Motor vehicles – Special wheel base – Five or more wheels
Patent
1978-03-20
1980-04-29
Peters, Jr., Joseph F.
Motor vehicles
Special wheel base
Five or more wheels
180234, 180 791, 180140, B62D 504
Patent
active
042001625
ABSTRACT:
The bridge portion of a traveling gantry for a rotary crane has four carrier arms hingedly secured to the four corners of a platform for free pivoting movement in a plane adjacent and parallel to the normally horizontal platform surface which carries the crane. An upright member extends downward from the free end of each carrier arm in the normal traveling condition of the gantry, and its lower end carries at least one road wheel for rotation about a horizontally extending axis. Steering devices permit the several wheels to be turned about respective axes parallel to the pivot axes of the carrier arms. The bottom faces of the wheels jointly define a plane tangential to each wheel whose spacing from the platform is greater than all horizontal dimensions of the platform and adjacent upright members, in certain positions of the associated carrier arms define the horizontal width of a portal which is at least equal to the portal height between the tangential plane and the platform.
REFERENCES:
patent: 3280931 (1966-10-01), Cahill et al.
patent: 3387684 (1968-06-01), Belke et al.
patent: 3404746 (1968-10-01), Slay
patent: 3572458 (1971-03-01), Tax
patent: 3664448 (1972-05-01), Hudis
patent: 3792745 (1974-02-01), Files
McGiehan Donn
Peters Jr. Joseph F.
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