Motor vehicles – Bodies – Tractor and similar vehicle cabs
Reexamination Certificate
2011-03-29
2011-03-29
Ilan, Ruth (Department: 3616)
Motor vehicles
Bodies
Tractor and similar vehicle cabs
C280S781000, C296S190030, C296S190040, C296S204000
Reexamination Certificate
active
07913789
ABSTRACT:
A reinforced upper frame for supporting a cabin of heavy construction equipment using a welding deformation preventing structure and a method of manufacturing the same are disclosed, in which even if a side frame is welded to a machined center frame, there is no thermal deformation around the machined portion. The reinforced upper frame includes a center frame having a lower plate machined to accommodate a swing ring gear, a lateral plate machined to accommodate an operation device, and a welding deformation preventing structure fixed to one side of the lower plate and lateral plate prior to welding, in which a part of the cabin is mounted on the welding deformation preventing structure, and left and right frames each having a side channel disposed in a longitudinal direction of the center frame and a side frame welded to the structure for connecting the side channel and the center frame.
REFERENCES:
patent: 4061392 (1977-12-01), Lowder et al.
patent: 7-150589 (1995-06-01), None
patent: 2001-323511 (2001-11-01), None
patent: 2003-82705 (2003-03-01), None
patent: 01/32476 (2001-05-01), None
Ilan Ruth
Ladas & Parry LLP
Volvo Construction Equipment + Holding Sweden AB
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