Handling: hand and hoist-line implements – Article carrier gripped and carried by hand – Convertible to – or useable as – different device or different...
Patent
1976-05-25
1977-08-30
Spar, Robert J.
Handling: hand and hoist-line implements
Article carrier gripped and carried by hand
Convertible to, or useable as, different device or different...
214 1BV, 214658, 294 655, B66C 104
Patent
active
040448940
ABSTRACT:
Apparatus for the magnetically lifting and tilting an elongate load, e.g., a steel beam, is disclosed. The apparatus comprises a plurality of electromagnets supported in a corresponding plurality of yokes in a linear array along a beam structure. On each yoke, a stepping motor is coupled to the respective electromagnet for controllably rotating the electromagnet around a pivotal axis which is parallel to the axis of the array. The motors are synchronously operated, thereby enabling an elongate load to be lifted by the electromagnets together and tilted around the pivotal axis. In a preferred construction, each end of each yoke is suspended on a plurality of tie elements connected to a vertically compliant spring suspension system mounted on the beam structure. The tie elements are arranged to minimize swinging or misalignment of the several electromagnetic lifting elements.
REFERENCES:
patent: 3924759 (1975-12-01), Madonia
Ela Roger B.
McDonald Donald C.
Whittaker Francis E.
Abraham George F.
Spar Robert J.
Walker Magnetics Group, Inc.
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