Pneumatic system for the automatic operation of semi-trailer lan

Details Pneumatic system for the automatic operation of semi-trailer lan Pneumatic system for the automatic operation of semi-trailer lan

1992-10-09

1994-04-05

Johnson, Brian L.

Land vehicles

Wheeled

Attachment

280475, 254419, B60S 910

Patent

active

052998290

ABSTRACT:
A pneumatic system for automatically extending or retracting a semi-trailer's landing gear to support, raise or lower the trailer, such system utilizing a pneumatic gear motor attached to the gear reduction box assembly's inboard shaft through a coupling, allowing axial movement of the inboard shaft, such pneumatic gear motor interconnected to dual air lines selectively activated by a landing gear control valve receiving air from a valve disposed on the semi-trailer's air brake line.

REFERENCES:
patent: 3341179 (1967-09-01), Smith
patent: 3503588 (1970-03-01), Bach
patent: 3874696 (1975-04-01), Gardner et al.
patent: 4097840 (1978-06-01), Chappelle
patent: 4116315 (1978-09-01), Vandenberg
patent: 4281852 (1981-08-01), Konkle
patent: 4345779 (1982-08-01), Busby
patent: 4400986 (1983-08-01), Swanson et al.
patent: 4402526 (1983-09-01), Huetsch
patent: 4466637 (1984-08-01), Nelson
patent: 5004267 (1991-04-01), Busby

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