Land vehicles – Wheeled – Articulated vehicle
Patent
1987-08-28
1989-09-05
Hill, Mitchell J.
Land vehicles
Wheeled
Articulated vehicle
212189, 254419, 2807631, 2807661, 280 612, B66F 306
Patent
active
048631841
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.
REFERENCES:
patent: 3402915 (1968-09-01), Dalton
patent: 3523698 (1970-08-01), Bishop
patent: 3702181 (1972-11-01), Keller, Jr. et al.
Hill Mitchell J.
Kleinke Bernard L.
Potts Jerry R.
Waters William P.
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