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. 17, 2015
Filed:
Mar. 30, 2011
Kenichi Hisamatsu, Hirakata, JP;
Kenichi Hisamatsu, Hirakata, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A roller unit is provided which includes: (i) a roller configured to roll in contact with a crawler belt; (ii) a roller shaft for rotatably supporting the roller; (iii) a seal fit in an annular space defined between the roller and the roller shaft, wherein the seal is formed such that an inner circumference side sealing portion located on an inner circumference side and an outer circumference side sealing portion located on an outer circumference side and press-fit in the roller are fit together so as to come into slidable contact with each other; and (iv) a collar mounted to the roller shaft, wherein the collar has a boss portion onto which the inner circumference side sealing portion is pressed and a flange portion disposed on an atmosphere side of the inner circumference side sealing portion. A gap is formed between an end face of the outer circumference side sealing portion and the flange portion and the flange portion is provided with a circumferentially extending groove formed on a side opposed to the outer circumference side sealing portion. The outer circumference side sealing portion is disposed so as to enclose the inner circumference side sealing portion, and the flange portion is brought into contact with an end face of the inner circumference side sealing portion located on the atmosphere side of the inner circumference side sealing portion.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile