LIFTING ARRANGEMENT
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United States of America Patent
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app pub date -
Feb 3, 2016
filing date -
Mar 12, 2015
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Abstract
A back-up load retention system includes a retention line which is connected to a load, a counterweight unit which is connected to the retention line, and a double-acting hydraulic cylinder which is connected to the counterweight unit. The counterweight unit maintains a tension force in the retention line. The double-acting hydraulic cylinder brakes and/or stops the load in a case of a failure in a main lifting system.
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