1991-07-22
1993-08-31
Chilcot, Jr., Richard E.
52210, 52213, 52215, 5220455, E04B 170
Patent
active
052397971
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a protective bridge for the lateral end portions of window sills.
At their left and right edges, window sills usually have upright, lateral end portions. The plaster of the window soffitt normally extends as far as this end portion. Under the influence of vibrations, such as from construction work, street traffic or wind, thermal expansions and the expansion and contraction of the wood of the window frame, cracks arise in the plaster. After some time, the plaster crumbles above and outside of the end portions.
This crumbling is to be prevented by the present invention.
This objective is accomplished by the invention in accordance with following description.
After the installation of the window sill with its two end portions, a protective bridge, which embraces this end portion elastically like a clamp, is mounted on the outside of each end portion. In the protective bridge, fastening pins are provided, which are a type of nail with transverse ribs and protrude upwards and outwards after the installation. The plaster of the window soffitt and of the facade is then applied, the fastening pins also being enclosed. The protective bridge is then firmly seated in the plaster, but remains movable in its longitudinal direction, that is, at right angles to the plane of the window frame. Owing to the fact that the protective bridge embraces the end portion elastically, a certain movement at right angles to the end portion, upwards, downwards and also sideways is possible. In the event of vibrations, thermal expansions, etc., the protective bride can thus move relative to the end portion that is embraced by it, so that the plaster is spared and does not develop any cracks or crumble away.
FURTHER DEVELOPMENTS OF THE INVENTION
In cross section, the protective bridge can have the basic shape of a T. The vertical leg and the leg of the T pointing against the window sill together can form an elastic clamp for embracing the lateral end portion. Relative motions between the protective bridge and the lateral end portion are made possible in this manner.
Preferably, the fastening pins can be mounted in an upright position in an upper leg of the T-shaped profile, which later on protrudes into the plaster of the window soffitt and the facade, and, moreover, in a longitudinal row of the profile, while fastening pins, which protrude only from the external end of the vertical leg in a horizontal direction into the space that is to be occupied by the facade plaster, can be provided at the vertical leg.
So that the protective bridge can be introduced more readily after the window sill and the lateral end portions are installed, the vertical leg can have a cutout into its back region. A sloping edge of this cut out can start at the lower edge of the leg and extend upwards at the rear and go over into an edge, which extends in the longitudinal direction of the profile.
Embodiments with further characteristics of the invention are described in the following by means of the drawings, in which
FIG. 1 shows a side view of a protective bridge, for the, as seen from the outside, right end of the window sill,
FIG. 2 shows a cross section in the II--II plane of FIG. 1,
FIG. 3 shows a plan view of the protective bridge of FIGS. 1 and 2 and
FIG. 4 shows the, as seen from the outside, right lower corner of a window frame with the adjacent parts of the wall of the house, viewed, however, in the direction of the somewhat downwards sloping window sill, which is shown partially in plan view and partially in section.
As shown by FIGS. 1 to 3, the protective bridge consists of a piece of elastic plastic with a T-shaped profile. The protective bridge is shown in its use position, in the manner in which it embraces the, as viewed from the outside, right lateral end portion 30.2 of a window sill 30. The cross sectional shape of the end portion 30.2 is shown in FIG. 4, as seen from the outside. Basically, it is U-shaped. On the whole, the protective bridge 1 has a T-shaped cross section. The protective bridge has a, here as in
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