Fire escape – ladder – or scaffold – Means maintaining platform level on angularly movable support – Swingable support
Patent
1987-09-25
1988-07-19
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Means maintaining platform level on angularly movable support
Swingable support
212261, 212266, B66F 1104
Patent
active
047578750
ABSTRACT:
A vehicular low profile self propelled aerial work platform assembly having a turntable positioned in a horizontal plane in close proximity to the axles of the vehicle. A parallelogram linkage is provided between a superstructure support frame carried by the turntable and a riser frame assembly to which one end of a telescopic boom assembly is pivotally connected, the aerial work platform being mounted on the outermost end of the telescopic boom assembly. A counterweight is detachably connected to the support frame and is formed with a trough aligned with a similar trough provided in the support frame, the parallelogram linkage includes a pair of tubular arms which extend through the troughs when the work platform is in the lowermost position. When in the lowermost position, the height of the pivotal connection of the telescopic boom assembly to the riser frame assembly is approximately eight feet allowing the assembly to be employed in warehouses and manufacturing plants having low and narrow doorways and aisles. The support frame and parallelogram linkage are symmetrical with respect to the centerline of the machine to thereby distribute stresses equally through the machine. When in the elevated position, the superstructure support frame, parallelogram linkage, and counterweight are positioned within the wheelbase of the vehicle to thereby provide a zero tailswing.
REFERENCES:
patent: 2996141 (1961-08-01), Eitel
patent: 3103345 (1963-09-01), Eitel
patent: 3448827 (1969-06-01), Clark
patent: 3856108 (1974-12-01), Grove
patent: 3861498 (1975-01-01), Grove
patent: 4000787 (1977-01-01), Groenig
patent: 4160492 (1979-07-01), Johnston
patent: 4226300 (1980-10-01), Rallis
patent: 4273214 (1981-06-01), Grove
Backer Robert D.
Hade, Jr. Donald C.
Kidde, Inc.
Machado Reinaldo P.
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