Trolley pole raising and lowering apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 6, 1987
Grant Date -
N/A
app pub date -
Oct 30, 1985
filing date -
Oct 30, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A trolley pole is supported on a vertical shaft so as to be rotatable from side to side while in its elevated, operating position. The shaft is supported on a support structure which is tiltably mounted on a base plate on a vehicle. The base plate can be tilted by extending the arm of a linear actuator. When the base plate is tilted, the pole is lowered and centered and a gravity operated latch structure comes into effect to maintain the pole centered whenever it is not in its operating position. A control circuit coupled to the actuator extends and retracts the actuator arm to pivot the support structure between an upright and a stowed position.
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Family
International Classification(s)
Cited Art Landscape
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