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. 29, 2014
Filed:
Mar. 24, 2011
Yasuhiko Shimizu, Kuwana, JP;
Yasuhiro Shimizu, Kuwana, JP;
Fumihiro Murakami, Kuwana, JP;
Masahiko Kataoka, Kuwana, JP;
Masanori Ueno, Kuwana, JP;
Yasuhiko Shimizu, Kuwana, JP;
Yasuhiro Shimizu, Kuwana, JP;
Fumihiro Murakami, Kuwana, JP;
Masahiko Kataoka, Kuwana, JP;
Masanori Ueno, Kuwana, JP;
NTN Corporation, Osaka, JP;
Abstract
An axle bearing device includes an inner ring fixed to an axle of a railway vehicle, an outer ring fixed to a journal box of the railway vehicle, and double row tapered rollers arranged between raceway surfaces of the inner ring and raceway surfaces of the outer ring. An opening portion between the inner ring and the outer ring is sealed by a labyrinth seal including at least one axial labyrinth extending in an axial direction and at least one radial labyrinth extending in a radial direction. At least one of the at least one axial labyrinth and the at least one radial labyrinth which form the labyrinth seal is formed between an outer-ring-side sealing member mounted to the outer ring and the inner ring or between the outer-ring-side sealing member mounted to the outer ring and an inner-ring-side sealing member mounted to the inner ring.