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Mechanical locking for floor panels with a flexible bristle tongue Disclosure Number: IPCOM000145262D
Publication Date: 2007-Jan-12

Publishing Venue

The Prior Art Database


Floor panels (1, 1') are shown, which are provided with a mechanical locking system comprising a displaceable bristle tongue (15) in a displacement groove (40). The bristle tongue is moulded and provided with bendable protrusion (61).

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Area of Invention

     The invention generally relates to the field of floor
panels with mechanical locking systems with a flexible and
displaceable tongue. The invention also relates to a
partly bendable tongue for a building panel with such a
mechanical locking system.

Background of the Invention

     In particular, yet not restrictive manner, the invention
concerns a tongue for a floor panel and a set of floor
panels mechanically joined to preferably a floating floor.
However, the invention is as well applicable to building
panels in general. More particularly invention relates to
the type of mechanically locking systems comprising a
flexible or partly flexible tongue and/or displaceable
tongue, in order to facilitate the installation of
building panels

     A floor panel of this type is presented in
WO2006/043893, which discloses a floor panel with a
locking system comprising a locking element cooperating
with a locking groove, for horizontal locking, and a
flexible tongue cooperating with a tongue groove, for
locking in a vertical direction. The flexible tongue bends
in the horizontal plane during connection of the floor
panels and makes it possible to install the panels by
vertical folding or solely by vertical movement. By
"vertical folding" is meant a connection of three panels
where a first and second panel are in a connected state


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    and where a single angling action connects two
perpendicular edges of a new third panel, at the same
time, to the first and the second panel. Such a connection
takes place for example when a long side of the first
panel in a first row is already connected to a long side
of a second panel in a second row. The third panel, which
in this text is referred to as "folding panel" is then
connected by angling to the long side of the first panel
in the first row. This specific type of angling action,
which also connects the short side of the new third panel
and second panel in the second row, is referred to as
"vertical folding". It is also possible to connect two
panels by lowering a whole panel solely by a substantially
vertical movement against another panel where no
substantial turning of the panel edge is involved. This
connection of two panels is referred to as "vertical

     Similar floor panels are further described in
WO2003/016654, which discloses locking system comprising a
tongue with a flexible tab. The tongue is extending and
bending essentially in a vertical direction and the tip of
the tab cooperates with a tongue groove for vertical
locking. The flexible tab is directed upwards and located
on the folding panel. The major disadvantage of such an
embodiment is that the flexible tab must be displaced
inwards by a sharp panel edge as shown in figure 17a

Definition of Some Terms

     In the following text, the visible surface of the