Light duty elevator door operator

Details Light duty elevator door operator Light duty elevator door operator

1996-10-07

1999-03-09

Terrell, William E.

Elevator, industrial lift truck, or stationary lift for vehicle

With barrier for regulating access to load support

Includes motor or motor driven linkage for shifting barrier

187324, 187334, B66B 1306

Patent

active

058788468

ABSTRACT:
An elevator car door operator includes a drive motor, a drive pulley mounted for rotation by the drive motor, a continuous loop drive belt mounted on the drive pulley at one end of the belt and on an idler pulley at the other end of the belt, a drive bar connected to the drive belt and slidably mounted on a bar guide for translational movement across the elevator car door header. One or more doors are slidably mounted on guide tracks for movement between open and closed positions. One of the doors is either connected directly to the drive bar, or connected to a two-to-one relating cable mounted on the drive bar, so that the motion of the drive bar is transmitted to that door, thereby slidably positioning the door as the drive bar is slidably positioned by the belt along the length of the bar guide.

REFERENCES:
patent: 1934867 (1933-11-01), Lindstrom et al.
patent: 2363929 (1944-11-01), Banks et al.
patent: 2534596 (1950-12-01), Harmon
patent: 2905463 (1959-09-01), Borden
patent: 3872622 (1975-03-01), Berk
patent: 4050191 (1977-09-01), Azuma
patent: 4149615 (1979-04-01), Kappenhagen
patent: 4357998 (1982-11-01), Gibson et al.
patent: 5213182 (1993-05-01), Guckert et al.
patent: 5701973 (1997-12-01), Tracey

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