Hydraulic platform lift for a truck tailgate

Details Hydraulic platform lift for a truck tailgate Hydraulic platform lift for a truck tailgate

1997-01-27

1998-08-11

Bucci, David A.

Material or article handling

Self-loading or unloading vehicles

Loading or unloading by other carrier or mover means, and...

91171, 187242, 187274, 254 89H, B60P 144

Patent

active

057918600

ABSTRACT:
A hydraulic platform lift for trucks, having hydraulic and electrical circuitry to provide automated, or automated with manual override, platform levelling capability in the event the truck is tilted. Three embodiments are claimed where levelling may be accomplished in three separate ways; a first embodiment where levelling is accomplished by stopping one side of the platform and allowing the other side to "catch up", a second embodiment where levelling is accomplished by reversing the direction of movement of one side relative to the other to allow rapid levelling, and a third embodiment where the rate of movement of one side is slowed relative to the other, to allow the other side to "catch up" and thereby level the platform.

REFERENCES:
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patent: 3349669 (1967-10-01), Richardson
patent: 3605561 (1971-09-01), Lado
patent: 4405279 (1983-09-01), Davy et al.
patent: 4679489 (1987-07-01), Jasinski et al.
patent: 5065844 (1991-11-01), Hor
patent: 5110251 (1992-05-01), Gray
PQ Controls Inc. 2-page brochure for "Automatic Platform Leveler Model 410"--Nov. 1994 (Copy enclosed).

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