Climbing safety device for tower crane

Details Climbing safety device for tower crane Climbing safety device for tower crane

2005-02-15

2005-02-15

Chin-Shue, Alvin (Department: 3634)

Fire escape, ladder, or scaffold

Torso harness

Ladder-associated

C182S075000, C182S231000, C182S196000

Reexamination Certificate

active

06854562

ABSTRACT:
Disclosed is a climbing safety device in a tower crane including a vertical ladder enabling an operator to move to an overhead operator cab, and a wire rope for ensuring a safety of the operator. The climbing safety device includes a wire rope winding unit for winding or unwinding a wire rope. The wire rope has a ladder structure while being provided, at each side thereof, with engagement balls vertically spaced apart from one another. The climbing safety device also includes a safety unit for guiding a movement of the wire rope while controlling a sudden unwinding of the wire rope. The safety unit includes a sensor for sensing the sudden unwinding of the wire rope. This climbing safety device can provide a sense of security to the operator climbing up or down the tower crane by a wire rope being automatically wound and unwound, while immediately stopping the unwinding of the wire rope when the operator falls off a ladder of the tower crane, by operating the safety unit, thereby being capable of protecting the operator's life.

REFERENCES:
patent: 458023 (1891-08-01), Kimball et al.
patent: 1994408 (1935-03-01), St. Pierre
patent: 4252214 (1981-02-01), Miller
patent: 4550804 (1985-11-01), Bummer
patent: 4997064 (1991-03-01), Motte et al.
patent: 5161639 (1992-11-01), Ice

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