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:
Jun. 11, 2019
Filed:
Jan. 16, 2018
Ntn Corporation, Osaka-shi, JP;
Yuta Nakatsuji, Iwata, JP;
NTN Corporation, Osaka-shi, JP;
Abstract
The wheel bearing apparatus has hub bolts () to fasten a wheel secured equidistantly around the wheel mounting flange (). An annular groove () is formed on the outer-side surface () of the wheel mounting flange (). The annular groove () includes a region where the hub bolts () are mounted. The outer-side surface () of the wheel mounting flange () is formed as a cut surface cut after press-fitting of the hub bolts (). Weight reduction apertures (circular apertures) () are formed between the hub boltsof the wheel mounting flange (). A diameter of a circumscribed circle ϕA circumscribing the circular apertures () is set larger than an outer diameter ϕB of the annular groove (). Accordingly, muddy water is easily discharged from the circular apertures ().