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. 11, 2008
Filed:
Jun. 07, 2005
Hironao Ishikawa, Tsukuba, JP;
Shingo Kishimoto, Kouka, JP;
Hironao Ishikawa, Tsukuba, JP;
Shingo Kishimoto, Kouka, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
An upper boom is constituted by a box member having a shape like a box that includes an upper flange, a lower flange, a left web and a right web, and bosses that are welded to both ends of the box member. Bent plate portions which are bent inward are provided at both ends of the left web, and bent plate portions are also provided at both ends of the right web. Reinforcement plates are positioned at an outside of the bent plate portions and welded between the left web and the boss, and reinforcement plates are also welded between the right web and the boss at an outside of the bent plate portions. With these bent plate portions and the reinforcement plates, a double structure can be provided in the vicinities of the bosses, and these portions can be reinforced.