Handling: hand and hoist-line implements – Grapple – Expanding
Patent
1983-04-22
1985-10-15
Marbert, James B.
Handling: hand and hoist-line implements
Grapple
Expanding
294 671, B66C 154
Patent
active
045470120
ABSTRACT:
A tire loader has a support defining an upright axis and at least three like abutments angularly equispaced about and radially equispaced from the axis on the support. A plate pivotal about the axis on the support within the abutments carries at least three respective inner pivots angularly equispaced about and radially equispaced from the axis on the plate. At least three respective arms each have radially inner ends pivoted on the respective pivots and outer ends. Each arm bears angularly on the respective abutment. At least three respective bead-engaging shoes are pivoted on the outer ends of the respective arms. An actuator operatively connected between the support and the plate can rotate the plate about the axis on the support and thereby pivot the arms about the inner pivots and move the shoes radially. The abutments are rollers having respective roller axes parallel to the support axes. Each of the arms is displaceable between an inner position extending generally tangentially of the axis and with its inner end closely juxtaposed with the outer end of the trailing arm and an outer position extending radially outward and forming an acute angle with a radius drawn from the axis through the respective inner pivot.
REFERENCES:
patent: 2642307 (1953-06-01), Olson
patent: 3380115 (1968-04-01), Sonderquist
patent: 3393807 (1968-07-01), Sylvester et al.
Dubno Herbert
Fried. Krupp Gesellschaft mit beschrankter Haftung
Marbert James B.
Ross Karl F.
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