Security system for roll-down loading doors

Details Security system for roll-down loading doors Security system for roll-down loading doors

1997-10-31

2000-04-11

Barrett, Suzanne Dino

Locks

Operating mechanism

Using a powered device

70256, 70 99, 292 54, E05B 4700

Patent

active

060475765

ABSTRACT:
A security system for roll-down loading doors, having: a substantially narrow profile housing adapted to being connected to a wall of a cargo carrying enclosure; an actuator having a key receptacle including a pivotable arm, for moving a latch structure between a locked position and an unlocked position; the latch structure being generally triangular with a top portion being hingably connected to the housing with a stationary pivot pin and the actuator being coupled by a linkage mechanism, the latch structure is adapted to be connected to a loading door of a cargo carrying enclosure when the latch structure is in the locked position and withdrawn from the door when the latch structure is in the unlocked position; and the linkage mechanism includes a distal section having a port and a proximal section having a second port, the distal section is coupled to a middle portion of the latch structure with a first pivot pin and the proximal section is coupled with the linkage mechanism with a second pivot pin, the linkage mechanism and pivotable arm define a substantially rigid link defined by the linkage mechanism and pivotable arm being substantially aligned when the latch structure is in the locked position and the linkage mechanism and pivotable arm being substantially perpendicular when the latch structure is in the unlocked position.

REFERENCES:
patent: 3670536 (1972-06-01), Klebba
patent: 3705505 (1972-12-01), Landow et al.
patent: 3851905 (1974-12-01), Klebba
patent: 4263795 (1981-04-01), Van Gompel
patent: 4422313 (1983-12-01), VanderWyde
patent: 4782674 (1988-11-01), Johnson
patent: 4943110 (1990-07-01), Pastva
patent: 5064228 (1991-11-01), Bisbing
patent: 5392025 (1995-02-01), Figh et al.

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