WO2000055444A1 - Structural reinforcements - Google Patents

Structural reinforcements Download PDF

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Publication number
WO2000055444A1
WO2000055444A1 PCT/US2000/006803 US0006803W WO0055444A1 WO 2000055444 A1 WO2000055444 A1 WO 2000055444A1 US 0006803 W US0006803 W US 0006803W WO 0055444 A1 WO0055444 A1 WO 0055444A1
Authority
WO
WIPO (PCT)
Prior art keywords
reinforcement member
channel
thermally expandable
keyed
recited
Prior art date
Application number
PCT/US2000/006803
Other languages
French (fr)
Inventor
William J. Barz
Michael J. Czaplicki
Original Assignee
L & L Products, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by L & L Products, Inc. filed Critical L & L Products, Inc.
Priority to AU36283/00A priority Critical patent/AU3628300A/en
Priority to EP00914970A priority patent/EP1208276B1/en
Priority to DE60010900T priority patent/DE60010900T2/en
Priority to AT00914970T priority patent/ATE267311T1/en
Publication of WO2000055444A1 publication Critical patent/WO2000055444A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D29/00Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/001Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material
    • B62D29/002Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material a foamable synthetic material or metal being added in situ
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S269/00Work holders
    • Y10S269/901Collapsible or foldable work holder supporting structure

Definitions

  • the present invention relates generally to the reinforcement of hollow structures
  • the present invention provides a keyed reinforcing member having
  • the rigid body includes a surface
  • the rigid member has an interlocking
  • the rigid member is
  • the rigid member has attachment sites and locator
  • the present invention provides a method of reinforcing a structure
  • the structural body to be reinforced.
  • the composite keyed reinforcement is then heated
  • the foam will be foam (expand) and cure the resin.
  • the foam will be foam (expand) and cure the resin.
  • the invention provides a way to reduce cost, improve stiffness, and increase
  • the keyed reinforcing member is not pressure sensitive. This enables packaging such that
  • Figure 1 is a cross sectional view of a rigid linear member of the keyed
  • Figure 2 is a cross section of a group of resin strips prior to insertion into the linear
  • Figure 3 is a cross sectional view of keyed reinforcement depicted in Figure 1 after
  • Figure 4 is a side view of the keyed reinforcement member depicted in Figure 1 of
  • Figure 5 is a cross section of a linear keyed reinforcement in another embodiment.
  • Figure 6 is a perspective view of a portion of a non-linear keyed reinforcement in
  • Figure 7 is a cross section along lines 7-7 of Figure 6 but with the resin strip
  • Figure 8 is a plan view of the complete ring structure partially depicted in Figure 6.
  • Keyed member 20 serves not only to provide stiffness and strength to composite
  • Keyed member 20 may be formed of a
  • keyed member 20 is an aluminum extrusion, but can also be done effectively
  • keyed member 20 has an internal partition or wall 34 which defines two chambers, 36
  • Partition 34 provides additional strength and rigidity to member 20.
  • each wall of keyed member 20 is provided with
  • wall 22 of keyed member 20 has channel 40
  • channel 40 is provided with lips or flanges 44 which extend
  • strips 42 (which will also preferably be extruded) can be easily slipped
  • locator pin 48 may
  • locator pins will be provided.
  • the nature of locator pins will be well known to those skilled in the art.
  • member 20 (in terms of area) are each at least 25% covered (this is total coverage and
  • reinforcement 50 has keyed member 52 with a central web 54 that forms channels 56 in
  • strip 58 has a convex surface 60 that is received in a concave depression
  • strips 64 are provided such that all sides
  • Locator pin 66 is also shown.
  • end caps to the reinforcing structure. These end caps may have an integral fastener
  • An additional method of installation is to apply a pressure sensitive adhesive to
  • the pressure sensitive adhesive may or may not also have structural
  • reinforcement 30 is linear; that is, preferably its length is at least twice its width or height.
  • composite reinforcement 70 is in the nature of a ring or continuous wall
  • Each face 72 has a channel 74 into which a resin strip 76 is disposed by
  • resin strip 76 resides outside of channel 74 although it is not necessary that any material
  • circumferential material of figures 6 through may be
  • Resin strips 42, 64 and 76 are thermally expandable. That is, upon the application
  • the volume of the unexpanded state but more preferably twice (the unexpanded state
  • resin strips is an epoxy-based material.
  • Resin preferably forms from about 5% to about 75% by weight and more preferably
  • Filler preferably forms from about 0%
  • Blowing agent preferably forms from about 0% to about 10% by weight
  • Accelerator preferably forms from about 0% to
  • the heat expandable material is most preferably a heat-activated
  • polystyrene foams suitable. These include polyolefin materials, copolymers and terpolymers with at least
  • one monomer type an alpha-olefin, phenol/formaldehyde materials, phenoxy materials,
  • composite keyed reinforcement part 30 is most preferably intended to be
  • the heat expandable material (structural foam) expands to contact the
  • a particular benefit of the present invention is that it permits large sections to be
  • composite reinforcing member greatly increases the probability that full cure will occur.
  • the rigid reinforcement provides a heat transfer conduit to the inner surface of the heat
  • cost can be provided for certain design types.
  • a further additional benefit is that it permits
  • Keyed reinforcing member 20 can be produced in many different ways which
  • Composite reinforcing structure 30 may be constructed by dispensing heat activated
  • expandable material will be activated such that it will expand and cure in the hollow
  • the heat expandable material into a shape that mimics the section of a keyed location
  • a further additional way of making the composite construction is to press molten of deformable heat expandable material into the keyed section of the

Abstract

A composite structural member (30) has a keyed reinforcement member (20) in which a thermally expandable resin strip (42) is mechanically retained. The mechanical interlock permits the resin (42) to be secured to the member (20) without heat or adhesive.

Description

STRUCTURAL REINFORCEMENTS
TECHNICAL FIELD
The present invention relates generally to the reinforcement of hollow structures
and more specifically to the use of rigid reinforcements which utilize expandable resins.
BACKGROUND OF THE INVENTION
There has been an increase in the need for selective reinforcement of automotive
structures in order to meet various government test standards. To that end, structural foams
and carriers have been developed for the purpose of reinforcing specific locations in
vehicles. The primary focus of these reinforcements is to add strength or stiffness to a
structure.
As will be appreciated by those skilled in the art, the three factors of greatest general
importance in the evaluation of reinforcement effectiveness are stiffness, weight, and cost.
With most prior art techniques, increasing stiffness results in a corresponding penalty of
weight increase and/or cost increase. For example, while using thicker gages of metal
increases strength, it results in an unwanted increase in weight. Similarly, the use of
exotic high-strength alloys is effective to increase strength, but this adds considerably to the cost of the vehicle. Finally, it will be recognized that the cost of resins is also a
concern and thus structural foams must be used sparingly.
Another concern in the use of structural foams is the problem associated with fully
curing material that is very thick. That is, in some prior art applications the materials
required to satisfactorily reinforce are so thick that it is difficult to achieve full cure.
Therefore, it will be recognized that techniques for reinforcing hollow structures which do
not cause a substantial weight and cost or curing problems have the potential to provide
significant advantages.
It is therefore an object of the present invention to provide a structural
reinforcement which utilizes structural foam in a manner which conserves resin.
It is a further object of the invention to provide such a reinforcement which can be
fully cured in a short time.
It is still a further object to provide a low-cost, light-weight structural reinforcement
which provides significant strength and stiffness to the reinforced region.
It is still a further object to provide a structural reinforcement which can be
transported easily to the site of installation. SUMMARY OF THE INVENTION
In one aspect the present invention provides a keyed reinforcing member having
a rigid body and an attached uncured resin portion. The rigid body includes a surface
having a geometry that mates with the uncured resin to form a purely mechanical interlock
between the rigid body and the resin. In one aspect the rigid member has an interlocking
channel in which a strip of uncured resin is disposed. In one aspect the rigid member is
linear, in other applications the member is non-linear with the resin strip being disposed
circumferential ly. In still another aspect the rigid member has attachment sites and locator
pins which facilitate its location and attachment to the hollow structural body to be
reinforced.
In another aspect the present invention provides a method of reinforcing a structure
comprising the steps of providing a rigid member having a surface adapted to receive and
mechanically retain an uncured resin body having a preselected shape. An uncured resin
body having the mating geometry is inserted in the interlocking portion of the rigid
member. The composite keyed reinforcement is then placed in the appropriate location of
the structural body to be reinforced. The composite keyed reinforcement is then heated
to a temperature sufficient to foam (expand) and cure the resin. Typically, the foam will
then bond to the surrounding structural body. Thus, the invention provides a way to reduce cost, improve stiffness, and increase
the possibility of achieving full cure of the structural foam all through the use of a
composite construction. The keying of the surface of the reinforcement member permits
uncured resin to be applied such that mechanical interlocking between the member and
the applied uncured resin occurs. This interlocking permits the resin to be positioned on
the reinforcement member without the necessity of heating the reinforcement member,
using a secondary adhesive, heating the uncured structural foam, or using a pressure
sensitive uncured structural foam. In addition to processing ease, the keyed surface
produces a structure that is strongly resistant to damage during shipping or handling in an
assembly plant. In one aspect the primary uncured heat expandable material attached to
the keyed reinforcing member is not pressure sensitive. This enables packaging such that
adjacent preformed parts do not adhere to each other during shipping (i.e. the material
does not behave as a pressure sensitive adhesive).
These features and others will be more fully explained herein in connection with
the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a cross sectional view of a rigid linear member of the keyed
reinforcement of the present invention, prior to attachment of the resin strip. Figure 2 is a cross section of a group of resin strips prior to insertion into the linear
member of Figure 1 .
Figure 3 is a cross sectional view of keyed reinforcement depicted in Figure 1 after
attachment of the resin strips of Figure 1 and with insertion of a locator pin.
Figure 4 is a side view of the keyed reinforcement member depicted in Figure 1 of
the drawings.
Figure 5 is a cross section of a linear keyed reinforcement in another embodiment.
Figure 6 is a perspective view of a portion of a non-linear keyed reinforcement in
one aspect of the invention.
Figure 7 is a cross section along lines 7-7 of Figure 6 but with the resin strip
inserted into the channel.
Figure 8 is a plan view of the complete ring structure partially depicted in Figure 6.
DESCRIPTION
Referring now to Figures 1 through 4 of the drawings, multi-walled keyed member
20 is depicted as a linear extrusion having opposed walls 22, 24 and opposed walls 26, 28. Keyed member 20 serves not only to provide stiffness and strength to composite
structural reinforcement member 30 (Figure 3), but also as a mechanical ly interlocking
carrier for thermally expandable resin strips 32. Keyed member 20 may be formed of a
number of materials such as aluminum, light-weight steel and high-strength plastics. Most
preferably, keyed member 20 is an aluminum extrusion, but can also be done effectively
using injection molded, compression molded, blow molded, extruded, or rotational
molded plastic or stamped or roll formed steel as well as other forming methods known
to those skilled in the art of material use and forming. In this particular embodiment,
keyed member 20 has an internal partition or wall 34 which defines two chambers, 36
and 38. Partition 34 provides additional strength and rigidity to member 20.
In the embodiment of Figures 1-4 each wall of keyed member 20 is provided with
at least one channel 40 which is adapted to retain one resin strip 42. In more detail, and
referring now to Figure 1 of the drawings, wall 22 of keyed member 20 has channel 40
which will generally be coextensive along the entire length of keyed member 20. In this
particular embodiment channel 40 is provided with lips or flanges 44 which extend
partially over the opening or cavity of channel 40. As shown in Figure 3, resin strips 42
have a shape which mates with channels 40 to provide a mechanical interlock as shown
best in Figure 3 of the drawings. It is to be understood that the precise mating shapes or
geometries of the keyed member and the interlocking strip are not critical to the practice
of the invention. It is important, however, that the two (member 20 and strips 42) have
shapes which achieve the desired mechanical interlock, i.e. resin strips 42 are held in place by member 20 without the need for an adhesive bond or external additional locking
parts. Thus, in the example shown in Figures 2 and 3 of the drawings lower edges 46 of
resin strips 42 extend to engage lips 44 of channels 40. In Figure 4 of the drawings, the
linear nature of keyed member 20 and strip 42 are shown more clearly. It will be
appreciated that strips 42 (which will also preferably be extruded) can be easily slipped
into channels 40 for assembly of composite reinforcement structure 30 or may be formed
in place as will be more fully described herein.
In order to locate composite reinforcement 30 in a structure to be reinforced, such
as a motor vehicle body, and referring now to Figure 3 of the drawings locator pin 48 may
be provided. The nature of locator pins will be well known to those skilled in the art. In
addition, in the most preferred embodiment of the invention at least two walls of keyed
member 20 (in terms of area) are each at least 25% covered (this is total coverage and
coverage may be interrupted) by their respective resin strips.
Referring now to Figure 5 of the drawings in another embodiment composite
reinforcement 50 has keyed member 52 with a central web 54 that forms channels 56 in
which resin strips 58 are mechanically held in T-shaped locking configuration. This
illustrates the variable nature of the interlocking surfaces of the keyed member and the
resin strips; here, strip 58 has a convex surface 60 that is received in a concave depression
62. As in the previously described embodiment strips 64 are provided such that all sides
of keyed member 52 have an associated resin strip. Locator pin 66 is also shown. The construction of the present invention enables a number of different options for
installation in a hollow structural part of a motor vehicle. One possibility is to attach end
caps (not shown) to the reinforcing structure. These end caps may have an integral fastener
or be spring loaded to enable installation and positioning in a vehicle. Another option is
to form a part that has the near net shape of the structure that it is intended to reinforce
such that when installed into a hollow cavity it becomes trapped and is thereby positioned.
This would typically be a vehicle area that requires a reinforcement that is not linear and
involves laying a part into a partial cavity that is later capped with another piece of sheet
metal. An additional method of installation is to apply a pressure sensitive adhesive to
some surface of the composite reinforcing structure. Depending on goals of the
reinforcement, the pressure sensitive adhesive may or may not also have structural
characteristics following cure.
As stated above, in one embodiment of the invention composite keyed
reinforcement 30 is linear; that is, preferably its length is at least twice its width or height.
In another preferred embodiment, however, and referring now to Figures 6 through 8 of
the drawings, composite reinforcement 70 is in the nature of a ring or continuous wall
structure. Each face 72 has a channel 74 into which a resin strip 76 is disposed by
mechanical interlock as in the previously described embodiments. (In addition, as best
shown in Figure 7, in a preferred embodiment of the invention at least 50% by weight of
resin strip 76 resides outside of channel 74 although it is not necessary that any material
reside outside in some applications.) Accordingly, the structures of Figures 1 -5 would typically be used if increased bending resistance is required. If reinforcement for so-called
breathing or oil canning is required, circumferential material of figures 6 through may be
used.
Resin strips 42, 64 and 76 are thermally expandable. That is, upon the application
of heat they will expand, typically by a foaming reaction, and preferably to at least 50%
the volume of the unexpanded state, but more preferably twice (the unexpanded state
being depicted in the drawings). In a preferred embodiment, the resin used to form the
resin strips is an epoxy-based material.
Resin preferably forms from about 5% to about 75% by weight and more preferably
from about 1 5% to 65% by weight of the resin strip. Filler preferably forms from about 0%
to about 70% by weight and more preferably from about 20% to about 50% by weight of
the resin strip. Blowing agent preferably forms from about 0% to about 10% by weight
and more preferably from about 0.2% to 5% by weight of the resin strip. Curing agent
preferably forms from about 0% to about 10% by weight and more preferably from about
0.5% to 5% by weight of the resin strip. Accelerator preferably forms from about 0% to
about 10% by weight and more preferably from about 0.3% to 5% by weight of the resin
strip. One preferred formulation is set forth in Table I below. Ingredient % bv Weight
Epoxy Resin 15% to 65% Ethylene Copolymer 0% to 20% Blowing Agent 0.2% to 5% Curing Agent 0.5% to 5% Accelerator 0.3% to 5% Filler 20% to 50%
As stated, the heat expandable material is most preferably a heat-activated,
substantially epoxy-based material. However, other suitable materials may also be
suitable. These include polyolefin materials, copolymers and terpolymers with at least
one monomer type an alpha-olefin, phenol/formaldehyde materials, phenoxy materials,
polyurethane materials with a high glass transition and others. In general the desired
characteristics of this heat expandable material will be high stiffness, high strength, high
glass transition temperature, good corrosion resistance, ability to adhere to contaminated
metallic and polymer surfaces, fast cure upon activation, good handing characteristics, low
cured density, low cost, and long shelf life.
As stated, composite keyed reinforcement part 30 is most preferably intended to be
placed in a hollow vehicle cavity for the purpose of structural reinforcement. When the
vehicle is heated, the heat expandable material (structural foam) expands to contact the
surface of the hollow cavity that it is intended to reinforce. It is not necessary that the
space between the member and the inner surface of the hollow cavity or other surface being reinforced be fully filled with expanded heat expandable material for substantial
reinforcement to occur. If full filling is required, it is possible to space the distance
between pieces of uncured heat expandable material and/or adjust the quantity of heat
expandable material such that the heat expandable material knits together during the
expansion process.
A particular benefit of the present invention is that it permits large sections to be
reinforced with full confidence that the structural foam material will fully cure. Because
the material must be heated to cure, it is important that full cure occur to obtain optimum
properties. If very large sections are filled with structural foam alone, then the difficulty
of obtaining sufficient heat transfer through the material can be difficult. Use of a keyed
composite reinforcing member greatly increases the probability that full cure will occur.
This is possible both because it permits the possibility of using less heat activated foam and
the rigid reinforcement provides a heat transfer conduit to the inner surface of the heat
activated material. An additional benefit is that a reinforcement with less weight and lower
cost can be provided for certain design types. A further additional benefit is that it permits
the possibility of producing a part that is highly resistant to damage during transport owing
to the support that the keyed reinforcing member provides to the heat expandable material.
Keyed reinforcing member 20 can be produced in many different ways which
facilitates production of a keyed indentation that permits mechanical interlocking. It is
possible to make a keyed reinforcing member by aluminum extrusion, steel roll forming, pultruded polymer composites, extruded polymers, blow molded polymers, thermoformed
extruded polymers, and compression molded powder metals. Many other methods can
be envisioned as well. The type of reinforcement is dictated by desired part shape,
performance characteristics, and cost.
Composite reinforcing structure 30 may be constructed by dispensing heat activated
expandable material onto the keyed reinforcing member using an extruder, including an
extruder that is articulated by a robot. This process relies on the extruder being positioned
such that molten heat expandable material is dispensed into the keyed section of the keyed
reinforcement member. Upon cooling, the heat expandable material will stiffen and resist
deformation while being transported. Upon sufficient reheating (a temperature necessarily
higher than the temperature used to shape the heat expandable material), the heat
expandable material will be activated such that it will expand and cure in the hollow
vehicle cavity and thereby provide the desired reinforcement. A particularly preferred way
of dispensing material onto a keyed reinforcing member is to use a robot articulated
extruder to press the molten heat expandable material into the keyed sections. An
additional method is to insert injection mold this material onto the keyed reinforcing
structure. Another way of constructing this kind of reinforcement is to separately extrude
the heat expandable material into a shape that mimics the section of a keyed location and
then slide or snap the heat expandable material into the keyed section of a keyed
reinforcing member. A further additional way of making the composite construction is to press molten of deformable heat expandable material into the keyed section of the
reinforcing member.

Claims

CLAIMSWe claim:
1 . A reinforcement member for structurally reinforcing a hollow member, said
keyed reinforcement member comprising:
a member having a body, said body defining a channel for receiving a strip of
uncured thermally expandable resin therein, said body further defining a mechanical
interlocking means at said channel; and
an uncured thermally expandable resin strip disposed in said channel, said uncured
thermally expandable resin strip having a surface which is shaped to mate with said
channel such that said mechanical interlocking means mechanically retains said uncured
thermally expandable resin strip in said channel.
2. The reinforcement member recited in claim 1 , wherein said body, said
channel and said uncured thermally expandable resin strip are linear.
3. The reinforcement member recited in claim 1 , wherein said body, said
channel and said uncured thermally expandable resin strip are non-linear.
4. The reinforcement member recited in claim 1 , wherein said uncured
thermally expandable resin strip is epoxy-based.
5. The reinforcement member recited in claim 1 , further including at least one
locator means for locating said keyed reinforcement member in a hollow structure.
6. The reinforcement member recited in claim 5, wherein said locator means
is a post.
7. The reinforcement member recited in claim 1 , wherein said interlocking
means is a T-shaped slot.
8. A reinforcement member for structurally reinforcing a hollow member, said
keyed reinforcement member comprising:
a metallic or high-strength thermo-plastic member defining a channel for receiving
uncured thermally expandable epoxy-based resin therein, said metallic member further
defining a mechanical interlocking means at said channel; and
an uncured thermally expandable epoxy-based resin disposed in said channel, said
uncured thermally expandable epoxy-based resin having a surface which is shaped to mate
with said channel such that said mechanical interlocking means mechanically retains said
uncured thermally expandable epoxy-based resin in said channel.
9. The reinforcement member recited in claim 8, wherein said metallic member
is linear or contains curvature (non-linear).
10. The reinforcement member recited in claim 8, wherein said metallic member
is a ring.
1 1 . The reinforcement member recited in claim 8, further including at least one
locator means for locating said reinforcement member in a hollow structure.
12. The reinforcement member recited in claim 1 1 , wherein said locator means
is a post.
13. The reinforcement member recited in claim 8, wherein said interlocking
means is a T-shaped slot.
14. A reinforcement member for structurally reinforcing a hollow member, said
keyed reinforcement member comprising:
a member having a body, said body defining a channel for receiving a strip of
uncured thermally expandable resin therein, said body further defining a mechanical
interlocking means at said channel; and
an uncured thermally expandable resin strip disposed in said channel, said uncured
thermally expandable resin strip having a surface which is shaped to mate with said
channel such that said mechanical interlocking means mechanically retains said uncured
thermally expandable resin strip in said channel, said uncured thermally expandable resin
strip being retained in said channel solely by said mechanical interlocking means.
1 5. The reinforcement member recited in claim 14, wherein said body, said
channel and said uncured thermal ly expandable resin strip are linear.
16. The reinforcement member recited in claim 14, wherein said body, said
channel and said uncured thermally expandable resin strip are non-linear.
1 7. The reinforcement member recited in claim 14, wherein said uncured
thermally expandable resin strip is epoxy-based.
18. The reinforcement member recited in claim 14, further including at least one
locator means for locating said keyed reinforcement member in a hollow structure.
19. The reinforcement member recited in claim 18, wherein said locator means
is a post.
20. The reinforcement member recited in claim 14, wherein said interlocking
means is a T-shaped slot.
PCT/US2000/006803 1999-03-16 2000-03-16 Structural reinforcements WO2000055444A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU36283/00A AU3628300A (en) 1999-03-16 2000-03-16 Structural reinforcements
EP00914970A EP1208276B1 (en) 1999-03-16 2000-03-16 Structural reinforcements
DE60010900T DE60010900T2 (en) 1999-03-16 2000-03-16 REINFORCEMENT FOR STRUCTURES
AT00914970T ATE267311T1 (en) 1999-03-16 2000-03-16 REINFORCEMENTS FOR STRUCTURES

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/268,810 US6131897A (en) 1999-03-16 1999-03-16 Structural reinforcements
US09/268,810 1999-03-16

Publications (1)

Publication Number Publication Date
WO2000055444A1 true WO2000055444A1 (en) 2000-09-21

Family

ID=23024582

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/006803 WO2000055444A1 (en) 1999-03-16 2000-03-16 Structural reinforcements

Country Status (7)

Country Link
US (2) US6131897A (en)
EP (1) EP1208276B1 (en)
AT (1) ATE267311T1 (en)
AU (1) AU3628300A (en)
DE (1) DE60010900T2 (en)
ES (1) ES2216875T3 (en)
WO (1) WO2000055444A1 (en)

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EP1208276A4 (en) 2003-03-19
US6131897A (en) 2000-10-17
ATE267311T1 (en) 2004-06-15
DE60010900D1 (en) 2004-06-24
AU3628300A (en) 2000-10-04
US6311452B1 (en) 2001-11-06
DE60010900T2 (en) 2004-10-28
EP1208276B1 (en) 2004-05-19
ES2216875T3 (en) 2004-11-01

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