Movable or removable closures – With means mounting closure for swinging – With biasing means
Patent
1990-10-01
1991-12-10
Kannan, Philip C.
Movable or removable closures
With means mounting closure for swinging
With biasing means
49390, 52 72, E05F 110
Patent
active
050706497
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a window, particularly designed to be installed in an inclined roof, comprising a frame, a sash hinged to the main frame at the top thereof, and a sash lifting arm inserted between the frame and the sash and having one end pivotally connected with a lateral frame or sash member and its other end pivotally connected with a slide shoe that is displaceable along a corresponding lateral member of the sash or the frame, respectively, and is associated with a pre-stressed spring.
Such a window, inter alia disclosed in DK patent No. 146,808 in which the top-hinged frame is either glass-carrying in itself or serves to support a glass-carrying pivotal sash, as also known from DK patent No. 148,425, may be offered by the manufacturer with mounted and pre-stressed spring, and in connection with the installation of the window the pre-stressing has to be finely adjusted in dependence on the actual roof inclination. The bias force depends on the weight of the window sash and may be in the range between 0.5 and 5 kN, i.e. forces of a magnitude which a person is incapable of handling straight away.
According to the invention a window of the above mentioned type is characterized in that the slide shoe and the pre-stressed spring are provided with coupling means adapted to be brought into engagement with each other in conjunction with the installation of the window.
It is thus possible in factory to insert and pre-stress the spring without simultaneously connecting the spring with the slide shoe, so that the window can be handled, transported and installed without any risk that the window due to unintentional release of the sash from the main frame suddenly jumps into its open position by the actuation of the spring. Only when the window has been installed in the roof opening with the sash facing upwards and loaded in the downwards direction by the force of gravity, the sash will be biassed to open when the coupling means of the slide shoe and the pre-stressed spring are brought into mutual engagement.
In respect of finely adjusting the spring bias force in a simple manner in dependence on the roof inclination the slide shoe of the window according to the invention is preferably provided with a plurality of coupling means positioned consecutively in the longitudinal direction of the lateral member.
The displacement of the slide shoe and thus the opening movement of the window may be restricted by a stop and in that case the window according to the invention is preferably designed in such a manner that the coupling means associated with the spring is supported by an intermediate member, and that a detachable spacer adapted to hold the intermediate member ready for engagement is located between the intermediate member and a stop for the slide shoe. The spacer is inserted between the stop and the intermediate member in connection with the mounting of the spring in factory and is only removed after the spring and the slide shoe have been assembled.
In a particularly simple and handy embodiment of the invention by which the connection, after the window has been installed in the roof, is effected merely by opening the window until the coupling means engage, the intermediate member is U-shaped and comprises a coupling means formed by a transverse pin extending between the U-branches and adapted to engage pockets in the upper side of the slide shoe, the intermediate member at its bottom being pivotally connected with a pull rod for transferring the spring force.
The invention will now be explained in detail with reference to the drawings, in which
FIG. 1 illustrates a known window in a schematical side elevation and partially in section, the window being in its opened position and the glass-carrying sash released from the intermediate frame,
FIG. 2 is a schematical side elevation of section of an embodiment of a window according to the invention, and
FIG. 3 an end view on a larger scale of a spacer of the window in FIG. 2.
The main frame 1 shown in FIG. 1 is at its top connected through a hinge 2 with an i
REFERENCES:
patent: 4416094 (1983-11-01), Bugener et al.
patent: 4429494 (1984-02-01), Kornerup et al.
patent: 4611432 (1986-09-01), Lund et al.
patent: 4785499 (1988-11-01), Giuffrida et al.
patent: 4845905 (1989-07-01), Frank
Kornerup Klaus
Nygaard Lena
Kannan Philip C.
V. Kann Rasmussen Industri A/S
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