Fluid-operated apparatus for handling and lifting loads

Details Fluid-operated apparatus for handling and lifting loads Fluid-operated apparatus for handling and lifting loads

B - Operations, Transporting

66

D

254/82

B66D 1/08 (2006.01)

Patent

CA 1224772

FLUID OPERATED APPARATUS FOR HANDLING AND LIFTING LOADS ABSTRACT Fluid-operated apparatus is provided for hand- ling and lifting loads of various weights. The apparatus includes a fluid-operated hoist with an elongate member extending therefrom to a load-carrying unit. A pilot fluid-controlled regulator supplies fluid to the hoist and a load-responsive, pilot fluid regulator is carried by the load-carrying unit and supplies pilot fluid to the pilot fluid-controlled regulator. The pilot fluid is varied according to the weight of a load so that the pressure of the fluid supplied to the hoist is according- ly varied by the pilot fluid-controlled regulator to automatically balance the load carried by the load-carry- ing unit. The load can also be lifted by bypassing the pilot fluid-controlled regulator and controlling flow of fluid to the hoist by a manually-adjustable flow control valve. The apparatus also can include a brake for prevent- ing the elongate member from moving up or down while loads are being changed or are at rest.

449522

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