Flexible or portable closure – partition – or panel – Roll type – With brake or stop
Patent
1998-11-23
2000-06-20
Purol, David M.
Flexible or portable closure, partition, or panel
Roll type
With brake or stop
160307, E06B 956
Patent
active
060765917
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns production of apparatuses, which are applied to windows or doors generally for dimming or protection, such as awnings or mosquito curtains rolling on and unrolling from a roller.
In particular, the present invention refers to a device for locking these apparatuses in a desired position, usually open or close, but also in any intermediate position.
DESCRIPTION OF THE PRIOR ART
It is known that these apparatuses usually include a roller, on which the curtain (or net in case of mosquito curtain) rolls up, supported horizontally by suitable means inside a corresponding case, called a rolling box, situated over the window or door, near its upper edge.
The free extremity of the curtain goes out of the rolling box through a slit turned downwards. In this way, it is possible to unroll the curtain from the roller by pulling it downward.
The curtain is then rolled again on the roller by elastic means, generally including a spring, situated inside the roller, and whose elastic constant is such that the curtain withdraws when released.
Significant improvements to these means have been described in other patent applications, filed by the same Applicant.
The curtain can also be operated by suitable control means, equipped with a pulley, integral with the roller and joined to a string.
Two extremities of the string go out from the pulley, and therefore from the apparatus support, on its opposite ends, laterally and vertically with respect to the curtain.
Downward pulling of one of the string ends provokes rotation of the roller in the re-rolling direction, while downward pulling of the other string end provokes its rotation in the curtain unrolling direction.
Suitable locking means, usually joined with the roller, allow to position the curtain approximately in the desired point.
Rotation resistance of these means must not be significant while the curtain is moving, both in rolling and unrolling directions, but must be sufficient to keep it in position when it is motionless, possibly overcoming the action of the above mentioned elastic means, which would tend to re-roll the curtain.
An apparatus of the aforementioned type is disclosed in the Italian Patent no. 1.234.071, granted to the same Applicant.
The locking means of the apparatus realized according to this patent allow to fix the curtain position in a quite simple and reliable way.
The technical solutions described therein will be now briefly illustrated with reference to the FIGS. 1 and 2 of the enclosed drawings, in which:
FIG. 1 is a section view of a head of the apparatus containing the locking means, and
FIG. 2 is a section view taken along the line II-II of FIG. 1.
In these figures the roller, which accommodates a curtain (or a net or something else) rolled thereon, is indicated with numeral 1.
One head of the roller 1, which is hollow, is closed by a cap 2 which is introduced inside the roller for a predetermined length.
The two opposite heads of the cap 2 feature cavities 5, 6, respectively internal and external with respect to the roller 1.
Near its bottom, the external cavity 6 is provided with an elevated edge defining a collar 7.
In the central position of the wall 4, dividing the two cavities 5, 6, there is made a through hole 15.
A substantially cylindrical support element 9, situated inside the external cavity 6, features a groove 10 made near its internal extremity and complementary to the collar 7, with which it engages.
One end of a bar 14, aimed at e.g. supporting curtain rewinding elastic means, is fastened to the element 9, coaxially with the roller 1, as described in a more precise way in the aforementioned patent no. 1.234.071.
The head of the support element 9, external with respect to the cavity 6, extends so as to define a tang 11, which allows to support the roller 1.
Two squared surfaces 12a, 12b, are machined on the circumferential surface of the support element 9 and are situated in diametrically opposite positions in the part of the element 9 comprised between the roller 1
REFERENCES:
patent: 1841384 (1932-01-01), Schmeltz
patent: 5443109 (1995-08-01), Benthin
patent: 5482105 (1996-01-01), Rude
patent: 5488983 (1996-02-01), Jung
Purol David M.
Sapone, Esq. William J.
Sunproject S.R.L.
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