GB2027397A - Insulating bodies for caravans or commercial vehicles - Google Patents

Insulating bodies for caravans or commercial vehicles Download PDF

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Publication number
GB2027397A
GB2027397A GB7920083A GB7920083A GB2027397A GB 2027397 A GB2027397 A GB 2027397A GB 7920083 A GB7920083 A GB 7920083A GB 7920083 A GB7920083 A GB 7920083A GB 2027397 A GB2027397 A GB 2027397A
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United Kingdom
Prior art keywords
carrying
housing
wall elements
elements
insulating
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Granted
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GB7920083A
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GB2027397B (en
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WOHN ART FREIZEITARTIKEL
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WOHN ART FREIZEITARTIKEL
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Publication of GB2027397A publication Critical patent/GB2027397A/en
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Publication of GB2027397B publication Critical patent/GB2027397B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D33/00Superstructures for load-carrying vehicles
    • B62D33/04Enclosed load compartments ; Frameworks for movable panels, tarpaulins or side curtains
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D27/00Connections between superstructure or understructure sub-units
    • B62D27/02Connections between superstructure or understructure sub-units rigid
    • B62D27/026Connections by glue bonding
    • 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
    • B62D29/04Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
    • B62D29/043Superstructures
    • B62D29/045Van bodies composed of substantially rectangular panels

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Body Structure For Vehicles (AREA)
  • Laminated Bodies (AREA)
  • Connection Of Plates (AREA)
  • Building Environments (AREA)
  • Finishing Walls (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The body is made up of wall elements 3, 4 comprising insulating elements 6 situated between an outer and an inner carrying plate 2, 7. At least one of the carrying plates 2 bridges the area of transition 8 between adjacent wall elements 3, 4 and/or between differing cross- sectional shapes of the body 1. The various components may be of plastics material and the corners of the body may be completed by the use of foam plastics 11. <IMAGE>

Description

SPECIFICATION Housing, in particular vehicle bodywork The present invention relates to housings having a hollow section nature which are for use with vehicles.
Housings have already been disclosed for application to vehicle superstructures. Thus German OS 15 30 934 discloses separate wall elements or housing wall parts which may be assembled into a one-piece structural component by means of specially shaped transition pieces.
Comparitively numerous seam emplacements are formed in the external skin of a housing of this nature by this special building-set-like assembling of the individual wall elements or housing wall parts, and the cost for production of a housing of this kind is also correspondingly high.
Furthermore, this method of constructing housings requires a plurality of individual components to be stocked so that housings having large external dimensions and structuredependent complex shapes may also be produced.
Furthermore, heat conduction bridges and leakage points commonly occur in the area of the transition points between the individual wall elements and the transition pieces between the individual wall elements or housing wall elements which in numerous cases do not allow of an application of this building-set system for the production of vehicle superstructures.
it has however already been attempted to reduce the difficulties regarding the insulation or rather connection of such individual wall elements or housing wall elements, by insertion of sealing compositions in the area of the seam emplacements between the separate wall elements or housing wall elements after assembling the latter, for sealing or insulating these seam emplacements. In the case of known housing - according to German OS 14 79 811 or German AS 16 09 612 - cavities are left free in the area of the seam emplacements between the separate wall elements or housing members upon assembling these, into which sealing compositions or plastics material foams are introduced after joining the individual wall elements. These however primarily serve the purpose of improving insulation and sealing of the seam emplacements between the separate wall elements or housing wall parts.
Housings for lighting domes, lanterns and the like, have already been disclosed moreover German OS 24 50 644 - wherein the individual wall elements or housing wall parts assembled into a one-piece structural component are joined together in form-locked manner by means of an interstice-filling formed by an expanded material.This method of connection requires a comparatively large number of separate components of different construction, so that the required housings may thereupon be assembled from the individual parts by application of the interstice-fillers comprised of expanded plastics materials.
The present invention has as an object a housing of which in conjunction with economical production is intended to have a high load bearing or carrying capacity as well as improved insulation. Furthermore it is intended to cope with a minimum number of individual parts even during production of structure-dependent complex outer shapes, and the housing is also intended to resist strongly forces acting on said housing from the outside.
Accordingly the present invention consists in a housing for a vehicle having a hollow crosssectional shape and comprising wall elements of plastics material sandwich elements comprising insulating or supporting elements situated between an external and an internal carrying plate, and wherein in that at least one of the carrying plates is arranged to bridge the area of transition between adjacent wail elements and/or between varying or differing cross-sectional shapes of the housing, the housing being formed by at least one plastics material sandwich component assembled from several wall elements.
Thus at least one of the supporting panels. may be arranged to overlap the transitional area between adjacent wall elements and/or varying or differing cross-sectional shapes of the housing, the housing being formed by at least one structural component assembled from several wall elements and comprising a plastics material sandwich. The unexpected advantage of this structure consists in that the number of the seam emplacements between the different wall elements may be reduced and the load-carrying capacity of the inventively constructed housing may be increased at the same time by positioning the supporting panel in such manner as to overlap an area of transition between adjacent wall elements or varying cross-sectional shapes.A particularly advantageous division or distribution of forces is established throughout the area of transition thanks to this area of transition being overlapped by the supporting panel. At the same time, thanks to the supporting panel which is uninterrupted in this area, the section modulus of the housing is increased in this area, above all when two housing members having different cross-sectional shapes abut on each other. This renders it possible henceforth to construct housings to a design lacking a carrying frame, since it is now possibe to reduce the very highly stressed and unfavourably loaded corner joints in the case of parallelepipedal or cubical cabs. The hermeticity and the insulating qualities of the housing may thereby be improved at the same time.
In accordance with another preferred inventive feature of the invention, that the wall elements may be joined together in force-locked and formlocked manner by means of a supporting element insertible and in particular expansible between them. This solution provides the advantage-that these housings may bear or rather withstand high stresses because of the one-piece inherently selfsupporting form of construction. Furthermore, it is advantageous upon producing housings in accordance with the invention, that there is no need to have any regard to the forming of tapering wall contours - such as required for shaping purposes in the case of structural elements which are produced whole in moulds.
Another very substantial advantage now also consists in that the structure of the load-carrying external housing skin may largely be assembled under application of prefabricated or complementarily purchased plane-area wall elements, and that no more than the production of the load-bearing transition member, namely of the carrying members produced by expansion in situ in particular, need be performed in the required angular position of the wall elements. The space required during the production of housings of this kind may thereby also be kept very small.Since the plane-area wall elements make up by far the greater proportion of most housings, in particular in vehicle structures, and these are evidently much more economical in case of continuous production in particular, and since the investment required for moulding elements for the production of the connecting carrying elements which may simultaneously also be co-opted for shaping the housing, the overall cost of the housing is reduced considerably.
In accordance with another feature of the invention, the wall elements may be formed by insulating and/or supporting elements situated on a common carrying plate, joined to the latter in force-locked and form-locked manner and if appropriately equipped with a bracing or supporting plate at one side, and are connected into a one-piece housing via supporting elements which are jointed to the carrying plates and the wall elements in force-locked and form-locked manner by a gluing and in particular expanding operation.Areas of different degrees of consolidation are established on the carrying plate by means of the wall and insulating and or supporting elements which may be installed on a plane carrying plate, so that it is possible by simple displacement with respect to each other of the carrying plate sections strengthened by application of the insulating and or supporting elements, these may be deformed with application of comparatively little force in the weaker nonreinforced sections, a continuous self-supporting external skin of great strength also being produced in the areas between the wall elements, and a one-piece housing being produced with little expenditure on labour for assembling. Very large and unwieldy bodywork presses utilised for production of external housing elements may therefore be omitted in numerous cases.At the same time, this allows of the application of a substantially uninterrupted-external skin for housings having different dimensions and appearance, whereby it is possible to secure substantial economies under simultaneous increase in the strength of housings of this nature, especially in the production of vehicle bodies or mobile homes and the like.
In accordance with another feature of the invention it may be especially advantageous for the wall elements to be formed by prefabricated and in particular plane-area carrying and supporting plates of a sandwich element interconnected via a load-bearing insulating and or supporting element.
and to be joined together into an one-piece housing in force-locked and form-locked manner via the carrying member consisting of expanded plastics material. This method of producing housings under application of the carrying members which may in particular be expanded in situ in accordance with the invention, is primarily advisable in cases in which piane-area wall elements predominate. The plane-area panels produced on a large scale by continuous processes may concommitently be interconected into housings of a great variety of forms with little expenditure on individual moulds and expansible plastics material. Another advantage of the construction of these housings in accordance with these inventive features consists in that the prefabricated and in particular plane area wall elements need not be inserted wholly into a matching mould during production of the carrying member.The cost of mouldings for production of housing having different external dimensions is thereby reduced considerably.
In accordance with a still further feature of the invention, the carrying member or members may be expanded in situ after installing the wall elements on the common carrying plate and a deformation of this carrying plate corresponding to the desirable angular configuration of the wall elements, between the wall elements of the carrying plate which wall elements may if applicable be immobilised in their final position by abutment elements, and the abutment elements which are produced as seais in particular. Upon appropriately shaping the marginal areas of the wall elements or under application of abutment elements produced as seals, the cavity between the mutally confronting wall element end sides and the carrying plate may be utilised as a mould for producing the carrying member in one operation and be filled with expansible material.
Additional expense on moulds may be eliminated thereby.
In accordance with yet another feature of the invention, the carrying member may be formed by an expanded plastics material core which may be expanded in situ between the wail elements which may be clamped in the mould for the production of the carrying member, and foils applicable on the wall surfaces of the mould. This special embodiment of the carrying member now also offers access to the possibility of producing surfaces of substantially identical material without the application of uninterrupted carrying plates for the inner or outer sides.
In accordance with another and especially preferred embodiment of the invention, the carrying member may be formed by an expanded plastics material core which may be expanded either in a carrying unit in the form of a section which is cavity-like and comprises receiving rebates, folds or the like for the wall elements, the carrying unit being endowed with openings connecting the cavities with the wall elements.
The insertion of expanded plastics material into such labyrinth-like carrying units or sections closed off by a dense outer skin also eliminates the expense on a mould for production of these carrying members, apart from producing an intimate and form-locked as well as forcetransmitting working joint between the wall elements.
In accordance with another feature of the invention, the carrying member may be formed by an expanded plastics material core which is connectible in force-locked and form-locked manner to the end sides of housing members, the expanded plastics material core preferably being expansible between parts of the carrying or supporting plate projecting in opposed and equal manner beyond the end sides of the housing members. It is possible thereby to produce housings having considerable lengths in the direction of the longitudinal axis of the cylindrical or parallelpipedal housing members. In this connection, it is advantageous for the reception rebates or folds of the carrying units to be formed to receive the housing member end sides and to be situated in substantially identical or approximately parallel planes.
According to another feature, the supporting plates of a plane-area plastics material sandwich element may be arranged to be deformable in differential manner across their surface area to form different cross-sections or cross-sectional shapes of the housing, the deformation areas of the one carrying plate having arranged in them the other carrying plate as well as the insulating or supporting elements with mutual spacing, or parts of this other carrying plate and of the insulating or supporting element being spaceable in the said areas.This solution now renders it possible to exploit the advantages accruing upon assembling housings under application of uninterrupted carrying plates to the full even if the wall elements of the housing or the housing wall parts have equal or unequal opposed curvatures or if the cross-sectional shape of the housing changes along the extension of these wall elements or housing wall parts. As a matter of fact, it is also assured when a horizontal wall element is interrupted by a horizontal wall element to vary its cross-sectional shape, that one of the two carrying plates overlaps this area of transition in each case, whereby the resistance qualities of the housing may be improved.
In accordance with yet another embodiment of the invention, the carrying plate may be situated on the inner side of the curvature in the area of deformation in the longitudinal direction of curvature of parts having an equal or unequal and opposed curvature, in particular of the cab floor of vehicle bodies for small commercial vehicles, as well as the insulating or supporting element in the area of deformation of the carrying plate situated on the outer side of the curvature, are arranged in mutually spaceable or spaced manner. The already very high section modulus of such structural members, caused by application of the uninterupted carrying plate, is increased even more by the remanent deformation of the carrying plate situated on the outer side of the curvature.
In accordance with yet another embodiment of the invention,the insulating or supporting elements and or the carrying plates installed at the outer curvature side may be connectible in forcelocked and or form-locked manner via carrying members, the carrying members preferably being insertible in the cavity remaining between the carrying plates and the insulating or supporting elements. Establishing a force-locked and or formlocked joint between the carrying plates or carrying plate elements positioned opposite to the uninterrupted carrying plate, now also provides the possibility of retaining the sandwich structure comprising two externally situated covering and force-transmitting plates in the area of transition, so that it is possible to obtain a homogeneous structure from components with corner joints of this kind.
Within the scope of the invention, it is possible moreover for the carving members in the form of shaped elements extending in the longitudinal direction of curvature, and consisting of aluminium in particular, to be connectible in forcelocked and or form-locked manner to mutually angularly extending centering or abutment elements or surfaces for the insulating or supporting elements and or carrying plates. In this embodiment, the carrying members may then be co-opted at the same time for positioning the insulating or supporting elements or the carrying plates during the deforming operation on the uninterrupted carrying plate between two wall elements.Apart frdm the forces extending in the longitudinal direction of curvature, the carrying member may at the same time also receive and transmit the lateral and perpendicular forces of mutually angularly extending wall element so that components constructed in this manner have a greater torsionsal rigidity.
Within the scope of the invention, it is particularly advantageous moreover for the carrying member to be equipped with anchoring parts projecting into the cavity between the carrying plates and the insulating or supporting elements, said anchoring parts preferably being directed transversely to the longitudinal curvature direction and for example being formed in areal or rod-like manner. Under simultaneous application of a carrying member formed by a plastics material foam for filling said cavity, this form of embodiment promotes an uniform distribution of tensile stresses acting on part areas of the wall elements or housing wall parts throughout the length of the carrying members.
It is possible moreover in this connection for the carrying member which in particular is formed uninterruptedly in the longitudinal direction of curvature, to be positioned to cover the areas of transition between different cross-sections or cross-sectional shapes and or housing members or structural members, and to be constructed to bear load in its longitudinal direction. In the case of housings assembled from wall elements or housing wall parts, the stresses extending transversely to the longitudinal direction and acting on this housing, for example such as bending stresses, may be borne via these carrying members acting as "stays". The strain of the housing is thereby reduced in the area of transitior between different wall elements or housing wall parts.
Finally, it is also possible within the scope of the invention for the centring or abutment elements or surfaces of the carrying members to be joined to the wall elements or housing wall parts by means of a layer of adhesive or of mechanical connecting devices. This connecting.possibilty, as an improvement of the friction-locked joint between these parts or surfaces with the wall elements or housing parts, established the possibility of a predeterminable force distribution or transmission between the carrying members and the wall elements or housing wall parts.
The present invention also covers a process for production of housings, in particular vehicle bodywork, wherein at least two wall elements constructed composite manner are joined together in form-locked manner. This process is characterised in that a carrying plate in plane-area form in particular, whereof the dimensions preferably correspond to the surface area of the housing which is to be produced, and insulating and or supporting elements corresponding in their dimensions to the plane-area wall elements, are joined together in force-locked and form-locked manner after application of an adhesive coating on the carrying plate under vacuum in particular, whereupon the insulating and or supporting elements installed on the carrying plate are placed in the required angular position with respect to each other by a deformation of the carrying plate, and that the cavity between the carrying plate and the insulating and or supporting elements, which may if appropriate be delimited by a shaped element placed in position in the area of the supporting plates, is thereupon filled with expanded plastics material to form the carrying member and an one-piece housing or housing member. Housings which are produced by this process are characterised by a homogenous and uniterrupted outer skin surface, which thus creates ideal conditions against enviromental influences, like corrosion and the like.
In accordance with a feature of the invention, the housings may also be produced by a process, according to which at least two prefabricated and in particular plane-area wall elements comprising a sandwich element formed by a carrying and supporting plate connected via a load-bearing insulating and or supporting element, have their longitudinal end sides which are to be joined to each other clamped in a mould matching the external shape of the carrying member which is to be produced, and the expanded plastics material is thereupon infed into the cavity between these longitudinal end sides for the production of the carrying member. This process is characterised in that comparatively few separate components are required even in the case of large housings. The space required for production of the housings is consequently smaller and the semifinished parts may be handled more easliy.
Finally, it is also possible however for the mould or rather the cavity receiving the plastics material foam for production of the carrying member, to be heatable by means of a heating bar for example, the strength characteristics or the carrying members thereby being adaptable to the strength characteristics or load-carrying capacity of the other individual components of the housing.
In order that the present invention may be more readily understood, various embodiments of housings constructed in accordance therewith will now be described by way of example and with reference to the accompanying drawings, in which: Figure 1 is a perspective view of a plane-area carrying plate of one embodiment of housing according to the present invention, comprising insulating and or supporting elements placed thereon and unobstructed intermediate plate surfaces for insertion of carrying members, Figure 2 is an end view of the housing after deformation of the carrying plate shown in Figure 1, comprising the carrying members expanded between insulating and or supporting elements, Figure 3 is an end view of another housing comprising wall elements jointed together by and clamped in the moulds for production of the carrying member, Figure 4 is a partially cross-sectioned end view of modified embodiment of a housing according to the present invention in which plane-area wall elements are jointed via a carrying unit of hollow section type, and wherein the carrying member is expanded.
Figure 5 is a cross-section through two housing members which may be joined into a housing, comprising a carrying member, in side view, Figure 6 is a perspective view of the plane-area carrying plates and the insulating or supporting elements arranged between these in the areas of deformation with mutual spacing for production of an inventive housing, Figure 7 is an end view of a housing element after the deformation of the carrying plates shown in figure 6, and shows the different possibilities of locating the carrying member situated between the wall elements.
Figure 8 is a view of two housing elements connected into a common housing in accordace with the arrows VIll-VIll of Figure 7, Figure 9 is a side view of a small commercial vehicle with an embodiment of a housing according to the present invention arranged thereon, Figure 10 is a graphic view of a part of a carrying member insertible between the wall and supporting elements and acting as a stay.
Thus, referring to the accompanying drawings Figure 1 shows a plane-area carrying plate 2, with wall elements 3, 4, 5 arranged thereon, from which a housing 1 may be constructed. The wall elements 3,4 and 5 are identical and each comprises an insulating or supporting element 6, which is secured to a supporting plate 7, for example in the course of the expanding action for production of the insulating or supporting element consisting of expanded plastics material.
Analogously, it is also possible however within the scope of the invention, to produce the insulating or supporting element 6 from other insulating materials, for example from glass fibres, which may be connected by a bonding operation to the supporting plate 7 which may equally consist of wood, plastics material, aluminium or analogous materials.
The application of the wall elements 3, 4, 5, on the plane-surfaced carrying plate 2 may be performed by a bonding operation, for example under vacuum, or by direct expansion of the insulating or supporting elements 6 formed by expanded plastics material.
The manner in which a housing 1 having the required external shape may be produced by bending of the flat carrying plate 2, is shown in Figure 2. Since the wall elements 3, 4 and 5 are in each instance positioned with a mutual spacing a (Figure 1) which corresponds to the arc length of the curvatures to be established between the flat wall elements 3, 4 and 5, the parts of the carrying olate 2 reinforced by installing the wall elements 3,4,5 may be placed into a desirable angular position with respect to each other, by being pivoted with respect to each other. During this relative displacement of the wall elements 3, 4 and 5, the carrying plate 2 is deformed in its weaker sections 8, that is to say sections which are not reinforced by wall elements 3, 4 and 5.
The relative pivotal displacement of the wall elements 3 and 4 illustrated in Figure 2 may be limited by the insertion of an abutment element 9.
The spacing a between the wall elements 3, 4, 5, are dimensioned in such a manner that their longitudinal end sides 10 overlap each other.
So that an appropriately stable load-carrying housing 1 may be produced with an uninterrupted supporting framework, carrying members 11 are incorporated in those areas of the carrying plate portions 8 which are~weakened by the bending.
These carrying members 11 may comprise prefabricated plastics material sections, for example produced by a continuous process from expanded plastics material, which are inserted, after bending of the carrying plate 2, into the cavities left between the carrying plate 2 and the longitudinal end sides 10 of the wall elements 3,4 and are joined via adhesive coatings in force locked and form-locked manner to adjacent panels, or in particular to the insulating or supporting elements 3,4 and 5. In the embodiment shown, each carrying member 11 is formed by an expanded plastics material, the joint between the carrying plate 2 and the longitudinal end sides 10 of the insulating or supporting elements 6 of the wall elements 3,4 being established during the production of the carrying member 11 consisting of expanded plastics material.The mould for production of this carrying member 11 is formed, in this embodiment, by the carrying plate 2 in the carrying plate portion 8 and the two wall elements 3,4 together with the abutment element 9 which at the same time acts as a seal.
The expansible plastics material is placed in the mould formed by these parts in liquid form, and during solidification establishes a form-locked and force-lockeds well as highly stressable joint between the different separate elements, whereby an uninterrupted load-bearing sandwich structure is produced for the housing 1. The advantage of this system consists in that the housing has a substantially uninterrupted external skin formed by the carrying plate 2, and that the surfaces corresponding to the required purpose of application may be incorporated at the inner sides of the housing by appropriate selection of the material for the supporting plates 7.
As apparent moreover from Figure 1, the carrying plate comprises plate sections 1 3 projections beyond the longitudinal end sides 12 of the wall elements 3 and 5 facing way each other. After bending the carrying plate 2 to establish the required angular position or setting between the wall elements 3, 4, 5 and after the insertion of a floor panel 14, these plate sections 13 are also deformed into the position shown in Figure 2. To obtain an uninterrupted housing having a parallelepipedal or circular crosssectional shape, the cavity remaining between the longitudinal end sides 12 and 15 of the wall and floor element 3 and 14 respectively and the carrying plate 2 is also filled with a carrying member 11 which is securely joined or bonded to the wall and floor elements 3, 5, 14 as well as the carrying plate 2.
Let it also be stated at this juncture that it is obviously also possible to install all four or more wall elements forming a housing having an unbroken outer surface, and thereupon to deform the latter in such a manner that the insertion of complementary floor 14 may be omitted.
Moreover, this kind of joint between individual wall elements is obviously also applicable for joining housing members or wall elememts abutting on each other end to end. In particular, it is thus possible to join two housing members formed by identical carrying plates 2 together in the area of the end sides 1 6 of the wall elements 3,4 and 5 into an uninterrunted housing.
The manner in which two wair eiemeiits T7, 18, constructed as sandwich elements, may be joined together into a one-piece housing, is shown in Figure 3. Each of the wall elements 17 and 18 comprises a carrying plate forming the outer side and a supporting plate 20 forming the inner side.
These are joined together in force-locked and form-locked manner via an insulating or supporting element 21 consisting of an expanded plastics material, in particular hard polyurethane foam or the like, if appropriate with interpositioning of spacers. The two wall elements 17, 18 are clamped in a mould 24 to produce a one-piece housing or rather a force-locked and form-locked joint between the two longitudinal end sides 22, 23. After clamping, or rather after establishing a hermetic joint between the mould elements 25, 26, expansible plastics material in liquid form is fed in via a feedhead pipe 27.The expansible plastics material fed in fills the mould 24 and this produces the carrying member 28 which by virtue or the properties of the expanded plastics material is joined in force-locked, form locked and very powerful manner to the longitudinal end sides 22, 23 of the wall elements 1 7, 1 8. As shown complementarily, foils 29 which may for example consist of the same material as the carrying or supporting plates 1 9, 20, may be placed on the inner sides of the mould elements 25,26, prior to infeed of the expansible plastics material for production of the carrying member 28.Thanks to the intimate connection between these foils and the carrying member 28, uninterrupted outer and inner skins of identical material are produced together with the production of this carrying member and with joining the wall elements 1 7, 18 into a monosectional or onepiece housing. So that the strength characteristics of the carrying member 28 may be adapted to different requirements, a heating bar 30 supplied from a voltage source may for example be incorporated in one or both of the mould elements 25, 26.
Figure 4 shows an embodiment wherein the wall elements 17, 18 which are equally produced as sandwich elements, are joined together via a carrying member 31 which comprises a carrying unit 32 and an expanded core 33. The carrying unit 32, for example consisting of a drawn aluminium section, comprises receiving recesses 34, 35 which are formed to receive the wall elements 1 7, 1 8. These U-shaped reception recesses 34, 35 are connected via openings 36 to a cavity 37 of the carrying unit 32. Afeedhead opening 38 through which the expansible plastics material may be fed into the cavity 37 and via the openings 36 to the end sides 22, 23 of the wall elements 1 7, 1 8, is incorporated at a point of the carrying unit 32.A force-locked and form-locked joint between the end sides or rather longitudinal end sides of the elements 17, 18, and thus a force-locked and form-locked joint and an one piece housing, are secured by filling the cavity 37 as well as the openings 36 with expanded plastics material.
The abutment elements 9 and the carrying units 32 may evidently be produced from any desirable material, such as aluminium, plastics material, wood or the like, to accomplish an adaptation to the corresponding surfaces of the wall elements 1 7 and 1 8. In particular, the embodiments shown in Figures 3 and 4 also proved to be advantageous for joining several onepiece housing members formed from separate carrying plates, into a housing. The manner in which two housing members 39,40 comprising several wall elements 3, 4, 14 etc. for example, may be connected into a common housing is shown in Figure 5.In the housing element 39, the carrying plate 2 is connected to the wall elements 3, 4, 1 4, in such manner that it projects beyond the end sides of these wall elements by a particular span which corresponds to the width of the carrying member 42 which is to be produced.
At the inner side of the housing, this carrying member 42 is delimited by the supporting plate 43 which projects to the same degree as the carrying plate 2 beyond the end side 41 of the housing elements 3, 4, 1 4. A substantially closed mould is thereby formed between the end sides 41, 44 which, after filling with expanded plastics material accommodates the carrying member 42 for force-locked and form-locked connection of the wall elements of the two housing members 39,40.
In addition to, or instead of, the plate sections projecting beyond the end sides 41,44, it is also possible to incorporate a carrying unit 45 in the area of the junction of the two housing members 39, 40. In accordance with the nature of the joint, the two reception recesses 46, 47 of this carrying unit 45 are situated in the same plane, i.e. the carrying unit 45 is constructed in the manner of a plug-in sleeve. The outer side of the carrying unit 45 co-ordinated with the carrying plate 2 may concomitantly be made in the form of a chromium or rubber moulding or the like, for a better appearance.
Any and all possibilities are available within the scope of the invention, regarding the wall elements and their structure. The insulating and supporting elements may thus be formed by any kind of plastics material or analogous insulating material. It is equally possible to produce the supporting plates from wood, plastics material, metal or non-ferrous metals, to obtain an outer or inner housing surface fulfilling the prevailing requirements. It is also possible furthermore to make use of carrying plates 2 which have an outline corresponding to the required external shape, to obtain wholly closed housings, for example in parallelepipedal, cubical or analogous form. After the application of the corresponding insulating or supporting elements, a housing may be formed by bending and upsetting from the external surface of the carrying plate. The individual seam emplacements are concomitantly joined together in form-locked and force-locked manner under application of hermetic abutment elements 9, moulds 24 or carrying units 32.
Figure 6 shows an initially piane-surface housing member 49 which forms a portion of a housing 48 according to the present invention, the housing for example being a vehicle body for a small commercial vehicle which may be fitted out or constructed as a recreational vehicle, a refrigerated vehicle, workshop truck or the like.
This housing member comprises the carrying plates 50,51, 52, 53 and 54. Insulating or supporting elements 55 are incorporated between the carrying plates 50,51, and 52, 53, and 52, 54. These insulating or supporting elements may for example be formed by prefabricated panels consisting of hard expanded plastics material or the like. These insulating or supporting elements 55 are joined to the carrying plates 50, 51,.52, 53, 54 by means of layers 56 of adhesive. This connection is commonly established in such manner that after application of the adhesive coatings 56, these plane housing members 49 are compressed under high pressure in a vacuum chest, until the adhesive is set.The insulating or supporting elements are in each case positioned with mutual spacing so that differentially reinforded areas between the individual insulating or supporting elements 55 are in each case overbridged only by one of the carrying plates 51 or 52.
Housings of different cross-section shape may henceforth be produced thanks to this particular intentional reinforcement of the housing wall members and to the mutualy overlapping arrangements of the individual carrying plates corresponding to the required housing shape which is to be produced.
The manner in which the housing wall member 49 illustrated in figure 6 may be deformed into a housing 48 of changing cross-sectional shape, is shown in figure 7. As can be seen the individual wall elements 57, 58 and 59 in this housing member or rather plastics material sandwich component comprise the previously described carrying plates 50, 51, 52, 53, 54 bonded together with an insulating or supporting element 55, being so-called plastics material sandwich elements.
The area of transition 60, 61, 62 between the individual insulating or supporting elements 55 is bridged either by the carrying plate 51 or by the carrying plate 52. As can be seen the carrying plates 51,52 installed at the outer curvature sides are arranged to be uninterrupted in these areas of transition 60, 61,62. So that an angular contour of the carrying plates 50,52 and 51, 53 or 53, 54 installed at the inner curvature side may be obtained instead of the curved contour of the carrying plates 51,52, the carrying plates or the insulating or supporting elements 55 are recessed or spaced apart in these areas of transition or deformation 60, 61,62.
The production of a force-transmitting joint between the individual wall elements 57 and 58, and 58 and 59, for forming an one-piece housing, may now be performed under insertion of different carrying members. As shown by way of example at the inner curvature side between the wall elements 57 and 58, an uninterrupted angular section 63 may act as a carrying member 64 between the carrying plates 50, 52. The connection of this section 63 to the carrying plates 50, 52 may be established via a layer 65 of adhesive or via any mechanical connecting means.
Another embodiment of a carrying member 66 is shown in the area of transition between the carrying plates 51 and 53. The carrying member 66 formed by a section 67 comprising offset vertical branches is connected to the carrying plates 51, 53 or the insulating or supporting elements 55 by means of rivets 68, in the example of embodiment illustrated. Instead of making use of the rivets 68, or complementarily if appropriate, a carrying member 69 formed by expansion of an expansible plastics material may be incorporated complementarily in the cavity formed between the carrying plates 51 and 53 or rather the supporting elements 55 and the carrying plate 52 covering the area of transition 61 at the outer curvature side.
Figure 7 demonstrates that upon joining two housing members 49 set one behind another in longitudinal direction the area of transition 70 between these two housing members 49 is bridged by a carrying member 66 which extends throughout the length in particular. Thanks to the intimate connection by means of the rivets 68 or of other mechanical securing means or thanks to the powerful adhesive action of the carrying member 69 produced from an expanded plastics material, the carrying member 66 acts as a tie rod or bending bar and distributes the stresses appearing in the area of transition 70 - resulting from differential stresses on the individual housing members 49 - uniformly between both housing members 49.
Figure 9 illustrates a housing 71, for example as installed on the chassis of a small commercial vehicle 72 as a living compartment for recreational use. This housing 71 has varying cross-sectional shapes comprising compartment heights 73, 74. The two housing sections 75, 76 are concomitantly devised in such manner that the carrying plate 77 of the housing section 75 overbridges the area of transition 78 between the compartment heights 73, 74. Since, as shown by the dashed lines moreover, the carrying members 79 at the inner curvature side of the housing sections 75, 76 are arranged to be uninterrupted in longitudinal direction at least within the roof section, a substantiallv more massive form of the housing 71 is obtained and in particular, difficulties and excessive stresses on the carrying plates 77 are averted in the area of transition 78 between the two compartments heights 73, 74 in the driver's cab section of the small commercial vehicle 72.
Figure 10 complementarily illustrates a possible embodiment of a carrying member 80 which is equipped with centring or abutment surfaces 81, 82 for lateral centring of the wall elements or of the carrying plates situated at the inner curvature side, and comprising centring or abutment surfaces 83, 84 for vertical centring of the wall elements or of the carrying plates situated at the inner curvature side.
In figure 10, it is demonstrated moreover that the carrying member 80 may for example also be equipped with anchoring members 85 which extend transversely to its longitudinal extension and project into the cavity between the carrying plates situated at the inner curvature side or rather into the cavity present externally between the carrying plates ovebridging the area of transition between the wall elements. These anchoring members 85 are Of plate-like structure in the present example, and thus serve the purpose of increasing the tensile strength of this carrying member and thereby of raising the flexural rigidity or torsional rigidity of the cabs produced as onepiece tubular housings.
This embodiment of a living compartment is particularly appropriate in combination with the bridging of the areas of transition between different cross-sectional shapes and wall elements, for application in the recreational sphere as a mobile dwelling or touring caravan or motor home, since in their case, the housing members should project above the driver's cab of the small commercial vehicle for optimum space utilisation.
Furthermore, this cabin construction technique is equally appropriate for the production of the greatest possible variety of commercial superstructures, for example in particular for refrigerated vehicles or vehicles intended for supplying fresh produce, wherein an uninterrupted.
highly effective insulation is required to maintain a constant low temperature. Furthermore, in view of the improved strength characteristics with respect to flexing or twisting actions, the one-piece design of the housings allows of the application of wall elements of lesser wall thickness for an identical strength value.

Claims (21)

1. A housing for a vehicle having a hollow crosssectional shape and comprising wall elements of plastics material sandwich elements comprisin9..
insulating or supporting elements situated between an external and an internal carrying plate, and wherein in that at least one of the carrying plates is arranged to bridge the area of transition between adjacent wall elements and/or between varying or differing cross-sectional shapes of the housing, the housing being formed by at least one plastics material sandwich component assembled from several wall elements.
2. A housing according to claim 1, wherein the wall elements are joined together in force-locked and form-locked manner via a carrying member which may be inserted and, in particular, expanded between the said wall elements.
3. A housing according to either claim 1 or claim 2, wherein the wall elements comprise insulating and/or supporting elements applied on a common carrying plate, joined to the latter in force locked and form-locked manner and if appropriate equipped at one side with a supporting plate, said wall elements being joined together into a one piece housing via the carrying member, which is joined in force-locked and form-locked manner to the carrying plate and to the wall elements by means of an adhesive and in particular an expanding operation.
4. A housing according to either claim 1 or claim 2 wherein the wall elements are formed by prefabricated and in particular plane-surfaced carrying and supporting plates which are interconnected via a load-bearing insulating or supporting element and form part of a sandwich element and are joined together in force-locked and form-locked manner into a one-piece housing via the carrying member consisting of expanded plastics material.
5. A housing according to claim 2, wherein the carrying member or members may be installed by expansion between the wall elements of the carrying plate immobilised if appropriate in their terminal positions by abutment members, the abutment elements being constructed as seals in particular, after the application of the wall elements on the common carrying plate and after a deformation of this carrying plate corresponding to the required angular relationship between the wall elements.
6. A housing according to one of the claims 1 to 5, wherein the carrying member is formed by an expanded plastics material core which may be inserted by expansion between the wall elements which may be clamped in the mould for production of the carrying member, and foils applicable on the delimiting surfaces of the mould sections.
7. A housing according to one of the claims 1 to 6, wherein the carrying member is formed by an expanded plastics material core which may be inserted by expansion in a section-shaped cavitytype carrying member comprising reception recesses for the wall elements, the carrying member being equipped with openings .connecting the cavities to the wall elements.
8. A housing according to one of the claims 1 to 7, wherein the carrying member is formed by an expansible plastics material core which may be joined in force-locked and form-locked manner to the end sides of housing members, the expansible plastics material core preferably being insertible by expansion between portions of the carrying or supporting plate which project in equal or unequal degree and in mutual confrontation beyond the end sides of the housing members.
9. A housing according to claim 7, wherein the reception recesses of the carrying members are arranged for reception of the housing member end sides and are substantially situated in the same or in approximately parallel planes.
10. A housing according to claim 1 , wherein the carrying plates of a plane-surfaced plastics material sandwich element are so constructed as to be differentially deformable along their surface area for forming different cross-sections or cross sectional shapes and wherein a carrying plate as well as the insulating or supporting elements are installed spaced apart or rather parts of said carrying plate and of the insulating or supporting element may be drawn apart, in the areas of deformation of the other carrying plate.
11. A housing according to any one of'cl'aims' to 10, wherein the carrying plate installed at the inner curvature side in the longitudinal direction of curvature, as well as the insulating or supporting element are arranged to be spaced apart or drawn apart in the area of deformation of components curved in equal or unequal degree and in opposed directions, in particular of the cabin floor of vehicle bodwork for small commercial vehicles, as well as in the area of deformation of the carrying plate installed at the outer curvature side.
12. A housing according to any one of claims 1 to 11, wherein the insulating or supporting elements and/or the carrying plates installed at the inner curvature side may be joined to each other in force-locked and or form-locked manner via carrying members, the carrying members preferably being insertable into the cavity remaining between the carrying plates and the insulating or supporting elements.
1 3. A housing according to any one of claims 1 to 12, wherein the carrying members are constructed as shaped members of aluminium, which extend in the longitudinal direction of curvature and comprise mutually angularly extending centering or abutment members or surfaces for the insulating or supporting elements or carrying plates, and may by joined to the insulating or supporting elements and/or the carrying plates in force-locked and/or form-locked manner, preferably by an adhesive or expanding operation.
14. A housing according to any one of claims 1 to 13, wherein the carrying member is equipped with anchoring members which project into the cavity between the carrying plates and the insulating or supporting elements, said anchoring members preferably being aligned transversely to the longitudinal direction of curvature.
15. A housing according to any one of claims 1 to 14, wherein the carrying member is so constructed as to be uninterrupted in the longitudinal direction of curvature in particular, is installed to bridge the areas of transition between different cross-sections or cross-sectional shapes and/or housing or structural members, and is constructed to bear stresses in its longitudinal direction.
16. A housing according to any one of the claims to 15, wherein the centering or abutment' members or surfaces of the carrying members are jointed to the wall elements or housing members by means of a layer of adhesive or by mechanical connecting means.
17. A process for the production of a housing according to any one of claims 1 to 1 6, in which at least two wall elements formed in composite manner of construction are interconnected in form-locked manner, wherein a carrying plate having a plane-surface and which in its dimensions preferably corresponds to the external surface of the housing which is to be produced, is joined to insulating and/or supporting elements corresponding to the dimensions of the planesurfaced wall elements, after the application of an adhesive layer on the carrying plate, in forcelocked and form-locked manner under vacuum in particular, whereupon the insulating or supporting elements placed on the carrying plate are brought into the required angular position with respect to each other by a deformation of the carrying plate, and that the cavity between the carrying plate and the insulating and/or supporting elements which may if appropriate be delimited by a shaped mernber installed in the area of the supporting plates, is subsequently filled with expanded plastics material to form the carrying member and a one-piece housing or housing member.
18. A process for production of a housing according to one of claims 2 to 1 6 in which at least two wall elements formed in composite manner are joined together in form-locked manner, wherein at least two prefabricated wall elements each having a plate surface and which each comprise a sandwich element consisting of a carrying and supporting plate joined together via a load-carrying insulating and/or supporting element, have their longitudinal end sides which are to be joined together clamped in a mould matching the external shape of the carrying member which is to be produced, and that the expansible plastics material is thereupon fed into the cavity between these longitudinal end sides to produce the carrying member.
19. A process according to claim 17 or 18, wherein the mould or the cavity receiving the expansible plastics material for the production of the carrying member is heated during the expanding operation for securing desirable strength characteristics.
20. A housing for a vehicle substantially as hereinbefore described with reference to the accompanying drawings.
21. A process for manufacturing a housing substantially as hereinbefore described with reference to the accompanying drawings.
GB7920083A 1978-06-08 1979-06-08 Insulating bodies for caravans or commercial vehicles Expired GB2027397B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0418378A AT373561B (en) 1978-06-08 1978-06-08 HOUSING, IN PARTICULAR VEHICLE BODY, AND METHOD FOR THE PRODUCTION THEREOF

Publications (2)

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GB2027397A true GB2027397A (en) 1980-02-20
GB2027397B GB2027397B (en) 1983-04-27

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GB7920083A Expired GB2027397B (en) 1978-06-08 1979-06-08 Insulating bodies for caravans or commercial vehicles

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JP (1) JPS552199A (en)
AT (1) AT373561B (en)
AU (1) AU530037B2 (en)
BR (1) BR7903648A (en)
CA (1) CA1122768A (en)
DE (1) DE2856462A1 (en)
ES (1) ES481401A1 (en)
FR (1) FR2428201A1 (en)
GB (1) GB2027397B (en)
PL (1) PL216184A1 (en)
SE (1) SE7905008L (en)

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EP0783991A1 (en) * 1996-01-15 1997-07-16 Technische Universiteit Delft Self-supporting refrigerated truck
GB2348174A (en) * 1999-03-22 2000-09-27 Don Bur Vehicle having a roof comprising inner and outer moulded skins
ITFI20090277A1 (en) * 2009-12-29 2011-06-30 Laika Caravans S P A PROCEDURE AND ASSEMBLY DEVICE FOR THE CONSTRUCTION OF LIVING ROOMS FOR CARAVAN AND AUTOCARAVAN
CN102285383A (en) * 2011-07-04 2011-12-21 深圳市新光里科技有限公司 Vehicle tank

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NL8101394A (en) * 1981-03-20 1982-10-18 Alle Heida CLOSED SELF-CARRYING TRUCK FOR A TRUCK, TRAILER OR TRAILER.
DE3514411A1 (en) * 1985-04-20 1985-09-05 Ingo 4500 Osnabrücke Remmert Box body for road vehicles and other mobile transport means
FR2620999B1 (en) * 1987-09-24 1993-09-24 Trigano PROCESS FOR ASSEMBLING THE PANELS OF A VEHICLE BODY AND PROFILE DESIGNED FOR THE IMPLEMENTATION OF THIS PROCESS
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DE4202391A1 (en) * 1992-01-29 1993-08-05 Sika Chemie Gmbh Profiled joint for vehicle body parts - has grooves in recesses for adhesive beads applied with shaped nozzle
DE4302488C2 (en) * 1993-01-29 1999-08-05 Dwa Deutsche Waggonbau Gmbh Car body for rail vehicles
DE4422225C2 (en) * 1994-06-24 2003-04-17 Elze Waggonbau Gmbh & Co Kg Corner connection for containers used to transport goods
DE29513300U1 (en) * 1995-08-18 1996-09-19 Hymer AG, 88339 Bad Waldsee Adhesive connection of components of the outer shell of a motorhome or caravan body
DE19852383B4 (en) * 1998-11-13 2007-01-25 Webasto Ag Roof module for a vehicle and method of making the same
DE10061785A1 (en) * 2000-12-12 2002-06-27 Unsinn Fahrzeugtechnik Gmbh Luggage structure for vehicles and vehicle trailers has end wall and side walls made from one piece drawn up at the top by transition curves into the roof
DE202006004985U1 (en) * 2006-03-27 2007-08-09 Innovida Holdings Inc., Hallandale Beach Sandwich panel composite
DE202010011050U1 (en) * 2010-08-04 2011-11-18 Brüggen Oberflächen- und Systemlieferant GmbH Wall structure of a transport vehicle with side walls

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Publication number Priority date Publication date Assignee Title
EP0783991A1 (en) * 1996-01-15 1997-07-16 Technische Universiteit Delft Self-supporting refrigerated truck
GB2348174A (en) * 1999-03-22 2000-09-27 Don Bur Vehicle having a roof comprising inner and outer moulded skins
ITFI20090277A1 (en) * 2009-12-29 2011-06-30 Laika Caravans S P A PROCEDURE AND ASSEMBLY DEVICE FOR THE CONSTRUCTION OF LIVING ROOMS FOR CARAVAN AND AUTOCARAVAN
CN102285383A (en) * 2011-07-04 2011-12-21 深圳市新光里科技有限公司 Vehicle tank
CN102285383B (en) * 2011-07-04 2013-07-10 深圳市新光里科技有限公司 Vehicle tank

Also Published As

Publication number Publication date
AU4789979A (en) 1979-12-13
SE7905008L (en) 1979-12-09
AT373561B (en) 1984-02-10
DE2856462A1 (en) 1979-12-20
ATA418378A (en) 1983-06-15
JPS552199A (en) 1980-01-09
FR2428201A1 (en) 1980-01-04
GB2027397B (en) 1983-04-27
PL216184A1 (en) 1980-02-25
ES481401A1 (en) 1980-02-01
CA1122768A (en) 1982-05-04
AU530037B2 (en) 1983-06-30
BR7903648A (en) 1980-02-05

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PCNP Patent ceased through non-payment of renewal fee