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(12) Brevet: (11) CA 2492399
(54) Titre français: PAROI DE FILTRATION POUR COFFRAGES ETIRABLES, MOYENS ET PROCESSUS DE FABRICATION DE CETTE PAROI, ET COFFRAGES AINSI EQUIPES
(54) Titre anglais: FILTERING WALL FOR EXPENDABLE FORMS, MEANS AND PROCESS FOR MAKING SAID FILTERING WALL AND FORMS EQUIPPED WITH SAME

Abrégé français

L'invention concerne une paroi de filtration conçue pour un coffrage extensible comprenant un treillis formé par l'assemblage de fils de chaîne et de trame flexibles, ledit treillis étant tendu sur une structure indéformable. La paroi de filtration est caractérisée en ce que certains des fils de chaîne sont plus résistants que d'autres fils de chaîne, le treillis étant étiré par la traction exercée uniquement sur les fils de chaîne les plus résistants, et en ce qu'il comprend des moyens pour maintenir la tension en associant les fils les plus résistants à la structure indéformable, lesdits moyens de maintien de tension délimitant une maille plus grande que celle résultant de l'entrelacement initial des fils de chaîne et de trame.


Abrégé anglais

The invention concerns a filtering wall designed for an expendable formwork comprising a lattice formed by assembling flexible warp and weft yarns, the lattice being stretched on an undeformable structure. The filtering wall is characterized in that some of the warp yarns are more resistant than other warp yarns, the lattice being stretched by traction solely exerted on the more resistant warp yarns and in that it comprises tension maintaining means for maintaining the tension associating the more resistant yarns with the undeformable structure, the tension maintaining means delimiting a larger mesh than the one resulting from the initial interlacing of the warp and weft yarns.


Note : Les revendications sont présentées dans la langue officielle dans laquelle elles ont été soumises.



CLAIMS

1. A filtering wall for an expendable form comprised of a mesh formed by
assembling
warp strands, and weft strands, said mesh being stretched on a shape-retaining

structure;
said filtering wall being characterized in such a way that
- said warp strands is subdivided into more resistant warp strands and regular

warp strands, said mesh's tension is created by traction solely on the more
resistant warp strands, and
- including tension-maintaining means associating said more resistant warp
strands with said shape-retaining structure, said tension-maintaining means
delimiting a larger panel than the one resulting from an initial crossing of
said
warp and weft strands.


2. A filtering wall for an expendable form according to claim 1, characterized
in such
a way that said tension-maintaining means include:
- on one side of said mesh, pressure bars extending along one of said
mesh's axes,
- on the other side of said mesh, support bars extending perpendicularly to
the direction of said pressure bars, and
- at the panel corners, linking means connecting said bars together thereby
forming at these connection points a grip blocking said mesh.


3. A filtering wall for an expendable form according to claim 2, characterized
in such
a way that said pressure bar is triangular in shape and an outside face of the

pressure bar base being grooved.


4. A filtering wall for an expendable form according to claim 3, characterized
in such
a way that said pressure bar has an axial cavity so as to make it flexible.


5. A filtering wall for an expendable form according to claim 2, characterized
in such
a way that said linking means is shaped like a two-leg clamp with a stop on
one side
for said pressure bar and, on the outside, on each of said legs' outside
faces, a
support surface for said support bars.


11



6. A filtering wall for an expendable form according to claim 5, characterized
in such
a way so that a bolt is preventing said support bars from sliding laterally.


7. A filtering wall for an expendable form according to claim 5, characterized
in such
a way that said bolt is formed by a bump next to one of said support surfaces.


8. A filtering wall for an expendable form according to claim 5, characterized
in such
a way that ends of said legs are equipped with lateral notches to attach to a
"Tor"
iron bar on a form-bearing structure.


9. Apparatus for producing a filtering wall for an expendable form according
to any
one of claims 1 to 8 characterized in such a way that the apparatus includes:
- said mesh wound around an axle serving as a supply source,
- a pre-tensioning assembly between said supply source and an irreversible
step-by-step advancing system,
- an assembly to position said shape-retaining structure,
- a post-tensioning assembly, and

- a station to cut said filtering wall to a suitable length after said
filtering wall
assembly stations.


10. Apparatus for producing a filtering wall according to claim 9,
characterized in
such a way that the apparatus includes:
- a roller and a backing roller, each equipped with grooves so that said
linking means can pass freely,
- a set of two fixed rollers between which a mobile roller is located between
two positions, one upper position that starts unwinding a mandrel said mesh is

wound on and the other lower position stopping said mandrel's unwinding.


11. Apparatus for producing a filtering wall according to claim 10,
characterized in
such a way that an outside face of said roller and backing roller is made from
a
material that can be deformed elastically so as to engage said mesh.


12



12. Apparatus for producing a filtering wall according to claim 10,
characterized in
such a way that a traction force on said mesh is provided either by the simple
weight
of said mobile roller, or by springs or other traction means.


13. Apparatus for producing a filtering wall according to claim 9,
characterized in
such a way that:
- the apparatus includes wheels spreading along an axis transverse to said
mesh's direction of movement,
- there are as many wheels as linking means to position transversally,

- each said wheel whose circumference is a multiple of the panels' step,
includes evenly spaced notches that can accommodate a head of each linking
means, and
- said wheels being driven by an irreversible type of stepper rotation
movement.


14. Apparatus for producing a filtering wall according to claim 13,
characterized in
such a way that laterally to said wheels and in the area of said notches, said
system
having guides for said pressure bars that are introduced in the linking means'
heads.

15. Apparatus for producing a filtering wall according to claim 9,
characterized in
such a way that the apparatus includes an alignment system for all of said
linking
means located on an axis.


16. Apparatus for producing a filtering wall according to claim 15,
characterized in
such a way that said alignment system includes an axle on which pairs of
spread
disks are mounted, each pair of said spread disks being designed to laterally
wedge
a linking means and that part of said axle located between two of said spread
disks
of one pair so as to fit partially between said linking means legs.


17. Apparatus for producing a filtering wall according to claim 9,
characterized in
such a way that the apparatus includes a mechanical means causing said support

bars to tip towards said linking means.


18. Apparatus for producing a filtering wall according to claim 17,
characterized in
such a way that the apparatus includes a grip having two jaws closing in
together.


13



19. Method for producing a filtering wall according to any one of claims 1 to
8,
comprising the steps of:
stretching said mesh between two tension zones by exerting traction along said
warp
strands,
positioning said clamp-shaped linking means at certain points of said mesh to
delimit
said panels,
aligning said linking means,
inserting, by sliding, a pressure bar in said linking means' heads,
positioning said pressure bars supported on said linking means support
surfaces,
and
tipping said support bars towards said linking means' median axis to form
grips with
said linking means and said pressure bar.


20. Method for producing a filtering wall according to claim 1, comprising the
steps
of:
building said filtering wall continuously and progressively and then cutting
said wall to
the desired dimensions.


14


Une figure unique qui représente un dessin illustrant l’invention.

Pour une meilleure compréhension de l’état de la demande ou brevet qui figure sur cette page, la rubrique Mise en garde , et les descriptions de Brevet , États administratifs , Taxes périodiques et Historique des paiements devraient être consultées.

États admin

Titre Date
(22) Dépôt 2005-01-04
Requête d'examen 2005-01-04
(41) Mise à la disponibilité du public 2006-07-04
(45) Délivré 2008-02-12
Périmé 2015-01-05

Historique des paiements

Type de taxes Anniversaire Échéance Montant payé Date payée
Requête d'examen 400,00 $ 2005-01-04
Dépôt 200,00 $ 2005-01-04
Taxe périodique - Demande - nouvelle loi 2 2007-01-04 50,00 $ 2006-11-28
Final 150,00 $ 2007-11-06
Taxe périodique - Demande - nouvelle loi 3 2008-01-04 50,00 $ 2007-11-28
Taxe périodique - brevet - nouvelle loi 4 2009-01-05 50,00 $ 2008-11-27
Taxe périodique - brevet - nouvelle loi 5 2010-01-04 100,00 $ 2009-11-27
Taxe périodique - brevet - nouvelle loi 6 2011-01-04 100,00 $ 2010-10-18
Taxe périodique - brevet - nouvelle loi 7 2012-01-04 100,00 $ 2011-12-13
Taxe périodique - brevet - nouvelle loi 8 2013-01-04 100,00 $ 2012-12-11

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Filtre Télécharger sélection en format PDF (archive Zip)
Description du
Document
Date
(yyyy-mm-dd)
Nombre de pages Taille de l’image (Ko)
Abrégé 2005-01-04 1 17
Revendications 2005-01-04 4 135
Description 2005-01-04 10 463
Dessins 2005-01-04 6 114
Description 2005-12-15 10 456
Revendications 2005-12-15 4 140
Dessins représentatifs 2006-06-28 1 9
Page couverture 2006-06-28 1 39
Revendications 2006-08-14 4 129
Description 2007-05-09 10 398
Revendications 2007-05-09 4 120
Dessins représentatifs 2007-05-31 1 24
Page couverture 2008-01-28 1 55
Poursuite-Amendment 2005-06-15 3 92
Poursuite-Amendment 2006-02-20 3 124
Correspondance 2005-02-10 1 16
Poursuite-Amendment 2005-12-15 18 676
Poursuite-Amendment 2006-08-14 8 192
Poursuite-Amendment 2006-11-10 3 95
Taxes 2006-11-28 1 25
Poursuite-Amendment 2007-05-09 19 615
Correspondance 2007-11-06 1 25
Taxes 2007-11-28 1 24
Taxes 2008-11-27 1 31
Correspondance 2010-04-06 1 22
Taxes 2009-11-27 1 28
Correspondance 2010-05-12 1 12
Taxes 2010-10-18 1 26
Taxes 2011-12-13 1 26
Taxes 2012-12-11 1 25