WO1996030704A1 - Systeme de jonction permettant d'abouter deux composants en tole par juxtaposition de leurs bords et reseau de distribution d'air integrant un tel systeme de jonction - Google Patents

Systeme de jonction permettant d'abouter deux composants en tole par juxtaposition de leurs bords et reseau de distribution d'air integrant un tel systeme de jonction Download PDF

Info

Publication number
WO1996030704A1
WO1996030704A1 PCT/GB1996/000778 GB9600778W WO9630704A1 WO 1996030704 A1 WO1996030704 A1 WO 1996030704A1 GB 9600778 W GB9600778 W GB 9600778W WO 9630704 A1 WO9630704 A1 WO 9630704A1
Authority
WO
WIPO (PCT)
Prior art keywords
jointing system
sheet material
turned down
ducts
edges
Prior art date
Application number
PCT/GB1996/000778
Other languages
English (en)
Inventor
Graham John Haclin
Original Assignee
Graham John Haclin
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
Priority claimed from GBGB9506670.0A external-priority patent/GB9506670D0/en
Priority claimed from GBGB9604939.0A external-priority patent/GB9604939D0/en
Application filed by Graham John Haclin filed Critical Graham John Haclin
Priority to AU51571/96A priority Critical patent/AU5157196A/en
Priority to EP96908255A priority patent/EP0834045A1/fr
Publication of WO1996030704A1 publication Critical patent/WO1996030704A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0209—Ducting arrangements characterised by their connecting means, e.g. flanges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0227—Ducting arrangements using parts of the building, e.g. air ducts inside the floor, walls or ceiling of a building
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0236—Ducting arrangements with ducts including air distributors, e.g. air collecting boxes with at least three openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0254—Ducting arrangements characterised by their mounting means, e.g. supports

Definitions

  • This invention relates to a jointing system which joins two sheet material components at juxtaposed edges thereof, each of the sheet material components having an externally visible surface. More particularly, although not exclusively, this invention relates to a jointing system which is suitable for joining ventilation ductwork end to end in an exposed location and to ductwork incorporating such a jointing system.
  • Such cladding may comprise thin gauge (say 20 or 22 SWG) aluminium sheet laid on a layer of mineral wool insulation. Such painting or cladding leads to an increase in cost and/or weight.
  • US-A-3791681 discloses a jointing system for joining two cylindrical sheet metal conduit elements together at juxtaposed edges, each of the sheet metal elements having an externally visible surface and an inner surface.
  • the marginal portions of the sheet metal elements that is to say the portions of those element that form the respective ones of the juxtaposed edges at the joint, are bent outwards.
  • a connecting strip having a U-shaped cross-section is snap-fitted over the radially-outwardly bent marginal portions of the sheet metal elements so as to urge the latter into sealing engagement with a sealing strip of elastomeric material which is between them. The end result is that the gap between the juxtaposed edges of the cylindrical sheet metal elements is concealed from view by the connecting strip.
  • An object of this invention is to provide a jointing system which will be acceptable from both the structural and aesthetic standpoint and which will not incur cost and/or weight penalties such as are referred to above.
  • a joining member is secured to the inner surfaces of the two components so that it straddles the juxtaposed edges of the two components and it is formed with a groove which extends along and is concave to those edges, and the sheet material components are turned down at those edges, the turned down edge portions extending inwardly, away from said externally visible surfaces and into the hollow formed by the groove, an externally visible bend radius being formed where each turned down portion meets its respective externally visible surface.
  • This invention is applicable to any industrially formed product which includes a joint between two sheet material components which have externally visible surfaces and which might otherwise be painted or clad for aesthetic purposes.
  • a preferred application however is to joining end to end large ducts, such as ventilation ducts, which may have a cross-section which is circular or 'half-oval', that is to say opposed semi-circular portions interconnected by substantially parallel straight portions.
  • a feature of this invention comprises using a cable to support ductwork which incorporates a jointing system which embodies this invention, the supporting cable running in the hollow formed by the groove that runs circumferentially between a juxtaposed pair of tubular sections of such ductwork.
  • the support cable would be of an appropriate diameter (e.g. 5 roil) and preferably would be Stainless Steel or galvanised steel cable.
  • the cable and other elements of the support system in which this invention is embodied are virtually invisible to an observer standing at or below or at the side of the supported duct.
  • the ductwork may be supported horizontally or vertically.
  • a system in which this invention is embodied may be used to support single horizontal ducts which may be circular or 'flat-oval' and can be adapted to incorporate the additional support for cable trays and/or other services in the blind spot between the duct and overhead support structure ( e.g. a ceiling).
  • the invention may be used to support single or multiple ducts.
  • the cables extend from a suitable cable bracket which will cradle the ducts with the tensioned cable acting as the retaining mechanism. In practice, the bracket is mounted on an adjacent surface, typically vertical.
  • the cable support system can be used to hold one or more ducts in a horizontal position.
  • the cables pass below the duct and may hold the duct against a crescent shaped cradle support.
  • FIG 1 is a schematic in plan of part of a twin duct ventilation system which embodies this invention
  • Figure 2 is an isometric view of a ventilation system splitter box which embodies this invention
  • Figure 3 is a view of the structure of the splitter box shown in Figure 2 with the external aluminium sheeting removed;
  • Figure 4 is a sectioned fragment of the splitter box shown in Figure 2, the section being on the line IV-IV in Figure 2;
  • Figure 5 is a sectioned fragment of the splitter box shown in Figure 2, the section being on the line V-V in Figure 2;
  • Figures 6 to ' 11 are views similar to Figures 4 and 5 of different embodiments of the invention.
  • Figure 12 is a section on the line XII-XII in Figure 1 showing one form of suspension of the ducts shown in Figure 1;
  • Figure 13 is a view in perspective on arrow A in Figure 12 of a support arrangement for a juxtaposed pair of vertical ducts of the system shown in Figure 1;
  • Figure 14 is view similar to Figure 12 of a single duct which embodies this invention;
  • Figure 15 illustrates installation of a 'flat-oval' ventilation duct in a confined space
  • Figure 16 is a section on the line XVI-XVI in Figure 15 of the mechanism shown in Figure 15.
  • FIG. 1 shows a ventilation ductwork system which comprises two long ventilation ducts 10 and 11 which are supported horizontally, side by side from a roof 12 by a suspension system at spaced intervals along the ducts
  • Figure 2 shows a splitter box 14 which provides a junction between the two longitudinally extending, parallel ducts 10 and 11 and two laterally extending branch ducts 15 and 16 which are circular as well.
  • the splitter box 14 and the ducts 15 and 16 are formed of a number of 18 SWG rigidised aluminium sheets which are joined at their edges.
  • the ventilation system including the ducts 10 and 11 and the splitter box 14 is suspended from the roof of a large hall or similar enclosure so that it is exposed to view from below. At least those joints between juxtaposed aluminium sheets of the splitter box 14 and of the ducts 10 and 11, which are visible from below, as well as those of the branch ducts 15 and 16 are joined by a jointing system which embodies this invention.
  • Figures 4 and 5 show such joints which each comprise an inner joining member 17, 18 secured to the sheets by rivets 19.
  • any suitable securing means such as screws or an adhesive could be used.
  • Figure 2 shows that the splitter box 14 has a so-called 'flat oval' cross-section, comprising semi ⁇ circular side walls 21 and 22 which are interconnected by flat walls 23 and 24 at its top and its bottom, and which is closed by flat walls 25 and 26 at either end.
  • Two circular apertures 27 and 28, 29 and 31 are formed in each end wall 25,26, each being substantially coaxially aligned with one of the apertures 27-29,31 in the other end wall 25,26.
  • Each of these apertures 27- 29,31 is for connection into a respective one of the longitudinally extending ventilation ducts 10 and 11.
  • Two circular apertures 32 and 33 are formed in one, 22 of the semi-circular side walls 21 and 22 and are for connection to the laterally extending ducts 15 and 16.
  • the inner joining members are part of an inner framework 34 which reinforces the aluminium sheeting at the joints and which is shown in Figure 3.
  • Each duct 10,11,15,16 comprises lengths of the rigidised aluminium sheet which are rolled into tubes. Juxtaposed tubes are joined together end to end by a jointing system which embodies this invention.
  • the joining member is an inner joining ring which is secured to the inner surfaces of the tubes it joins and which conveniently is as is illustrated at 18 in Figure 5.
  • the ducts are large, having a diameter of at least 2 metres.
  • the joining member 17 shown in Figure 4 has a top hat section. It is formed of aluminium , conveniently 14 or 16 SWG. It is suitable for joining flat sheets at their edges. It may be an extrusion or it may be a pressing. It is not limited in its application to joining flat sheets. It could be arcuate in form. Indeed it could formed as a ring as has been described for the ducts.
  • the joining member 18 shown in Figure 5 is arcuate, being either semi-circular as shown in Figures 2 and 3, or being a ring as has been described for the ducts 10,11,15 and 16.
  • Figure 5 shows it has a deep arcuate groove 35 formed in it.
  • the groove 35 is formed by swaging. It may be formed from 14 or 16 SWG aluminium strip, or it may be formed of titanium, stainless steel, a plastics material or a composite.
  • the jointing system comprises each of the sheets 36 and 37, 38 and 39 to be joined being turned down at its edge to be joined. The turned down edge portions extend into the groove formed by the joining member (see 41 and 42 in Figure 4 and 43 and 44 in Figure 5).
  • each turned down portion 41 to 44 is shown to be as far apart as they can be in Figures 4 and 5.
  • Figures 6 and 7 show they may be closer together, although still spaced apart.
  • the resultant gap between the pair of turned down portions 41 and 42, 43 and 44 and the base of the respective groove visible between them, as shown in Figures 4 to 7, forms what is known in architectural terms as a "shadow gap” which is aesthetically pleasing.
  • the concave surface of the groove may be darkened by painting or coating in order to enhance the "shadow gap” effect.
  • the groove formed by the joining member 17, 18 should be as deep as possible without the joining member 17, 18 projecting into the interior of the splitter box 14 or duct 10, II, 15, 16 so as to disturb flow through the splitter box 14 or duct 10, 11, 15, 16.
  • any voids between the turned down portions 41 to 44 and the concave surface of the groove in the joining member 17,18 may be filled with a synthetic mastic material 45 (see Figures 5 to 9) to enhance the rigidity of the joint.
  • FIGS 8 to 11 illustrate alternative forms of the jointing system in which the turned down portions 46 and 47 about one another. In these cases the aesthetic effect is provided by the radiused edges of the sheets between the turned down portions and the externally visible surfaces.
  • junction arrangements described above have the advantage that the aesthetic appeal from the exterior of the splitter box or joined ducts is such that external painting or cladding is not required. Also, the weight of the ducting is greatly reduced. A further advantage is that the use of a joining member with a smooth groove reduces the likelihood of turbulence in fluid flow in the ducts.
  • the jointing system described herein may be used for joining ducts which are to be used in a ductwork support system, as described in my co-pending International patent application no. PCT/GB96 which designates the priority of my British Patent application no. 9506814.4 filed 01 April 1995.
  • Figure 12 shows another form of suspension system for the ducts 10 and 11 which uses a feature of the jointing system that embodies this invention.
  • the suspension system 13 shown in figure 12 comprises a support bracket 48 which is mounted on the roof 12.
  • a crescent-shaped support cradle 49,51 for each duct 10,11 is supported below the bracket 48 by a respective arm 52,53 which depends from the bracket 48 to which it is rigidly secured.
  • Each crescent-shaped support cradle 59,51 receives the respective duct 10,11 in its concave surface which bridges a 'shadow gap' between juxtaposed tubular lengths 10A and 10B, 11A and 11B of the respective duct 10,11.
  • Each duct 10,11 is held engaged in the respective downwardly-facing concave surface of the respective support cradle 49,51 by a respective cable 54,55 which is secured at one end to the support bracket 48, which extends into the space between the ducts 10 and 11, passing over the respective end portion of the respective crescent-shaped support cradle 49,51 and into the groove 35 of the internal ring 18 that joins together the juxtaposed pair of tubular lengths 10A and 10B, 11A and 11B, and forms the 'shadow gap' therebetween, and which runs around that groove 35 on the diametrically opposite side of the duct 10,11 from the respective crescent-shaped support cradle 49,51 to the other end of the support cradle 49,51 to which it is secured.
  • a suitable tensioning mechanism 56,57 such as a turnbuckle, is fitted into each cable 54,55 by which the latter is tensioned.
  • Each cable 54,55 is preferably a Stainless Steel cable or a galvanised steel cable.
  • Separate cable trays may be suspended from the roof 12, one on either side of the support bracket 48 and each above a respective one of the lengths of duct 10,11.
  • a spacer device 58 is provided in the space between the ducts 10 and 11 and connected at either end to a respective one of the crescent-shaped cradles 49 and 51.
  • Figure 13 shows that the vertical branch ducts 15 and 16 are supported by a system which is similar to the system 13 just described with reference to Figure 12. The differences are that the arms 52A and 53A are pivoted onto the support' bracket 48A and extend horizontally therefrom to the crescent-shaped support cradles 49A and 51A which are also horizontal.
  • Figure 14 shows a single duct 61 supported by a Stainless Steel cable 62 which runs in a 'shadow gap' formed in the duct 61 and which is suspended by its ends from support structure 63.
  • a clevis 64,65 at either end of the cable 62 is pivotably connected to a respective angle bracket 66,67 of the support structure 63.
  • Each of the angle brackets 63 and 67 is fitted by one of its arms onto a screw 68 and they are fixed in position on the screw 68 by locknuts 69 so that the tension of the cable 62 which is tensioned by the weight of the duct can be adjusted by adjusting the relative locations of the angle brackets 66 and 67 on the screw 68.
  • Figure 14 shows the angle brackets 66 and 67 spaced apart by a distance which is less than the diameter of the duct 61.
  • Each angle bracket 66,67 is supported from a roof 71 overhead by a respective screw-threaded rod 72,73 which depends from a respective mounting bracket 74,75 which is mounted on the roof 71.
  • Each screw-threaded rod 72,73 extends through a respective aperture 76,77 in the other arm of the respective angle bracket 66,67 and through a respective aperture 78,79 in the respective mounting bracket 74,75, those apertures 76-79 allowing lateral displacement of the rods 72 and 73 relative to the respective angle and mounting brackets 66,67 and 74,75.
  • a cable tray 80 runs above the two angle brackets 66 and
  • the locknut and screw arrangement 68 and 69 for spacing apart the clevises 64 and 65 at the ends of the cable 62 and for supporting a cable tray 80 may be suspended from the roof 71 cables instead of the depending screw-threaded rods 72 and 73.
  • the supporting cables may depend from support brackets on the roof that are spaced apart by a distance that is greater than the spacing of the ends of the cable that runs around the 'shadow gap' in the duct. Indeed the distance between those support brackets on the roof may be substantially equal to the diameter of the duct.
  • Figures 15 and 16 illustrate installation of a 'flat-oval' ventilation duct in a confined space which is particularly suitable for use where weight and space are at a premium, such as in marine platforms, high-speed hydrofoils etc.
  • the 'flat-oval' duct 81 is suspended from two spaced wall-mounted brackets 82,83 by a Stainless Steel cable 84 which runs under the duct 81 in a 'shadow gap' .
  • a clevis 85,86 at either end of the cable 84 is pivotably connected to a respective nut member 87,88.
  • the latter is interengaged with a respective vertical setscrew 89,91 which is supported in a respective one of the wall- mounted brackets 82,83 with its head at its lower end so that it is accessible from below.
  • each nut member 87,88 is held against rotation by being fitted into a slot 92 which is formed by the respective bracket 82,83 as is shown in Figure 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Duct Arrangements (AREA)

Abstract

Selon la présente invention, deux tôles (38, 39) dont les faces externes sont apparentes, sont jointes par un élément de jonction (18) se présentant sur leurs bords de juxtaposition. Cet élément de jonction, fixé sur les faces intérieures des tôles, se place à cheval sur les bords de juxtaposition. La forme de l'élément de jonction (18) présente une rainure (35) concave par rapport aux bords de juxtaposition. Les tôles (38, 39) sont rabattues vers le bas au niveau des bords de juxtaposition, les parties rabattues (43, 44) l'étant vers l'intérieur, à partir des faces visibles extérieurement, dans le creux formé par la rainure (35). Des rayons de courbure apparents extérieurement sont réalisés à l'endroit où les différentes parties rabattues (43, 44) vers le bas rejoignent respectivement leur surface visible extérieurement.
PCT/GB1996/000778 1995-03-31 1996-04-01 Systeme de jonction permettant d'abouter deux composants en tole par juxtaposition de leurs bords et reseau de distribution d'air integrant un tel systeme de jonction WO1996030704A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU51571/96A AU5157196A (en) 1995-03-31 1996-04-01 A jointing system which joins two sheet material components at juxtaposed edges thereof and ductwork incorporating such a jointing system
EP96908255A EP0834045A1 (fr) 1995-03-31 1996-04-01 Systeme de jonction permettant d'abouter deux composants en tole par juxtaposition de leurs bords et reseau de distribution d'air integrant un tel systeme de jonction

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9506670.0 1995-03-31
GBGB9506670.0A GB9506670D0 (en) 1995-03-31 1995-03-31 A jointing system which joins two sheet material components at juxtaposed edges thereof
GB9604939.0 1996-03-08
GBGB9604939.0A GB9604939D0 (en) 1996-03-08 1996-03-08 Ductwork

Publications (1)

Publication Number Publication Date
WO1996030704A1 true WO1996030704A1 (fr) 1996-10-03

Family

ID=26306789

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/000778 WO1996030704A1 (fr) 1995-03-31 1996-04-01 Systeme de jonction permettant d'abouter deux composants en tole par juxtaposition de leurs bords et reseau de distribution d'air integrant un tel systeme de jonction

Country Status (3)

Country Link
EP (1) EP0834045A1 (fr)
AU (1) AU5157196A (fr)
WO (1) WO1996030704A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU688857B2 (en) * 1994-04-28 1998-03-19 Acme Group Pty Ltd Sealed ventilation tubing

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE710746A (fr) * 1968-02-14 1968-06-17
US3791681A (en) * 1971-02-17 1974-02-12 P Moldow Devices for establishing sealing connection between the ends of tubular members of sheet metal
FR2300292A1 (fr) * 1975-02-05 1976-09-03 Eaton Williams Raymond Chaudiere a electrodes
US5094273A (en) * 1989-07-24 1992-03-10 Acme Group Pty Ltd. Ventilation ducting
WO1994021971A1 (fr) * 1993-03-20 1994-09-29 Nuaire Limited Carter de ventilateur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE710746A (fr) * 1968-02-14 1968-06-17
US3791681A (en) * 1971-02-17 1974-02-12 P Moldow Devices for establishing sealing connection between the ends of tubular members of sheet metal
FR2300292A1 (fr) * 1975-02-05 1976-09-03 Eaton Williams Raymond Chaudiere a electrodes
US5094273A (en) * 1989-07-24 1992-03-10 Acme Group Pty Ltd. Ventilation ducting
WO1994021971A1 (fr) * 1993-03-20 1994-09-29 Nuaire Limited Carter de ventilateur

Also Published As

Publication number Publication date
EP0834045A1 (fr) 1998-04-08
AU5157196A (en) 1996-10-16

Similar Documents

Publication Publication Date Title
US5937605A (en) Adjustable face trim clip for drywall suspension grid
US6009683A (en) Round column cladding system
CA2347953C (fr) Systeme de tringle de finissage reglable
AU604230B2 (en) False ceiling or false wall constituted by a stretched sheet fastened
US5809709A (en) Method and apparatus for covering surfaces
CA2342564C (fr) Systeme de dissimulation pour rails de murs mobiles
US20230015651A1 (en) Suspended ceiling system and method for installing thereof
CA2269007C (fr) Tube de penderie a une piece ajustable pour appareils d'eclairage
US6314698B1 (en) Cladding panels of sheet metal or similar material for forming a coffered ceiling and a method for assembling of such panels
US20220162855A1 (en) Ceiling system
US8689505B2 (en) Profile-bending means for frame to be pocketed
US4319724A (en) Lightweight cable ladder
US5596858A (en) Cover for standing seam of roof which is clad with plastic membrane
EP0834045A1 (fr) Systeme de jonction permettant d'abouter deux composants en tole par juxtaposition de leurs bords et reseau de distribution d'air integrant un tel systeme de jonction
EP0238279A2 (fr) Bardage
EP1070894A3 (fr) Support de câble et système et méthode de distribution
EP0726199B1 (fr) Elément de paneau intérieur
JP3103968B2 (ja) 配管装置
JP2769362B2 (ja) 天 井
RU226451U1 (ru) Конструкция профильная
JPH0589632U (ja) 伸縮可能な天井継手構造
JP2877250B2 (ja) 防煙用仕切壁の取付構造
EP0830537A1 (fr) Reseau de gaines, systeme de soutien et de suspension
JPS6337683Y2 (fr)
JPH0734971Y2 (ja) 壁パネルの取付構造

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BB BG BR BY CA CH CN CZ DE DK EE ES FI GB GE HU IS JP KE KG KP KR KZ LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG US UZ VN AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
ENP Entry into the national phase

Ref country code: US

Ref document number: 1997 930510

Date of ref document: 19970930

Kind code of ref document: A

Format of ref document f/p: F

WWE Wipo information: entry into national phase

Ref document number: 1996908255

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWP Wipo information: published in national office

Ref document number: 1996908255

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: CA

WWW Wipo information: withdrawn in national office

Ref document number: 1996908255

Country of ref document: EP