Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1985-08-14
1987-12-15
Rolla, Joseph J.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
182141, 108145, B66B 1104
Patent
active
047126531
ABSTRACT:
An energy-recycling scissors lift includes a platform, base and a pair of scissors linkages, each having a first and second scissors legs. One end of each second scissors leg is pivotally attached to the base and the other end translations along the platform. One end of each first scissors leg is pivotally attached to the platform and the other end translates along the base. A bridge structure connects each of the second scissors legs together. A sealed gas cylinder, attached to the base and the bridge structure, moves the platform to an extended position above the base. Energy is stored in the sealed gas cylinder as the platform and supported object descends to a retracted position. A compensating device is attached to the scissors lift to compensate for the overforce caused by the sealed gas cylinder. One form of the compensating device adjusts the position of the sealed gas cylinder to vary the force exerted on the platform. Other compensating devices are equalizing springs and spring reels. The scissors lift includes a device for adjusting the maximum height of the platform and a shipping boss that permits the scissors lift to be compacted for shipping.
REFERENCES:
patent: 1630191 (1927-05-01), Liberman
patent: 2531140 (1950-11-01), Linde
patent: 3228659 (1966-11-01), Sturm
patent: 4088203 (1978-05-01), Smith, Jr.
patent: 4157743 (1979-06-01), Masada et al.
Evans Archibald D.
Franklin Duane R.
Hansen Walter J.
Lift-R Technologies, Inc.
Noland Kenneth
Rolla Joseph J.
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