B - Operations – Transporting – 66 – F
Patent
B - Operations, Transporting
66
F
214/109
B66F 9/065 (2006.01)
Patent
CA 1146503
STRADDLE CRANE APPARATUS ABSTRACT OF THE DISCLOSURE A straddle crane including four vertical column members two side beam or torsion members, and at least one header beam member, and having wheel or caster assemblies supporting each vertical column member. The straddle crane is implemented for two-wheel or four-wheel steering and for two-wheel or four-wheel driving with open or closed ends. The structures of the header beam and the side beam members are appropriately selected, and the attachment means therefor to the vertical column members are chosen to accommodate the various forces and stresses occurring on the structure during normal operation over uneven terrain or surfaces. The header beam member is sufficiently flexible to permit movement of the casters over and in contact with uneven terrain without producing unaccept- able shear stresses in the header beam member. The torsion beam member defines a closed geometric figure in cross section to provide torsional and bending resistance to the loads applied to the vertical columns.
404060
Gowling Lafleur Henderson Llp
R. P. C. Corporation
LandOfFree
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