a compressor wheel, and a seal assembly. The seal assembly includes a carbon ring having a carbon surface having a carbon ring inner diameter and a carbon ring outer diameter. The seal assembly also includes a mating ring having a mating surface facing the carbon surface of the carbon ring. The mating surface has a land portion configured to contact the carbon surface between a first mating diameter radially aligned with the carbon ring inner diameter and a second mating diameter radially aligned with the carbon ring outer diameter. The land portion has a land area between the first and second mating diameters. The mating surface defines a plurality of grooved portions. The plurality of grooved portions have a grooved area between the first and second mating diameters. A ratio of the land area to the grooved area is between 1.3 and 2.9.