Air hoist and its control device

Details Air hoist and its control device Air hoist and its control device

B - Operations, Transporting

66

D

121/63

B66D 3/24 (2006.01) B66D 3/18 (2006.01)

Patent

CA 1040944

ABSTRACT OF THE DISCLOSURE An air hoist comprising a support member, which houses a bolt and carries a fixed nut screwing onto the bolt through balls, a piston rotatably fitted in the support member through a seal, a drum-cylinder which is slidably put on the piston with another seal therebetween and forms a pressure chamber between its head and the piston, and a passage through which pressurized fluid is introduced and discharged from the pressure chamber, whereby the drum-cylinder rotatingly advances by the action of the bolt-nut-ball assembly to take up the wire rope when the pressurized fluid is introduced into the pressure chamber, and reversingly retreats, under the influence of the self-weight of the load, to pay off the wire rope when the pressurized fluid is discharged therefrom.

253835

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