Title: Load balance, double bucket cable stay crane with load sensing means

Abstract: A horizontal gantry centered on the vertical tower of a crane supports on each side of the tower trolleys which move in unison in opposite directions at similar speed towards and away from the tower. Bulk material buckets are suspended from respective trolleys by vertical hoist cables. Sensors sense the loads of the buckets which are then compared, and the hoist and trolley drive motors are controlled to maintain load equilibrium on the crane to permit the buckets to be raised and the trolleys moved only when substantially equal loads are carried by the buckets.

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Inventors: Ray, Louis F. (Baton Rouge, LA, US)

Application Number: 705181
Filing Date: 1976-07-14
Publication_date: 1977-08-02
Assignee:
Primary Class(es): 212/278 212/279, 414/21
Other Classes:
US Patent Ref:

654739	Jul, 1900	Lancaster	212/47.
763222	Jun, 1904	Van Driessche	212/47.
1507598	Sep, 1924	Gustafson	212/2.
2667275	Jan, 1954	Llanusa	212/2.

Other Refs:
Primary Examiner: Spar, Robert J.
Assistant Examiner: Johnson, R. B.
Attorney: Sughrue, Rothwell, Mion, Zinn and Macpeak