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
2006-03-02
2009-08-18
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
C254S358000, C254S342000, C254S347000, C254S350000
Reexamination Certificate
active
07575223
ABSTRACT:
An overload preventing apparatus of a hoist characterized in including a drive shaft2for driving a load sheave1, a pressure receiving member4outwardly fitted to the drive shaft2, a drive member10for transmitting a drive force from operating means14to the drive shaft2by way of the pressure receiving member4, a rotation drive member12including means of transmitting the drive force from the operating means14to the drive member10and releasing an engagement with the drive portion10when the operating means14is applied with a torque equal to or larger than a predetermined torque value and an elastic member13mounted along an axial direction of the drive member between a back face of the rotation drive member12and an inner side end face of the operating means14to pose a problem that a belleville spring is obliged to be used as urging means, and therefore, a stroke in the axial direction of the urging means is small, also a height of an engaging claw becomes small in accordance with the stroke of the belleville spring and a variation in a load relative to a height of the claw becomes large.
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International Search Report for PCT/JP2006/303981 mailed Jun. 20, 2006.
Koyama Koji
Xia Desheng
Kito Corporation
Marcelo Emmanuel M
Wenderoth , Lind & Ponack, L.L.P.
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