Movable or removable closures – Facially opposed primary and auxiliary closure for common... – Auxiliary mounted for movement
Patent
1996-11-05
1998-09-08
Redman, Jerry
Movable or removable closures
Facially opposed primary and auxiliary closure for common...
Auxiliary mounted for movement
49460, E05B 6504
Patent
active
058027653
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
THIS INVENTION relates to a door assembly and in particular but not limited to a door assembly for homes to provide improved security.
2. Description of the Related Art
Nowadays, many homes employ main entrances, having outer and inner doors. One of the doors is usually screened to allow ventilation while the other door is open. This door has become known as a security door and can be hinged or sliding. This door usually employs some kind of lock or latch adjacent a handle so the door can be latched and held closed from the inside. A major security problem arises with these doors because an intruder can gain access to the inside latch, or where keys are involved, the home owner frequently leaves the keys inside and it is possible for an intruder to pass his hand or a tool through the screen and release the lock and thereby gain entry.
SUMMARY OF THE INVENTION
It is an object of the present invention to alleviate, at least to some degree, the aforementioned problems associated with the prior art.
In one aspect therefore, the present invention resides in a screen door assembly allowing authorized passage of persons from outside to inside a structure, the door assembly comprising a generally rectangular door jamb, a generally rectangular peripheral door frame supported in the door jamb, the frame having vertical side members, a screen infill coupled to the frame and extending between the vertical side members and allowing ventilation through the door, one vertical side member having a lock assembly adapted to secure the door in a locked position, the lock assembly having, on an inside thereof, manually operable release means characterised in that, there is provided a generally planar guard covering a portion of said screen adjacent said lock assembly to inhibit outside unauthorized access to the said release means when the door is locked.
The guard can be permanently secured, for example, by welding to the vertical frame member or can be detachably secured, for example, by fasteners to the vertical frame member. In the latter case, the guard is preferably, generally U-shaped having projecting legs that are fastened to the frame member on opposite sides of the lock assembly. Where the lock assembly includes a door handle overhanging the screen, the guard is preferably dimensioned and arranged so that when an outside force is applied to the guard, the guard flexes against the door handle.
As most lock assemblies include a protruding body portion protruding from the vertical frame member, the guard is preferably formed with a recess adapted to surround a major portion of the protruding body portion. The guard is preferably adapted to fit around different sized body portions of different lock assemblies, the guard typically being provided with frangible or breakout sections so that the recess can be selectively enlarged to fit different body portions.
In a preferred form the present invention resides in a security guard for an elongate door lock having a door handle, the guard comprising a sheet of material having an elongate aperture adjacent an edge thereof so that the sheet of material can be sandwiched between the elongate door lock and an associated door and be held in place by the door lock.
The lock assembly is typically generally narrow and rectangular and protrudes from the vertical frame member, the guard being detachably secured to the vertical frame member and comprises a plate having a recess extending along and accommodating the lock assembly, the plate projecting from the lock assembly along a major portion of the length of the lock assembly.
The lock assembly typically includes a body removable portion and the guard is sandwiched between the removable body portion and the frame member along a marginal edge portion of the guard.
The lock assembly typically includes a generally rectangular body portion having an outer perimeter and the guard includes a rectangular aperture disposed within the perimeter of the body portion.
The guard is prefer
REFERENCES:
patent: 4452011 (1984-06-01), Trombettas
patent: 4993187 (1991-02-01), Schweiss et al.
patent: 5076626 (1991-12-01), Tiddy et al.
patent: 5400628 (1995-03-01), Ryan
patent: 5586796 (1996-12-01), Fraser
Dean Grace Bernadette
Redman Jerry
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