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
2005-02-01
2005-02-01
Marcelo, Emmanuel (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
C254S342000
Reexamination Certificate
active
06848675
ABSTRACT:
The invention provides a hoist drive system for controlling the position of a hoist platform in a palletizer. In an embodiment of the invention, a hoist drive system comprises two electrical motors with dual output shafts. One motor may have an encoder for taking measurements relating to the rotation of the motor. A common shaft with a spring set safety brake ties the motors together. The two motors may be flux vector motors controlled with input from the encoder. The motors drive two gearboxes, thereby enabling vertical displacement of a hoist platform coupled to the drive system.
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Davis O'Neal Wright
Davis Terry O'Neal
Hunton & Williams LLP
Marcelo Emmanuel
Production Automation Inc.
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