EP3591160A1 - Fensterrahmen, der zur verwendung als flügel oder als feststehender rahmen angepasst ist, und verfahren zur herstellung eines fensterrahmens - Google Patents

Fensterrahmen, der zur verwendung als flügel oder als feststehender rahmen angepasst ist, und verfahren zur herstellung eines fensterrahmens Download PDF

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Publication number
EP3591160A1
EP3591160A1 EP19184756.5A EP19184756A EP3591160A1 EP 3591160 A1 EP3591160 A1 EP 3591160A1 EP 19184756 A EP19184756 A EP 19184756A EP 3591160 A1 EP3591160 A1 EP 3591160A1
Authority
EP
European Patent Office
Prior art keywords
strengthening
frame
strengthening portion
members
sash
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP19184756.5A
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English (en)
French (fr)
Other versions
EP3591160B1 (de
Inventor
Matthias Dommert
Michael Meyer-Hansen
Vanessa Margaret Harding
Sverre Simonsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VKR Holding AS
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VKR Holding AS
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Filing date
Publication date
Application filed by VKR Holding AS filed Critical VKR Holding AS
Publication of EP3591160A1 publication Critical patent/EP3591160A1/de
Application granted granted Critical
Publication of EP3591160B1 publication Critical patent/EP3591160B1/de
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/30—Coverings, e.g. protecting against weather, for decorative purposes
    • E06B3/301—Coverings, e.g. protecting against weather, for decorative purposes consisting of prefabricated profiled members or glass
    • E06B3/306—Covering plastic frames with metal or plastic profiled members
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/04—Wing frames not characterised by the manner of movement
    • E06B3/06—Single frames
    • E06B3/08—Constructions depending on the use of specified materials
    • E06B3/20—Constructions depending on the use of specified materials of plastics
    • E06B3/205—Constructions depending on the use of specified materials of plastics moulded or extruded around a core
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/03—Sky-lights; Domes; Ventilating sky-lights
    • E04D13/035—Sky-lights; Domes; Ventilating sky-lights characterised by having movable parts
    • E04D13/0351—Sky-lights; Domes; Ventilating sky-lights characterised by having movable parts the parts pivoting about a fixed axis
    • E04D13/0354—Sky-lights; Domes; Ventilating sky-lights characterised by having movable parts the parts pivoting about a fixed axis the parts being flat

Definitions

  • the present invention relates to a window frame adapted for use as a sash or a stationary frame, said frame including a top frame member, a bottom frame member, and two side fame members, these frame members defining a frame plane and each of these frame members having a longitudinal direction extending in the frame plane, said frame comprising a strengthening portion and a moulded surface layer covering the strengthening portion wholly or partially and giving the frame desired surface properties, where at least one strengthening member of the strengthening portion includes a shell defining an outer surface of the strengthening member, and a plurality of strengthening ribs and/or flanges extending from the shell.
  • the invention further relates to a method for making such a frame.
  • this is achieved with a frame, where said at least one strengthening member of the strengthening portion includes a plurality of closed cells arranged in continuation of each other in the longitudinal direction, each cell being delimited by the shell and one or more strengthening ribs and/or flanges.
  • the cells provide the strengthening portion with an optimal balance between strength and low weight as the ribs and/or flanges forming the wall delimiting the cells extend into the space defined by the shell and hence provides flexural rigidity to the frame member.
  • the walls delimiting the cells may also extend from the shell on one side of the strengthening portion to the shell on the opposite of the strengthening portion, thereby increasing the compressive strength of the strengthening portion.
  • Ribs and/or flanges extending from the shell may be positioned along the length of the shell. In this way, the strength of the strengthening portion is increased in the longitudinal direction extending in the frame plane.
  • a lattice-like structure includes a lattice with shapes including circles, triangular, square, rhombus, pentagon, hexagon, although any suitable shape may be used. These can be formed from overlapping or interconnecting ribs/flanges.
  • a rectangular strengthening portion may be regarded as having a top member, a bottom member, and two side members corresponding to the top frame member, the bottom frame member, and the two side fame members of the frame even if made as one unitary portion.
  • Embodiments where separate strengthening members are interconnected are, however, presently considered advantageous as a strengthening portion may then for example be composed by combining top, bottom and side members having desired properties, including lengths, to suit the desired properties of the finished frame.
  • the strengthening portion may be made from any material which is not sensitive to water and which is preferably suitable for forming a lattice-like structure, including metals, but in order to reduce the formation of thermal bridges it is presently preferred that the strengthening portion is made primarily from a polymer.
  • Materials chosen from the group consisting of polypropylene, high density polyethylene, polyethylene terephthalate, polycarbonate, acryl-nitrile-butadiene-styrene, polyamide 6, polyamide 66, polyurethane, polyvinylchloride, chlorinated polyvinylchloride, and mixtures thereof are presently preferred.
  • Such suitable polymers generally have a density above 0.85 g/cm 3 .
  • Such suitable polymers are generally thermoplastics.
  • the strengthening portion may comprise a polymer with a fibre filler.
  • the filler may for example be glass fibre or a natural fibre, such as cellulose, which will provide high strength and relatively low weight.
  • the material should of course be chosen with a view to the compatibility with the material used for the surface layer. Recyclability can also be taken into account.
  • the strengthening portion may include several layers of material, several different materials, and/or be provided with a surface profiling.
  • the shell may be made from a different material than the ribs and/or flanges, or the shell may include an inner layer connected to the ribs and/or flange and an outer layer suited for contact with the material used for the surface layer.
  • the outer side of the shell may also be provided with a profiling adapted for optimizing the contact with the surface layer.
  • At least a part of at least one strengthening member is made by injection moulding or 3D printing.
  • the surface layer defines the shape of the frame. This means that the thickness of the surface layer may be different at different sections of the frame. As an example, the surface layer may form flanges or grooves configured for use in connecting a pane, sealing gaskets, screening devices etc. to the frame. As another example, the surface layer may be relatively thick at sections where items such as hinges and locking assemblies are to be attached to the frame. This is particularly advantageous if the strengthening portion is not well suited for receiving screws or like fasteners typically used for attaching such items.
  • the presence of the cells arranged in continuation of each other in the longitudinal direction contributes to the insulating properties of the strengthening portion and hence of the entire frame by preventing or reducing the convective heat transfer in the longitudinal direction, which may occur in extruded profiles having air spaces extending over the entire length of the profile.
  • insulating material may be provided in one or more closed cells in the strengthening portion and/or in spaces between strengthening ribs and/or flanges of least one strengthening member of the strengthening portion. If using such insulating material, it must be ensured that it does not influence negatively on the load-bearing capacity of the strengthening portion, or that it is included in the calculations when designing the strengthening portion. Alternatively, or as a supplement, insulating material may be provided on an outer side of the strengthening portion.
  • the insulating material is preferably chosen from the group consisting of expanded polypropylene, expanded polystyrene, polyurethane, expanded polyester, expanded poly-lactic acid, mineral wool, natural fibres, aerogel, air, vacuum, and mixtures thereof.
  • the strengthening portion or one or more strengthening members of the strengthening portion may be composed of two or more interconnected parts. Particularly it is envisaged that strengthening members made from two half-shells each extending in the length direction of the strengthening member will be advantageous. It is also envisaged that the strengthening ribs and/or flanges may be provided as a separate part, which is sandwiched be-tween two or more shell parts for the construction of a strengthening member or the strengthening portion.
  • Strengthening members and/or parts thereof may be interconnected solely by the moulding material used for the surface layer, but may also be provided with connectors as will described in more detail later.
  • the strengthening portion may include one or more reinforcement sections adapted for the attachment of an item transmitting force to or from the frame, such as a hinge, a locking assembly, or an actuator.
  • Such reinforcement sections may for example be sections when the strengthening ribs and/or flanges are particularly strong, where there are more strengthening ribs and/or flanges.
  • a reinforcement section may also be achieved by the use of a stronger material or by including reinforcement in the strengthening portion.
  • Reinforcement may be in the form of inlays of for example metal or glass fibre, but it is also possible to provide the strengthening portion with increased flexural resistance by the addition of a material chosen from the group consisting of wood, cellulose or other natural fibres, glass fibres, talcum, CaCO3, carbon fibres, graphite, nanofiber, and combinations thereof. The content of such materials may vary over the length, width, and/height of a strengthening member.
  • the strengthening portion comprises a polymer comprising glass fibres.
  • the strengthening portion comprises a polymer comprising wood fibres.
  • the frame may further include hinges, brackets or like fittings adapted for connecting the frame directly or indirectly to a load bearing construction of a building.
  • Such fittings may be embedded in the surface layer or attached to it and should preferably be connected to the frame in a manner allowing a direct transmission of forces to/from the strengthening portion, for example by screws or like fasteners used for the attachment penetrating into the strengthening portion.
  • the surface layer may comprise a polymer suitable for use with reaction injection moulding, such as polyurethane.
  • the surface layer may further comprise an outer layer which provides a surface finish. This may take the form of a coating or paint, UV resistance layer, flame inhibiting layer, foil or other similar part.
  • a window can be provided comprising a stationary frame and a sash, with at least one of the stationary frame or sash comprising a window frame adapted for use as a sash or a stationary frame according to the first aspect of the present invention.
  • the stationary frame and sash are connected by hinges and secured by at least one locking assembly
  • the sash comprises at least one gasket and an insulated glazing
  • the stationary frame preferably comprises brackets adapted for connecting it directly or indirectly to a load bearing construction of a building.
  • the window benefits from the weight and strength characteristics of the frame incorporated therein.
  • a method for making a window frame for a sash or a stationary frame comprising said frame including a top frame member, a bottom frame member, and two side fame members, these frame members defining a frame plane and each of these frame members having a longitudinal direction extending in the frame plane, said method including:
  • the strengthening ribs and/or flanges together with the shell provide a light load-bearing structure with cells which the moulding material used for the surface layer is prevented from entering.
  • the result is a frame, which combines the strength and stability of a wood-based strengthening portion with the durability, uniformity and homogeneity of a polymer-based strengthening portion.
  • the surface layer may be applied in several ways including spraying or printing, but is it presently preferred that the surface layer is moulded onto the strengthening portion.
  • the strengthening portion is preferably arranged in a mould, which is then filled with the moulding material used for the formation of the surface layer, said moulding material possibly being introduced under pressure in order to establish a good contact between the moulding material and the strengthening portion. If the strengthening portion is made from separate strengthening members, these may be arranged in the mould in a separate state and interconnected solely by the moulding material, but it is presently preferred to also interconnect them by other means, either before or after applying the surface layer.
  • the surface layer is made from polyurethane (PUR), but materials chosen from the group consisting of polypropylene, acryl-nitrile-styrene-acrylate, styrene-acryl-nitrile, polycarbonate, polyethylene, poly-butylene-terephthalate, other plastics, aluminium, other metals, rubber, natural fibres and combinations thereof are also possible.
  • PUR polyurethane
  • the surface layer can be made by reaction injection moulding (RIM) using a thermosetting polymer, such as polyurethane.
  • At least two strengthening parts are interconnected thereby forming a strengthening member of the strengthening portion or the entire strengthening portion may be made by interconnecting two or more strengthening parts.
  • these strengthening parts are preferably interconnected by welding, gluing, and/or snap-locking.
  • Welding will usually provide an interconnection which is sufficiently tight to prevent a moulding material used for creating the surface layer from penetrating between the strengthening parts and into the cells of the strengthening member or strengthening portion.
  • Snap-locking provides a faster and easier interconnection, and can also provide the required degree of sealing.
  • the strengthening portion, separate strengthening members, or parts of strengthening members may be made by any suitable process, but injection moulding, exjection®, foamed injection, blow moulding, 3D printing, lamination, vacuum forming, deep drawing, or combinations thereof are presently preferred.
  • 3D printing allows the formation of very complex structures including closed cells without the need for interconnecting parts.
  • injection moulding of interconnectable parts is considered advantageous, particularly for industrial scale.
  • moulding for example injection moulding, allows embedding fibres in the material with random orientation for increased stiffness and strength in multiple directions.
  • insulating material may be provided as described with reference to the first aspect of the invention.
  • the insulating material may be blown into or moulded in the strengthening portion.
  • materials, which are suitable for blowing are beads of expanded polystyrene and organic fibres.
  • An example of a material suitable for moulding is foamed polyurethane, which can be introduced in liquid form and turn into foam once in the strengthening portion as a result of a chemical reaction.
  • the frame When the surface layer has been applied the frame may be provided with an insulating pane element and/or one or more fittings, such as hinges or mounting brackets, adapted for connecting the frame directly or indirectly to a load bearing construction of a building.
  • fittings such as hinges or mounting brackets
  • a frame 1 for use as a stationary frame for a centre-hung roof window is shown in Fig. 1 .
  • the frame includes a top frame member 11, a bottom frame member 12, and two side fame members 13,14.
  • Each of these frame members has a longitudinal direction L (shown only at the top and right side) and together they define a frame plane P (indicated in the lower left corner).
  • An inner opening 15 of the frame is delimited by the frame members.
  • the frame is composed of a strengthening portion, which has been over-moulded with a surface layer 16 which gives the frame desired surface properties by defining its outer shape.
  • the surface layer is made from polyurethane, thus also making the frame waterproof and providing good thermal insulation properties.
  • Other materials may provide other properties and may need surface treatment for waterproofing, such as paint.
  • the surface layer 16 encompasses the presence of a surface finish by a coating (not shown).
  • Other layers such as paint, UV resistance layer, flame inhibiting layer, foil or other similar surface additions may be used.
  • the surface layer 16 covers the strengthening portion entirely, but it is also possible to leave smaller sections of strengthening portion uncovered, for example to facilitate the insertion of screws, installation brackets, actuators, springs, pins or other fasteners, which need to be connected to the strengthening portion, or to allow filling the strengthening portion with insulation or for ventilation of the strengthening portion.
  • Strengthening members 31 and 33 used for the formation of the strengthening portion within the frame 1 are shown along the top frame member 11 and left side frame member 13, respectively, in Fig. 1 . These strengthening members are adapted for being interconnected with two similar members (not shown) at the right side and at the bottom, respectively, by being provided with connectors 4.
  • the top strengthening member 31 is provided with projections 41 adapted for being inserted in openings 43 in the side strengthening members 33.
  • the engagement between these openings and the projections may be stabilized for example by a tight fit, by snap-locking or press fitting, by fasteners being inserted into both parts, or by gluing or welding. It is, however, also possible that they are just fitting loosely and that a stable connection is achieved by the moulding material used for the surface layer flowing in between them and fixing them in relation to each other.
  • all strengthening members are provided with openings and separate corner brackets are used for interconnecting them.
  • a reinforcement section 5 which is positioned where locking assemblies and hinges (not shown) will be secured to the finished frame 1.
  • the bigger cross-section and additional material at these sections allow the strengthening portion to better take up forces transmitted from the locking assemblies and hinges. It is also possible to include parts consisting wholly or partially of different material, such as metal or glass fibre, in the strengthening portion at the reinforcement sections 5.
  • Separate reinforcement members are preferably made from a material chosen from the group consisting of steel, aluminium, pultruded profile, wood, natural fibres, carbon fibres, glass fibre tape, plastic or combinations thereof.
  • Openings 61 in the reinforcement sections are intended for receiving mounting pins or other fasteners used for attachment of the locking assemblies, hinges, etc. These openings may be filled partially by the material used for the surface layer in order to ensure a continuous surface on the frame.
  • openings 62 are provided for receiving other fasteners used, for example for attachment of covering and cladding members, and similar openings on a sash may be used for attachment of an insulated glass unit.
  • Still further openings 63 are provided in order to give the individual strengthening member 31, 33 and consequently the resulting strengthening portion the desired strength and stiffness.
  • some of these openings may be filled wholly or partially with the moulding material used, while others are kept open such that at least one closed cell is formed in the interior of the strengthening member.
  • the straight sections 64 of the strengthening members 31, 33 extending in the longitudinal direction in Fig. 1 is thus a shell defining an outer surface of the strengthening member and the inclined sections 65 and pillar sections 66 extending perpendicular to the longitudinal direction L constitutes a plurality of strengthening ribs and/or flanges extending from the shell in order to provide extra strength and stiffness.
  • the inclined sections 65 and pillar sections 66 could also be made hollow in which case closed cells would be formed in their interior.
  • Fig. 2 shows another embodiment of the invention, namely a frame 2 for use as a sash for a centre-hung roof window and a strengthening portion 3 for use as a core therein.
  • the sash 2 includes a top sash member 21, a bottom sash member 22 and two sides sash members 23, 24 delimiting a sash opening 25, and the strengthening portion includes corresponding members, i.e. a top strengthening member 31, a bottom strengthening member 32, and two side strengthening members 33,34.
  • the strengthening members 31,32,33,34 here form part of an integral strengthening portion and are thus not separate interconnected members as described with reference to Fig. 1 .
  • Figs 3-5 show more details of the strengthening portion and sash shown in Fig. 2 .
  • the strengthening portion 3 is shown in an exploded view and it is seen that it is composed of two parts, an upper half-shell 35 and a lower half-shell 36. These half-shells are intended for production by injection moulding, but may of course be produced in other ways, 3D-printing being considered as promising technology. Though not shown this embodiment, they too may be supplemented with separate reinforcement members as described above.
  • Each of the half-shells 35,36 include a plurality of ribs and flanges 72, and when the half-shells are interconnected, these ribs and flanges delimit a plurality of closed cells 71 within the strengthening portion as is also seen from the cross-section along the frame plane shown in Fig. 6 .
  • the two half-shells 35,36 are interconnected solely by friction or snap-locking before being over-moulded with the surface layer as this will make the manufacturing process easy and quick, but it is also possible to interconnect them by other means.
  • welding including laser welding, ultrasonic welding, and heat welding, is preferred if needing to apply alternative interconnecting means, but glues, adhesives and mechanical fasteners may also be employed.
  • glues, adhesives and mechanical fasteners may also be employed.
  • Sealing and gaskets may be used for this purpose.
  • the air captured in the closed cells 63, 71 provides the finished frame with excellent insulating properties, but is also possible to provide insulating material or a vacuum within some or all of these closed cells.
  • Insulating material may be made by expansion in a mould, expansion in the strengthening portion, expansion and extrusion, foaming, vacuum forming, milling, 3D printing, casting, blowing, suction, or combinations thereof.
  • the cells 63, 71 further ensure that the weight of the strengthening portion is low compared to a traditional wooden strengthening portion.
  • the size, shape, and position of the ribs, flanges, and cells may vary depending on demands for strength and stiffness and the material(s) used.
  • FIG. 7 A third embodiment of a strengthening portion 3 is shown in Figs 7 and 8 .
  • This strengthening portion is adapted for use in the frame or sash of a sky-light.
  • This strengthening portion too includes closed cells in the interior (not shown).
  • the cells are delimited by ribs which extend from one side of the shell forming the outer surface of each strengthening member 31,32,33,34 to the other and flanges 73 are provided on the outer side of the strengthening portion opposite each of these ribs.
  • the frame is composed of four separate strengthening members 31,32,33,33 which are interconnected by snap-locking connectors 4.
  • Each strengthening member includes an integral corner section 37, which extends in the frame plane and perpendicular to the longitudinal direction L so that in the assembled state it extends in parallel with the longitudinal direction of another strengthening member. This ensures that there are no interconnections at the corners, which are often subject to relatively high loads.
  • the length of the corner section may vary depending on the expected loads on the frame in which the strengthening portion is to be used.
  • Fig. 9 shows an embodiment corresponding substantially to that shown in Figs. 2-5 , but as may be best seen by comparing to Fig. 3 , it includes a separate top strengthening member 38 in addition to the two half shells.
  • This separate top strengthening member 38 is made from a stronger material than the two half-shells in order to provide additional strength where the locking assembly (not shown) is to be attached.
  • the strengthening portion 3 is assembled, the separate top strengthening member 38 is sandwiched between the half-shell and eventually fixated in this position by the surface layer.
  • a separate strengthening member 38 may be provided in the side or bottom members.
  • FIG. 10 A still further embodiment of a strengthening portion 3 consisting of eight separate strengthening members is shown in Fig. 10 .
  • This embodiment combines the advantages of using separate members with the advantages of using half-shells by each strengthening member being composed of two half-shells.
  • the top strengthening member is composed of an upper part 31 a and a lower part 38 corresponding to the separate member 38 shown in Fig. 9
  • the bottom strengthening member is composed of an upper part 32a and a lower part 32b
  • the side strengthening members are composed of upper parts 33a,34a and lower parts 33b,34b.
  • This embodiment too includes closed cells 71 defined by ribs and flanges on the upper and lower parts coming together when parts are assembled.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Wing Frames And Configurations (AREA)
EP19184756.5A 2018-07-06 2019-07-05 Fensterrahmen, der zur verwendung als flügel oder als feststehender rahmen angepasst ist, und verfahren zur herstellung eines fensterrahmens Active EP3591160B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DKPA201870471 2018-07-06

Publications (2)

Publication Number Publication Date
EP3591160A1 true EP3591160A1 (de) 2020-01-08
EP3591160B1 EP3591160B1 (de) 2022-06-22

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EP19184756.5A Active EP3591160B1 (de) 2018-07-06 2019-07-05 Fensterrahmen, der zur verwendung als flügel oder als feststehender rahmen angepasst ist, und verfahren zur herstellung eines fensterrahmens

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3828360A1 (de) * 2019-11-29 2021-06-02 VKR Holding A/S Fensterinstallationssystem und verfahren zur installation eines dachfensters

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2702156A1 (de) * 1977-01-20 1978-07-27 Walter Mergler Blend- und fluegelrahmen fuer fenster bestehend aus einzelnen rahmenteilen
US4341831A (en) * 1981-05-04 1982-07-27 Fulgeritwerke Seelze Und Eichriede In Luthe Bei Hannover Adolf Oesterheld Gmbh & Co. Kommanditgesellschaft Shapes for windows or doors
US5634306A (en) * 1991-11-06 1997-06-03 Riegelman; Harry M. Composite framing member construction for windows and doors
US20090094929A1 (en) 2004-08-02 2009-04-16 Carlson Barry L Reinforced structural member and frame structures
EP2167770A1 (de) 2007-05-18 2010-03-31 VKR Holding A/S Rahmenstruktur und verfahren zur herstellung solch einer rahmenstruktur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EE200200004A (et) * 1999-07-15 2003-02-17 Sch�Co International Kg Sissepaigutatud tugevduselementidega plastmassistõõnesprofiil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2702156A1 (de) * 1977-01-20 1978-07-27 Walter Mergler Blend- und fluegelrahmen fuer fenster bestehend aus einzelnen rahmenteilen
US4341831A (en) * 1981-05-04 1982-07-27 Fulgeritwerke Seelze Und Eichriede In Luthe Bei Hannover Adolf Oesterheld Gmbh & Co. Kommanditgesellschaft Shapes for windows or doors
US5634306A (en) * 1991-11-06 1997-06-03 Riegelman; Harry M. Composite framing member construction for windows and doors
US20090094929A1 (en) 2004-08-02 2009-04-16 Carlson Barry L Reinforced structural member and frame structures
EP2167770A1 (de) 2007-05-18 2010-03-31 VKR Holding A/S Rahmenstruktur und verfahren zur herstellung solch einer rahmenstruktur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3828360A1 (de) * 2019-11-29 2021-06-02 VKR Holding A/S Fensterinstallationssystem und verfahren zur installation eines dachfensters

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Publication number Publication date
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