Platform lift

Details Platform lift Platform lift

1984-11-19

1986-07-15

Marmor, Charles A.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 859, 182141, 254 89R, 254103, 272 22, B66B 100, B60S 1300, B66F 712, A63J 102

Patent

active

046000852

ABSTRACT:
A platform lift mechanism for theaters, concert halls, etc. The lift device is a module or modules formed of four segments telescopically, vertically extendable or retractable relative to each other, except for a fixed base segment. The platform is secured to the uppermost segment. The second segment carries a rotatable nut adapted to raise and lower an elongated complementary screw secured at its upper end to the third segment. When four modules are used, a synchronizing chain is provided to actuate all modules synchronously. A brake and a motor are provided, either for each module or for all of them. A motor control is also provided.

REFERENCES:
patent: 2576389 (1951-11-01), Craighead
patent: 3399887 (1968-09-01), Altier
patent: 3414086 (1968-12-01), Ulinski
patent: 3851854 (1974-12-01), Roybal
patent: 4261438 (1981-04-01), Olson
patent: 4466509 (1984-08-01), Kishi

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