Front device

Details Front device Front device

2005-06-07

2008-11-11

Underwood, Donald (Department: 3652)

Material or article handling

Vertically swinging load support

Shovel or fork type

C052S111000, C414S694000

Reexamination Certificate

active

07448841

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.

REFERENCES:
patent: 4392314 (1983-07-01), Albrecht et al.
patent: 5611657 (1997-03-01), Peterson
patent: 2004/0161326 (2004-08-01), Yamaguchi et al.
patent: 53-31539 (1993-12-01), None
patent: 9-242108 (1997-09-01), None
patent: 9-242109 (1997-09-01), None
patent: 11-200397 (1999-07-01), None
patent: 2001-81810 (2001-03-01), None

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