Ventilation – Means combined with window – Having air passage at window top
Patent
1996-06-24
1997-12-30
Joyce, Harold
Ventilation
Means combined with window
Having air passage at window top
454273, F24F 1318
Patent
active
057022976
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a slot ventilator, for example for use in a room with a sealed window or a window with double or single glazing or a door wherein it is desirable to provide ventilation without having to open the window.
GB1417751 discloses a slot ventilator comprising a slotted backing member, an elongate facing strip, and a linkage mechanism connecting the backing member and facing strip with one another, the linkage mechanism being arranged to permit generally translational forward and backward movement of the facing strip between a closed position in which the slot is closed and an open position in which the facing strip is spaced in front of the backing member.
Although this prior art arrangement performs well in most circumstances, there are applications in which increased control of ventilation would be desired.
The present invention aims at least to alleviate this problem.
According to the present invention there is provided a slot ventilator comprising a slotted backing member, an elongate facing strip and a linkage mechanism connecting the backing member and facing strip with one another, the linkage mechanism being arranged to permit generally translational forward and backward movement of the facing strip between a closed position in which the slot is closed and an open position in which the facing strip is spaced in front of the backing member, the linkage mechanism including a hinge allowing the facing strip to rotate about a longitudinal axis to vary the angular orientation thereof.
This arrangement has the advantage that the angular orientation of the facing strip may be varied to alter the direction of ventilation passing through the ventilator. When the ventilator is installed in a horizontal position, for example, in one embodiment the angular orientation of the facing strip may be varied to increase the amount of incoming ventilation directed downwards by the facing strip whilst decreasing the amount directed upward, and vice versa. Control of ventilation is therefore significantly improved.
Preferably, the facing strip is movable to the closed position from the open position by a generally translational backward movement, irrespective of the angular orientation thereof. This has the advantage that the ventilator is easy to operate. In preferred embodiments, the ventilator may therefore be closed simply with a rearward pushing force applied by the user thereof.
Preferably, the facing strip, in an angular configuration thereof, engages the front of a wall defining the slot. In an embodiment where the ventilator is installed horizontally, it may therefore be possible selectively to prevent incoming ventilation from being directed either upward or downward, since the engagement may at least to some extent seal the facing strip and the front of the wall, preventing ventilation from passing there-between. The facing strip may be slidable over the front of the wall defining the slot during closing movement of the facing strip. Such a sliding movement provides a convenient way automatically to reset the angular orientation of the facing strip to that of the closed position as the facing strip is closed.
Preferably, the facing strip is selectable to an intermediate angular orientation intermediate that of the closed position and that of a fully deflected angular orientation. The facing strip may be rotationally selectable between an infinite number of said intermediate orientations. This gives a high degree of control for ventilation.
The linkage mechanism may include a friction lock for locking the facing strip by friction in a said intermediate orientation.
Preferably, the linkage mechanism includes at least two said links which may be substantially identical with one another, the links being spaced from one another along the length of the slot.
In one embodiment, the linkage mechanism includes a link which is pivotally connected to the backing member. The link may comprise one or a pair of linkage arms, the or each linkage arm being pivotally connected at a first end thereof
REFERENCES:
patent: 1136541 (1915-04-01), Leary
patent: 1204158 (1916-11-01), Ingle
patent: 2491863 (1949-12-01), Koch
patent: 3194145 (1965-07-01), Robertson, Jr.
patent: 4702157 (1987-10-01), Comparon
Anderson John Neil
Stoney Arthur
Joyce Harold
Titon Hardware Limited
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