Tractor-trailer landing gear mechanism and method of using same
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United States of America Patent
Stats
-
Sep 5, 1989
Grant Date -
N/A
app pub date -
Aug 28, 1987
filing date -
Aug 28, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tractor-trailer landing gear mechanism for helping support a trailer end, includes a pair of elongated extendable and retractable telescoping legs. A reversible electrical motor interconnects the legs, for causing them to be retracted or extended to a desired predetermined latching position. The upright tubular member includes a plurality of outwardly extending bores, for receiving a plurality of corresponding latching pins. A plurality of similar normally deactivated solenoids are disposed on the outer sleeve to drive a safety pin into latching engagement with a corresponding bore, when the leg is extended to a desired length. A plurality of normally deactivated detectors are mounted on corresponding solenoids, for sensing the presence of a predetermined latching position. A control board includes a plurality of manually activated switches, for causing the motor to rotate in predetermined directions, and for causing the landing gear mechanism to either retract or extend.
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