Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – Venetian blind type
Patent
1998-04-27
2000-03-14
Purol, David M.
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
Venetian blind type
160107, E06B 9327
Patent
active
06035920&
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a screening arrangement, in particular a Venetian blind, for installation in a roof window with a sash comprising a top member, a bottom member and two side members, which screening arrangement comprises a screening length having a number of mutually connected elements as well as profile lists to be mounted on each of the side members of the sash and each having a track for receiving a means displaceable along the track, said means comprising a spring housing and a slide shoe with an abutment surface for said elements of the screening length during their gathering through raising of the screening arrangement, in which a bottom list of the screening length facing the bottom member of the sash at each end is connected with the displaceable means and loaded in the direction of the bottom piece of the sash by a coil spring rotatably mounted in the spring housing, the uncoiled portion of which extending in the track in question from the displaceable means to a fixing point at the bottom member of the sash.
A screening arrangement of this type is known from DK published specification No. 160 627. Such screening arrangements are used in windows of many different sizes and thus have a differing number of screening elements. It is therefore necessary to produce the slide shoes of the displaceable means with different lengths depending on the length of the screening arrangement. This entails in addition to the drawbacks of a purely technical nature in connection with the manufacture also a higher price of the screening arrangement as a whole.
SUMMARY OF THE INVENTION
It is the object of the present invention to improve a screening arrangement of the type mentioned by way of introduction such that one and the same displaceable means may be used in screening arrangements of any length.
This object is met by means of a screening arrangement which is characterized in that the abutment surface of the slide shoe extends in the longitudinal direction of the track to such an extent that it may receive a predetermined number of screening elements, and that the spring housing and the slide shoe are displaceable relative to each other in view of reducing the extension of the abutment surface.
In this way, the displaceable means may be manufactured as a standardized unit, in which the slide shoe has an abutment surface which is so dimensioned that it may receive all screening elements of even very long screening arrangements. By letting the spring housing be displaceable relative to the slide shoe it now becomes possible to bring the upper elements of shorter screening arrangements, which would not otherwise be raised, into abutment against already raised elements, the spring housing and the bottom list continuing their movement in the direction towards the top member of the sash, even though the slide shoe has reached its end position.
The displaceable connection between the spring housing and the slide shoe is in an embodiment, which from a constructional point of view is very simple, established by the spring housing being guided in a rack in the slide shoe.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be explained in detail in the following by means of an example of an embodiment and with reference to the schematic drawing, in which
FIG. 1 shows a roof window with a screening arrangement according to the invention, including an enlarged cross-section of a side member of the roof window,
FIG. 2 a perspective view of a detail of the screening arrangement according to the invention,
FIGS. 3 and 4 lateral views, partially sectional, of the screening arrangement according to the invention, the screening elements being raised partially and completely, respectively, and
FIG. 5 a sectional view along the line V--V in FIG. 4.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1 shows a roof window 1 with a frame 2 and a sash hingedly connected therewith, said sash comprising a top member 3, a bottom member 4 and two side members 5 carrying a window pa
REFERENCES:
patent: 3061006 (1962-10-01), Hazlett
patent: 4707018 (1987-11-01), Gavagan
patent: 4825921 (1989-05-01), Rigter
patent: 5113922 (1992-05-01), Christensen et al.
patent: 5301733 (1994-04-01), Toti
Kristensen Jesper .O slashed.stergaard
Lassen Gert Godvig
Purol David M.
V. Kann Rasmussen Industri A/S
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