Door reinforcement and lock guard plate
AssigneeTRE Corporation
InventorsAnthony J. Rotondi, Richard O. Mullich
Life of this patent
Estimating the term…
Abstract
An L-shaped guard plate for reinforcing a door in the area of the door lock assembly. The L-shape provides a strengthening function without introducing any misalignment in the position of the lock bolt of a door with respect to the strike plate carried in a door frame. The device is thus both effective and easily installed on most doors. The guard plate may include integral tabs which engage slots in the housing of the lock unit. The tabs serve to provide increased resistance to the application of rotational forces to the lock unit.
Claims6
In a door system comprising:
- a frame including a lock bolt opening and a doorstop;
- a door carried within the frame;
- a door lock assembly connected to the door, said assembly including a lock bolt extending from an edge of the door into said lock bolt opening when the door is closed, the improvement comprising:
- a one-piece L-shaped guard plate having a first leg which fits over the side of the door opposite said doorstop, said first leg including a first opening through which a portion of the door lock assembly extends, and a second leg which covers a portion of the door edge, said second leg including a second opening through which the lock bolt extends, wherein the side of the door facing the doorstop has a substantially flat surface along the length of the doorstop, whereby said guard plate can be installed in an existing door system without causing misalignment of said lock bolt with respect to said lock bolt opening.
A door system having increased security, comprising:
- a frame including a lock bolt opening and a door stop;
- a door carried within the frame;
- a door lock assembly connected to the door, said assembly including a lock bolt extending from an edge of the door into said lock bolt opening when the door is closed;
- and
- a one-piece L-shaped guard plate having a first leg which fits over the side of the door opposite said doorstop, said first leg including a first opening through which a portion of the door lock assembly extends, and a second leg which covers a portion of the door edge, said second leg including a second opening through which the lock bolt extends and wherein said second leg includes an extension which is folded over so that it is generally parallel with the second leg, said extension including a third opening corresponding to the second opening, thereby providing a two layer second leg.
Dependencies are inferred from the claim text.