Method and apparatus for an emergency lowering kit

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United States of America Patent

PATENT NO 9409752
SERIAL NO

14444717

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Importance

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Abstract

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A method and apparatus are disclosed for lowering a load on a direct current hoist motor during an electrical power interruption, the method including but not limited to determining in a crane processor that the electrical power interruption has occurred; and providing a brake assist current to shunt field on the direct current hoist motor to produce a counter torque in the hoist motor.

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Patent Owner(s)

Patent OwnerAddress
ELECTRONIC POWER DESIGN INC15200 I-45 NORTH PATENT CORRESPONDENCE HOUSTON TX 77090

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sutherland, Charles Houston, US 9 27

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