U.S. PAT. NO. 5,636,888
The Drafto "RF AUTOLATCH" is a radio frequency operated motorized gravity latch to be installed on overhead crane Hook Blocks, Rotating Hook Blocks, and Weighblocks. The "RF AUTOLATCH" Can be retrofitted to existing units. The gravity latch opens by "RF" remote control initiated by the operator.
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Drive Unit Assembly Showing:
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Copyright © 1999 2000 2001
Drafto Corporation
http://www.drafto.com
revised 02-08-01