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. 04, 2008
Filed:
Nov. 21, 2003
Kouhei Urase, Shiga, JP;
Hironao Ishikawa, Shiga, JP;
Saori Sawai, Kosai, JP;
Hitachi, Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A left fore leg () is formed to shape by a casting means, integrating an inner joint portion (A), an outer joint portion (B) and an intermediate tubular portion (C) into an unitary tubular structure. In this case, a joining end (A) of the inner joint portion (A) as well as an outer joining end (B) of the outer joint portion (B) is in the form of an open end of a rectangular shape. Accordingly, it becomes possible to cut the production cost of truck frame () and to form a longer welding bead around the outer periphery of the respective inner and outer joining ends (A) and (B) to enhance the joint strength between the inner joint portion (A) and a center frame () as well as the joint strength between the outer joint portion (B) and a side frame ().