Pneumatic lift for trailers

Details Pneumatic lift for trailers Pneumatic lift for trailers

1990-06-06

1991-09-24

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Vehicle attached jack

Semi-trailer landing gear

B60S 906

Patent

active

050508458

ABSTRACT:
A pneumatic system for raising and lowering the landing gear of a trailer, wherein the pneumatic system includes a pneumatic motor totally supported by the landing gear. In this way, mounting of the pneumatic system is independent of trailer type or configuration. A gear shift spline assembly is provided between the speed reducer, that is coupled to the pneumatic motor, and the crank shaft that drives the landing gear's high-low gear reduction assembly. This spline assembly permits the crank shaft to axially translate and shift gear arrangements in the gear reduction assembly without separating the crank shaft from the pneumatic drive.

REFERENCES:
patent: 2977094 (1961-03-01), McKay
patent: 3064943 (1962-11-01), Shrum
patent: 3177664 (1965-04-01), Konkle
patent: 3214137 (1965-10-01), Reichert et al.
patent: 3874696 (1975-04-01), Gardner et al.
patent: 4312520 (1982-01-01), Burman
patent: 4466637 (1984-08-01), Nelson

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