Automatic door assembly

Details Automatic door assembly Automatic door assembly

1991-12-04

1992-12-15

Kannan, Philip C.

Movable or removable closures

With operator for movably mounted closure

Closure-mounted drive

49360, E05F 1100

Patent

active

051705850

ABSTRACT:
The automatic door assembly includes a rail, a door carriage movably provided on the rail, a driving unit for moving the door carriage, a rechargeable battery unit for supplying electric power to operate the driving unit and a circuit for electrically connecting the rechargeable battery unit and the driving unit. It also has a charging unit for timely charging of the rechargeable battery unit and a device for stopping the door carriage automatically at the open and closed positions.

REFERENCES:
patent: 3606699 (1969-09-01), Robinson, Jr.
patent: 3775906 (1973-12-01), Dougherty
patent: 4541202 (1985-09-01), Dockery
patent: 4658543 (1987-04-01), Carr
patent: 4750294 (1988-06-01), Lafontaine
patent: 4858383 (1989-08-01), Kendig
patent: 4916860 (1990-04-01), Richmond et al.

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