Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum
Reexamination Certificate
2006-08-29
2006-08-29
Marcelo, Emmanuel M (Department: 3654)
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
Device includes rotatably driven, cable contacting drum
Reexamination Certificate
active
07097156
ABSTRACT:
A safety device of an air balancing hoist according to the present invention is provided to instantaneously brake a reel drum in the manner that a braking pawl mounted to be rotatable on an end cap is pushed to the outside direction of the circumference of a circle by centrifugal force to be locked into a ratchet wheel fixed on the end cap when the reel drum is suddenly fast rotated during a hoisting process. The safety device of the air balancing hoist comprises a housing including a chamber in which compressed air is induced/discharged; a piston connected into the inside of the housing to be slidably reciprocated; a ball screw penetrating the piston and including both ends fixed not to be rotated in the housing; a reel drum rotated along the ball screw upon movement; a ratchet wheel in a ring shape mounted on an inner side surface of an end cap formed at one end of the housing; a braking rotor mounted in the center of the end cap to be rotatable; a braking shaft, wherein one end is fixed on the rotor and the other end is connected with a fixing hole of the reel drum; and a braking pawl, wherein one end is elastically inserted in the braking rotor to be pivotable in the circumferential direction and the other end is fixed by a hinge on the braking rotor.
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patent: 6695292 (2004-02-01), Nam
patent: 2003/0047726 (2003-03-01), Nam
Korea Hoist Co. Ltd.
Ladas and Parry LLP
Marcelo Emmanuel M
LandOfFree
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