Excavating – Cable-operated – Boom-type
Reexamination Certificate
2007-11-13
2007-11-13
Beach, Thomas A (Department: 3671)
Excavating
Cable-operated
Boom-type
C037S395000, C212S180000, C180S311000, C280S797000
Reexamination Certificate
active
10789160
ABSTRACT:
In a crawler frame in which legs in a center frame are formed from cast steel, a simple structure is achieved by reducing the number of components. To this end, the crawler frame, which has a center frame composed of a central frame section for supporting a swing bearing and legs located on the right and left sides of the central frame section; and track frames disposed on the sides of the distal ends of the legs, respectively, of the center frame, is designed such that each of the legs is bifurcated into front and rear leg sections and the front and rear leg sections are respectively formed from cast steel.
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Fukushima Akira
Nishimura Takaharu
Ohta Akio
Urase Kohei
Beach Thomas A
Frishauf Holtz Goodman & Chick P.C.
Hitachi Construction Machinery Co. Ltd.
Komatsu Ltd.
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