US PATENT SUBCLASS 191 / 90
.~.~ Fluid pressure-retracted

Current as of: June, 1999
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191 /   HD   ELECTRICITY: TRANSMISSION TO VEHICLES

45 R  DF  COLLECTORS {8}
85  DF  .~ Trolley retrievers {4}
90.~.~ Fluid pressure-retracted

DEFINITION

Classification: 191/90

(under subclass 85) Trolley retrievers wherein there is a fluid pressure motor which overcomes the erecting motor and retracts the trolley when it leaves the conductor. The erecting motor may be of any type--spring, weight, fluid, etc.