Spring loaded retractable wheel trailer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 23, 1993
Grant Date -
N/A
app pub date -
Oct 21, 1991
filing date -
Oct 21, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rectractable trailer having a spring loaded hydraulic piston is provided. The trailer has a bell crank connection for the axles to enable the trailer to be moved between a lowered loading position to an elevated traveling position. The hydraulic piston powers an operating train for raising and lowering the axles. In the operating train the hydraulic piston is pivotally connected to a forward end of a cradle or carriage slidable longitudinally upon a rail-like frame. A rear portion of the cradle is pivotally connected to a telescopic spring loaded operating rod which is pivotally connected at a rear end to an arm of the bell crank axle which is raised and lowered by the hydraulic piston and the operating train. The bell crank axle is comprised of an axle journalled to the trailer bed with the operating arm keyed to the axle at an angle to a wheel supporting arm in such a manner that reciprocation of the piston and the operating train causes angular movement of the bell crank axle to effect the raising and lowering. The operating rod and train effect a linear movement to minimize stress and provide a cushioned support of the bed in raising and lowering and road travel. The operation of the piston may be effected by a remote transmitter from the cab of the vehicle and by a switch on the trailer.
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