Stock material or miscellaneous articles – Structurally defined web or sheet – Including sheet or component perpendicular to plane of web...
Patent
1990-07-09
1992-08-18
Ryan, Patrick J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including sheet or component perpendicular to plane of web...
428192, 428426, 52769, 52770, 52773, 52775, 296 841, 296 93, 73523, 73528, 474 15, 474 16, 474 38, B32B 300
Patent
active
051398460
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a two-piece sealing strip made of elastic material for sealingly framing a window pane or a panel element within a frame.
BACKGROUND
Sealing strips of this kind are known in the art; previously only such strips were available on which both sealing lips were attached to a first or main part. One of these lips could easily be bent, thanks to a cutout recess or hollow space provided for in close proximity to that lip. A filler introduced into this cutout, usually a simple body of circular cross section, stiffened this sealing strip again. The mounting of a window pane or a panel became even easier after that sealing lip was attached to the filler itself. Now it was possible to position the pane against the other sealing element whereupon, it was fixed by means of that filler. The filler generally is of the same material as the first or main part, but when the filler still was a simple body, it often was made from metal in order to increase the rigidity of the sealing strip.
Such sealing strips are used, depending upon their dimensions, for small windows in movable elements such as doors or gates. When made correspondingly sturdier, they may also be used for glazings of larger size such as used in tall buildings where substantial loads due to wind pressure may occur.
In this application where substantial wind loads can be expected, it is of substantial importance how the filler and the cutout or recess are shaped. Previously, when the filler was not yet provided with a sealing lip, its design was simple; mostly the cutout or recess was a complete or nearly complete hollow which surrounded the filler practically on its entire periphery. With the sealing lip newly attached to the filler and forming with it a solid connection of considerable thickness in order to achieve the necessary rigidity, this is no longer possible. If, however, the cutout and the filler are given a wrong design, the filler may be tensioned by the pressure of the window pane exerted on its sealing lip to such an extent that it will be squeezed out of the cutout or recess by being elastically deformed. The pane is no longer retained which can result in fatal consequences.
THE INVENTION
It is therefore an object of the invention to form or shape the filler and the main or first part in such a manner that the connection between the two even improves during increasing wind pressure, when compared with that connection achieved immediately after mounting since installation usually is carried out during calm or, at the most, during a gentle breeze. At that time the connection should not yet be exceptionally rigid because otherwise the mounting or dismantling of the window pane may be made more difficult; later on, the connection must be capable of safely retaining the pane even under strong wind gusts and provide for sealing it along its rim.
Briefly, a first, or main part has a body portion which retains a first, that is the outer sealing lip, extending roughly right angle from the body portion. The body portion is framed with a bearing surface adopted to engage against the frame. Opposite at least part of the bearing surface, the body portion is formed with a recess, so that the body portion and the region of the recess becomes more elastic than the remainder. A second part has a base or foot portion which is seeped to fit into the recess of the first part. Inter-engaging projection-and-recess arrangements with the first and second part, respectively, and at both ends of the base or foot portion, ensure that, once the base of foot portion is resiliently inserted into the recess, it will be retained in position. The base or foot portion retains the second sealing lid.
Torques transferred to the two-part sealing strip due to wind loading, and particularly due to wind gusts, which result in unsteady, or dynamic loading on the window pane, or panel tend to compress the body portion, as well as the base or foot portion interlock therewith, so that, even on the high, and changing wind loading, the
REFERENCES:
patent: 3487601 (1970-01-01), James
Eigenheer Max
Herwegh Norbert
Datwyler AG Schweizerische Kabel Gummi-und Kunststoffwerke
Lee Kam
Ryan Patrick J.
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