Movable or removable closures – With protective grille or safety guard
Reexamination Certificate
2000-07-06
2001-12-11
Redman, Jerry (Department: 3634)
Movable or removable closures
With protective grille or safety guard
C052S202000, C052S668000
Reexamination Certificate
active
06327819
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates generally to a face grating, and more particularly, to a face grating having panels hard to remove from the outside of a window, while being removed relatively easily from the inside of the window.
2. Description of the Prior Art
Most of face gratings in the prior art are of fixed type. On the other hand, there is proposed recently a monolithic aluminum alloy face grating having longitudinal and horizontal main elements fixed to an outer frame. This face grating has anchor fittings on the inside of an outer frame portion for mounting the face grating to a window frame sash by anchoring the fittings to a bearer portion formed on the window frame sash.
The above face grating is hard to remove from the outside and therefore preferable for prevention of crimes, whereas it is removed easily from the inside by unanchoring the above fittings from the bearer portion of the window frame sash in emergencies such as a fire or other disaster.
In spite of the advantages as described above, since the above face grating in the prior art for prevention of crimes and escaping in emergencies is of a monolithic type, and heavyweight as a whole, a complicated mounting is required. Further, since the anchor fittings on the grating side, together with the bearer portions on the window frame sash side, bear the weight of the face grating, the breakage of the face grating occurs easily.
On the other hand, a complicated structure is required for reinforcement of face grating portions anchored to the window frame sash, resulting in an increase in cost.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a more easily mounted, more inexpensive face grating which is effective in prevention of crimes and allows escape in emergencies without the need for a special structure for removal from the inside.
A face grating according to the present invention achieves the above object with a structure comprising: bearer members, which have respectively a large number of holding projections with constricted slot portions at the opposite ends of their base portions and formed at predetermined intervals in a longitudinal direction and projecting toward one side. The bearer members are designed to be fixed substantially horizontally to the upper and lower parts on the outside of a building window or substantially perpendicularly to the left and right sides of the outside of the window with the holding projections facing to the outside of a building in a relatively overlapped arrangement; a large number of elastic panels, which are formed respectively in a substantially channel-like shape, with curved edges of a convex circular sectional shape at the opposing longitudinal sides, and which are put on the holding projections of the bearer members with the holding projections pushed inwards. Elastic covering members are also formed in a substantially U-like sectional shape with a large number of projections formed at predetermined intervals in opposing leg plates. The elastic covering members have substantially circular projections at opposing ends of their top portions which permit the projections to be pushed into spaces between mutually adjacent panels at positions corresponding to the bearer members or in the vicinity of the above-mentioned corresponding positions.
It is preferable that the above bearer members be fixed to a wall face around the window with an appropriate number of fixing elements such as screws or screw spikes. Preferably, these fixing elements are placed at positions corresponding to the panels.
In the above face grating, it is preferable that a panel support member be mounted on the panel face, facing the window, intermediate and parallel to the bearer members. This panel support member may cross the panels at substantially right angles.
REFERENCES:
patent: 1789280 (1931-01-01), Armstrong
patent: 3748814 (1973-07-01), Cribben
patent: 3927950 (1975-12-01), Herrmann et al.
patent: 4907389 (1990-03-01), Pettit
Goumei Kaisha Kurose Shouten
Lorusso & Loud
Redman Jerry
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