US PATENT SUBCLASS 191 / 87
.~.~.~ Fluid pressure erector

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}
86  DF  .~.~ Erector release {2}
87.~.~.~ Fluid pressure erector

DEFINITION

Classification: 191/87

(under subclass 86) Trolley retrievers of the erector release type wherein the erecting force of the trolley is fluid pressure, which pressure is released when the trolley leaves the conductor, thus allowing the trolley to drop.