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Class 212/93 - Cable


Subclass of Class 212 - Traversing hoists
Definition: Systems of the type comprising a carriage, a hoisting cable
No. of patents: 1
Last issue date: 12/25/1979


NumberTitleIssue Date
4179947Counterbalanced pumping system
An eccentric balancing system for assisting the reciprocal motion of a well pump which includes a first mandrel having wound thereabout a first sheave chain, the wind up of the first sheave chain being arranged for stacked alignment. A second mandrel, mou... 		12/25/1979
 
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