Elevator door mechanism

Details Elevator door mechanism Elevator door mechanism

1992-08-03

1994-06-28

Olszewski, Robert P.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 52R, 187 56, 49102, B66B 1306

Patent

active

053238761

ABSTRACT:
An elevator door mechanism that has a rotating shaft, a reversible driving means to turn the shaft, a linear drive actuator riding on and moving along the shaft, a resilient isolated pillow block mounted on spacers at each end of the shaft to dampen the noise of operation, two elevator doors attached to the linear drive actuator, and a switching means attached adjacent to one end of the rotating shaft to indicate the doors are closed and a switching means attached adjacent to the other end of the rotating shaft to indicate the doors are open, wherein the actuator is attached to the shaft with pitched bearings and the closing force of the linear actuator is controlled by pressure springs on the linear actuator.

REFERENCES:
patent: 1145881 (1915-07-01), Doyle
patent: 1467247 (1923-09-01), Jarnig
patent: 2425016 (1947-08-01), Weaver
patent: 2841390 (1958-07-01), Urquhart
patent: 3045747 (1962-07-01), Hill
patent: 3261128 (1966-07-01), Slopa et al.
patent: 3406484 (1968-10-01), Atkey et al.
patent: 3431678 (1969-03-01), Stuart et al.

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