专利名称：CYLINDER ALIGNMENT MONITORING
SYSTEM FOR A MAST OR DERRICK
发明人：Steve Robb申请号：US14872763申请日：20151001
公开号：US20170096832A1公开日：20170406
专利附图：
摘要：A cylinder alignment monitoring system for a mast or derrick hingedly
connected to a substructure wherein at least a pair of extending cylinders move the mastor derrick between a storage position and an upright use position. The monitoring
system includes a distance measurement device to determine the extension distance ofeach of the extending cylinders. A comparison device compares the extension distancesmeasured for each of the extending cylinders.
申请人：Woolslayer Companies, Inc.
地址：Tulsa OK US
国籍：US
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