Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1998-03-25
1999-11-30
Underwood, Donald W.
Material or article handling
Vertically swinging load support
Shovel or fork type
414697, B66C 2300
Patent
active
059931396
ABSTRACT:
The box boom lift arm assembly of the present invention includes a single plate steel top wall and a bottom wall connected with a substantially non-transverse weld to a pair of single plate steel inner side walls and a pair of single plate steel outer side walls to define a closed box section having a rectangular cross section along the entire length, varying only in height and width. The unique configuration and shape of the plates and the use of non-transverse weld during manufacturing improve the fatigue characteristics, load distribution and strength of the box boom lift arm assembly without increasing the weight of the machine.
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Patent Abstracts of Japan; Publication No. 58062226 dated Apr. 13, 1983 Application Date Oct. 5, 1981; Application No. 56159034.
Deneve Jeffrey A.
Loughrin Owen S.
McMillan Charles T.
Caterpillar Inc.
Charlton Diana L.
Underwood Donald W.
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