Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – With mounting or supporting means
Reexamination Certificate
2001-08-10
2003-07-08
Lev, Bruce A. (Department: 3634)
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
With mounting or supporting means
C160S133000, C160S188000, C292SDIG003
Reexamination Certificate
active
06588483
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to locking devices. More particularly, the present invention relates to locking devices that are particularly suited for use with roll-up doors.
BACKGROUND OF THE INVENTION
Many different types of trucks have roll-up style doors. These doors are popular because they may be readily moved between the open and closed positions. Roll-up doors are also popular because they do not interfere with loading and unloading items from the truck when in the open position.
Roll-up doors typically include a plurality of door sections that are pivotally attached to each other. The door sections are slidably mounted in tracks that are positioned on either side of the door.
Roll-up doors generally include a latching mechanism proximate a lower edge thereof to retain the roll-up door in a closed position. In some instances the latching mechanism may also be used to lock the roll-up door in the closed position.
Most latching mechanisms are attached to an outer surface of the rollup door. This configuration provides persons who desire to gain unauthorized access to items in the truck with the ability to break the latching mechanism off the roll-up door and then open the door.
It has also been attempted to mount roll-up door latching mechanisms on an inner surface of the roll-up door. While such a system provides an enhanced level of security, if the inner mounted latch fails, there is no way to open the roll-up door without damaging or removing the roll-up door. As such, this latch style has not gained wide spread approval.
SUMMARY OF THE INVENTION
The present invention is directed to a locking system for a roll-up door. The locking system includes a rear plate, a front plate, a lock mechanism, a hinge mechanism and a lock pin. The front plate is removably attached to the rear plate. The lock mechanism is attached to the rear plate. The hinge mechanism is attached to the rear plate. The hinge mechanism has a first portion, a second portion and a pin that pivotally attaches the first portion to the second portion. The lock pin at least partially extends through the pin. The lock pin is operably connected to the lock mechanism.
REFERENCES:
patent: 3163033 (1964-12-01), Boyles
patent: 3869752 (1975-03-01), Klay
patent: 4494782 (1985-01-01), Lutz
patent: 4543748 (1985-10-01), North, Jr.
patent: 4641458 (1987-02-01), Pilcher et al.
patent: 4921288 (1990-05-01), Cifuentes et al.
patent: 5173993 (1992-12-01), Baker
patent: 5246054 (1993-09-01), Shepherd et al.
patent: 5467558 (1995-11-01), Kober et al.
patent: 5489130 (1996-02-01), Clark
patent: 5533561 (1996-07-01), Forehand, IV
patent: 5673949 (1997-10-01), Mader et al.
patent: 5706877 (1998-01-01), Grisham et al.
patent: 5904384 (1999-05-01), Mader et al.
patent: 6282752 (2001-09-01), Kluting et al.
patent: 2001/0029760 (2001-10-01), Viney
patent: 2001/0047567 (2001-12-01), Guillemette
Lev Bruce A.
Patterson Thuente Skaar & Christensen P.A.
LandOfFree
Door locking system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Door locking system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Door locking system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3020883