Elevator – industrial lift truck – or stationary lift for vehicle – Transportable elevator – Wheel supported
Patent
1992-12-15
1995-03-07
Noland, Kenneth W.
Elevator, industrial lift truck, or stationary lift for vehicle
Transportable elevator
Wheel supported
254122, 180140, 187269, B66B 1104
Patent
active
053949595
ABSTRACT:
A scissors lift apparatus has three scissor units for supporting heavy loads. A central scissor unit has its arms located inwardly of the immediately lower and upper scissor units, and folds into the upper and lower scissor units for storage within a chamber in a mobiled chassis. The scissor arms of the upper and lower scissor units includes rectangular box beams with a greater vertical than horizontal dimension. Hydraulic cylinders are located within and coupled to the opposite two arms of the center scissor unit to expand and collapse the same. The mobile chassis has front steering wheels mounted with hydraulic powered-caster-type wheel drive and steering apparatus. The steering king pin is laterally offset from the vertical plane through the center of wheel. A dual fail safe braking unit on the trailing wheels has an applied hydraulic cylinder unit including a floating cylinder with a single spring applied piston and rod which is supported in a fixed journal and connected to one wheel. An internal compression spring maintains the rod extended except when over loading by hydraulic pressure. A second rod is secured to the cylinder and is releasably coupled to the second wheel.
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Cullity Richard E.
Engvall David P.
Noland Kenneth W.
Simon Aerials Inc.
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