Pass point system for controlling the operation of movable barri

Details Pass point system for controlling the operation of movable barri Pass point system for controlling the operation of movable barri

1998-03-12

2000-04-18

Masih, Karen

Electricity: motive power systems

Automatic and/or with time-delay means

318265, 318266, 318282, 318286, 318466, 318480, H02P 100

Patent

active

060519479

ABSTRACT:
An operator for opening and closing movable barriers such as garage doors comprising a pass point limit system which is a component of an operating head. The operator is responsive to remote control from a wall panel or other location remote from the operating head to enable setting and adjustment of door travel limits from a remote location, without requiring installation of limit switches separate from the operating head.

REFERENCES:
patent: 2268133 (1941-12-01), Carlston
patent: 3147001 (1964-09-01), Purdy
patent: 3262105 (1966-07-01), Bell
patent: 3654480 (1972-04-01), Stephenson
patent: 4565029 (1986-01-01), Kornbrekke et al.
patent: 4888531 (1989-12-01), Hormann
patent: 4922168 (1990-05-01), Waggamon et al.
patent: 5233185 (1993-08-01), Whitaker
patent: 5235494 (1993-08-01), Chang et al.
patent: 5384495 (1995-01-01), Waggamon et al.

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