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:
Nov. 14, 2006
Filed:
Mar. 11, 2004
Teiji Yamamoto, Hirakata, JP;
Kenji Kooriyama, Hirakata, JP;
Teiji Yamamoto, Hirakata, JP;
Kenji Kooriyama, Hirakata, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
The invention provides a shaft for a roller wheel which is excellent in strength and can achieve a weight saving. The invention provides a shaft for a roller wheel which rotatably supports a roller () outward fitted between both end portions () in a state in which both end portions () are fixed, and receives a load in a diametrical direction via the roller (). Recess portions () are provided on a side to which the load is not applied, on an outer peripheral surface corresponding to the roller (). The load applying direction is a vertical direction. A cross sectional shape of the shaft in the recess portions () is formed in a shape which is constituted by an upper circular arc portion () on an upper side, a lower circular arc portion () on a lower side, and a vertical connection portion () passing through a shaft axis (O) and connecting the upper circular arc portion () to the lower circular arc portion ().