WO1983002789A1 - A machine for removing surface water - Google Patents

A machine for removing surface water Download PDF

Info

Publication number
WO1983002789A1
WO1983002789A1 PCT/GB1983/000024 GB8300024W WO8302789A1 WO 1983002789 A1 WO1983002789 A1 WO 1983002789A1 GB 8300024 W GB8300024 W GB 8300024W WO 8302789 A1 WO8302789 A1 WO 8302789A1
Authority
WO
WIPO (PCT)
Prior art keywords
machine
liquid
backing
reinforcing layer
absorbent element
Prior art date
Application number
PCT/GB1983/000024
Other languages
French (fr)
Inventor
Limited Motomop
Original Assignee
Weatherill, Louis
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weatherill, Louis filed Critical Weatherill, Louis
Priority to AU12219/83A priority Critical patent/AU1221983A/en
Priority to JP83500719A priority patent/JPS59500178A/en
Priority to MC83GB8300024D priority patent/MC1588A1/en
Publication of WO1983002789A1 publication Critical patent/WO1983002789A1/en
Priority to DK455583A priority patent/DK455583A/en
Priority to FI833592A priority patent/FI833592A0/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
    • E01H1/10—Hydraulically loosening or dislodging undesirable matter; Raking or scraping apparatus ; Removing liquids or semi-liquids e.g., absorbing water, sliding-off mud
    • E01H1/108—Removing liquids or semi- liquids, e.g. absorbing rain water, sucking-off mud
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/38—Meshes, lattices or nets

Definitions

  • This invention relates to a machine for removing surface water from, for example, playing fields and other recreational areas.
  • the present invention provides a machine for . removing surface water which has, as the absorbent material, a material comprising an absorbent backing and a reinforcing layer on the outer face of the backing, the reinforcing layer permitting the passage of water into and out of the backing.
  • Such material is able to withstand the stress to which it is subjected in use, even if the machine is motorized. Motorizing the machine provides significant advantages, not only by making the machine easier to operate, but also by making it possible to provide a pump for conveying water from the machine to a tank or drain situated off the playing surface.
  • backing preferably comprises a foam material, such as a synthetic plastics or rubber foam.
  • the reinforcing layer may be bonded to the " backing by welding or by an adhesive.
  • the reinforcing layer may comprise pervious material such as open weave plastics material, similar to that used for scouring cloths.
  • the reinforcing layer may be in the form of netting which may be made from plastics or rubber.
  • the netting is preferably continuously molded so that the filaments are integrally joined at their intersections. The cross-section of each
  • OMPI filament preferably has a flat portion for contact with the backing.
  • the pitch of the net may, for example, be in the range 4 to 5 centimetres, and the width of the filaments may be approximately 2 millimetres.
  • Figure 1 is .a side view of a machine suitable for clearing surface water from playing fields
  • FIG. 2 is a diagrammatic perspective view of the liquid-absorbent element of the machine of Figure
  • Figure 3 is a plan view of the liquid absorbent element of Figure 3.
  • Figure 4 shows three alternative cross-sections of the reinforcing layer shown in Figures 2 and 3.
  • the machine shown " in Figure 1 comprises a frame 2 in which a roller 4 is supported.
  • the roller 4 is powered by a motor 6.
  • a small-diameter roller 8 is provided to give the machine stability, and a handle 10 is provided to enable the machine to be controlled by an operator walking behind it. Suitable controls (not shown) are mounted on the handle 10.
  • the roller 4 is covered by a liquid-absorbent element 12. As is clear from Figure 1, this element 12 is compressed between the roller 4 and the ground by the weight of the machine. It is also compressed by a squeeze roller 14 provided to the rear of the
  • the motor 6 rotates the roller 4 to drive the machine over the area to be cleared.
  • the element 12 rolls over the ground, it is progressively compressed by the ground contact and released.
  • the element 12 moves off the ground at the rear of the roller 4 and is allowed to expand, it draws water from the ground surface.
  • This water is carried by the element 12 as far as the squeezing roller 14, which compresses the element 12 again, squeezing out the water into a trough ⁇ not shown) at the bottom of the frame 2.
  • the water is pumped- from the trough by a pump (not shown), driven by the motor 6, into a tank on the machine or, via a hose, to a tank situated nearby.
  • FIG 2 illustrates schematically one embodiment of the material from which the liquid-absorbing element 12 is made.
  • the element 12 comprises an absorbent backing 15 provided with a reinforcing layer 16.
  • the absorbent backing 15 comprises a resilient synthetic plastics or rubber foam and the reinforcing layer comprises moulded plastics material in the form of netting which is bonded to the backing 15 by welding or by the use of a suitable adhesive.
  • the thickness of the backing 15 is approximately 4 centimetres, and, as shown in Figure 3, the pitch of the netting is preferably in the range 4 to 5 centi ⁇ metres, although for some uses, such as indoor use, the pitch may be about 1 centimetre.
  • Figure 4 shows three possible cross-sections for the filaments of the netting, i.e.
  • the width and height of the filaments is approximately 2 millimetres.
  • the illustrated reinforcing layer 16 other types of material can be used.
  • open weave plastics material may be suitable, in which case the thickness of the reinforcing layer could be in .the range l ⁇ mm to 5 mm. the material would preferably be welded or bonded to the backing 15 over its whole area, but in a manner which does not provide a barrier preventing the passage of water between the reinforcing layer and the backing.
  • the reinforcing layer 16 provides increased resistance to damage to the relatively fragile backing 15 from, for example, stones and other sharp objects on the ground, and inhibits the propagation of cuts and tears in the backing 15. Resistance to wear from scuffing is also improved. Furthermore, it is found that the relatively rigid reinforcing layer 16 enables the liquid-absorbing element 12 to penetrate deeper into soft working surfaces such as grass and carpeting so as to increase the pick-up of water from such surfaces
  • machines in accordance with the present invention can be used to absorb liquids other than water, for example in factories and other industrial premises, provided that the compositions of the backing 15 and the reinforcing layer 16 are selected to be compatible with the liquids to be absorbed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)
  • Laminated Bodies (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

A machine for absorbing liquid from a surface such as a playing field comprises a driven roller (4) provided with a liquid-absorbent element (12). The element (12) is made from a foamed plastics or rubber backing (15) provided on its outer periphery with a reinforcing layer (16) comprising an open weave filamentary material or ribs disposed in the form of netting. The reinforcing layer (16) resists wear and scuffing of the foam material and provides improved pick-up of water from the surface being cleared.

Description

A MACHINE FOR REMOVING SURFACE WATER. TECHNICAL FIELD
This invention relates to a machine for removing surface water from, for example, playing fields and other recreational areas.
BACKGROUND OF THE INVENTION*1
Outside sporting events have always suffered from the effects of the weather. Pools of water on a football or cricket pitch, or even a very wet surface of a tennis court of bowling green, may mean the cancel-- lation of a game. The same applies to other sporting events, such as athletics, horse racing or golf. The pressure from players or supporters or the need to earn revenue from paying spectators can mean that an event takes place on a surface which is too wet. This is likely to result in a lowered standard of play with consequent disappointment to spectators, and may also subject the players themselves to undue risks. There is also the danger that the playing surface will be damaged. Underground drainage systems have been used to prevent playing surfaces from becoming -waterlogged. Such systems are expensive to install and are not effective to carry off surface water quickly. Thus sporting fixtures may be affected by rainfall in the 24 hours preceding them. ery large ..pools of deep water can be reduced by conventional pumping systems, but these are not capable of removing
OMPI , VvPO all surface water.
Various proposals have been made for machines which can absorb water from playing surfaces. Such machines are pushed by hand and have a roller covered by absorbent material. The material picks up water from the ground, this water then being discharged from the material into a tank provided in the machine. These machines have not met with success, because the effort of pushing the machine along, particularly when the tank is full, is too great. Also, the absorbent material is liable to damage. SUMMARY OF THE PRESENT INVENTION
The present invention provides a machine for . removing surface water which has, as the absorbent material, a material comprising an absorbent backing and a reinforcing layer on the outer face of the backing, the reinforcing layer permitting the passage of water into and out of the backing.
Such material is able to withstand the stress to which it is subjected in use, even if the machine is motorized. Motorizing the machine provides significant advantages, not only by making the machine easier to operate, but also by making it possible to provide a pump for conveying water from the machine to a tank or drain situated off the playing surface.
'■'he -absorbent.backing preferably comprises a foam material, such as a synthetic plastics or rubber foam. The reinforcing layer may be bonded to the "backing by welding or by an adhesive. The reinforcing layer may comprise pervious material such as open weave plastics material, similar to that used for scouring cloths.
Alternatively, the reinforcing layer may be in the form of netting which may be made from plastics or rubber. The netting is preferably continuously molded so that the filaments are integrally joined at their intersections. The cross-section of each
OMPI filament preferably has a flat portion for contact with the backing. The pitch of the net may, for example, be in the range 4 to 5 centimetres, and the width of the filaments may be approximately 2 millimetres.
Although the machine in accordance with the present invention was devised primarily for clearing surface water from recreational areas such as playing fields, cricket pitches and the like, it can also be utilized, for example for clearing liquids other than water from, for example, factory premises. «■' BRIEF DESCRIPTION OF THE DRAWINGS
For a better understanding of the present invention and to show how it may be carried into effect, reference will now be made, by way of example, to the accompanying drawings, in which:
Figure 1 is .a side view of a machine suitable for clearing surface water from playing fields;
Figure 2 is a diagrammatic perspective view of the liquid-absorbent element of the machine of Figure
1; ■
Figure 3 is a plan view of the liquid absorbent element of Figure 3; and
Figure 4 shows three alternative cross-sections of the reinforcing layer shown in Figures 2 and 3.
The machine shown "in Figure 1 comprises a frame 2 in which a roller 4 is supported. The roller 4 is powered by a motor 6. A small-diameter roller 8 is provided to give the machine stability, and a handle 10 is provided to enable the machine to be controlled by an operator walking behind it. Suitable controls (not shown) are mounted on the handle 10.
The roller 4 is covered by a liquid-absorbent element 12. As is clear from Figure 1, this element 12 is compressed between the roller 4 and the ground by the weight of the machine. It is also compressed by a squeeze roller 14 provided to the rear of the
OMPI y. I?0 roller 4 .
In operation, the motor 6 rotates the roller 4 to drive the machine over the area to be cleared. As the element 12 rolls over the ground, it is progressively compressed by the ground contact and released. As the element 12 moves off the ground at the rear of the roller 4 and is allowed to expand, it draws water from the ground surface. This water is carried by the element 12 as far as the squeezing roller 14, which compresses the element 12 again, squeezing out the water into a trough {not shown) at the bottom of the frame 2. the water is pumped- from the trough by a pump (not shown), driven by the motor 6, into a tank on the machine or, via a hose, to a tank situated nearby.
Figure 2 illustrates schematically one embodiment of the material from which the liquid-absorbing element 12 is made. The element 12 comprises an absorbent backing 15 provided with a reinforcing layer 16. The absorbent backing 15 comprises a resilient synthetic plastics or rubber foam and the reinforcing layer comprises moulded plastics material in the form of netting which is bonded to the backing 15 by welding or by the use of a suitable adhesive. The thickness of the backing 15 is approximately 4 centimetres, and, as shown in Figure 3, the pitch of the netting is preferably in the range 4 to 5 centi¬ metres, although for some uses, such as indoor use, the pitch may be about 1 centimetre. Figure 4 shows three possible cross-sections for the filaments of the netting, i.e. a triangular cross-section A, a square cross-section B and a generally square cross- section with a rounded radially outer contour C. In each case, there is a flat surface 18 to ensure good contact between the netting 16 and the backing 15. The filaments constitute ribs which project outwardly from the backing 15.
OMPI In each case, the width and height of the filaments is approximately 2 millimetres.
Instead of the illustrated reinforcing layer 16, other types of material can be used. For example, open weave plastics material may be suitable, in which case the thickness of the reinforcing layer could be in .the range l\ mm to 5 mm. the material would preferably be welded or bonded to the backing 15 over its whole area, but in a manner which does not provide a barrier preventing the passage of water between the reinforcing layer and the backing.
The reinforcing layer 16 provides increased resistance to damage to the relatively fragile backing 15 from, for example, stones and other sharp objects on the ground, and inhibits the propagation of cuts and tears in the backing 15. Resistance to wear from scuffing is also improved. Furthermore, it is found that the relatively rigid reinforcing layer 16 enables the liquid-absorbing element 12 to penetrate deeper into soft working surfaces such as grass and carpeting so as to increase the pick-up of water from such surfaces
Although the present invention has been described with particular reference to a motorised machine for clearing relatively large areas such as playing fields, machines in accordance with the present invention can be used to absorb liquids other than water, for example in factories and other industrial premises, provided that the compositions of the backing 15 and the reinforcing layer 16 are selected to be compatible with the liquids to be absorbed.

Claims

1. A machine for removing liquid from a surface, the machine comprising a liquid absorbent element (12) mounted for movement around a circulating path and for engagement with the surface at one region of the circulating path to absorb liquid from the surface, removal means (14) being provided at another location of the circulating path for removing absorbed liquid from the absorbent element (12), characterized in that the material comprises an absorbent backing (18) and a reinforcing layer (16) provided on the outer face of the backing (15) , the reinforcing layer permitting the passage of liquid into and out of the backing.
2. A machine as claimed in claim 1, characterized in that the liquid absorbent element (12) comprises a generally cylindrical cover on a rigid roller (4) of the machine.
3. A machine as claimed in claim 1, characterized in that the removal means (14) comprises a squeeze roller for compressing the liquid absorbent element.
4. A machine as claimed in claim 1, characterized in that a tank is provided for receiving liquid removed from the absorbent element.
5. A machine as claimed in claim 1, characterized in that a pump is provided for discharging liquid removed from the absorbent material to a location away from the machine.
.
6. A machine as claimed in claim 1, characterized in that a motor (6) is provided for driving the liquid absorbent element around the circulating path.
7. A machine as claimed in claim 1, characterized in that the backing comprises a resilient foam.
8. A machine as claimed in claim 1, characterized in that the reinforcing layer comprises ribs projecting outwardly from the backing and disposed in the form of netting.
9. A machine as claimed in claim 1, characterized in that the reinforcing layer comprises an open weave filamentary material.
OMPI
PCT/GB1983/000024 1982-02-03 1983-02-01 A machine for removing surface water WO1983002789A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU12219/83A AU1221983A (en) 1982-02-03 1983-02-01 A machine for removing surface water
JP83500719A JPS59500178A (en) 1982-02-03 1983-02-01 surface water removal machine
MC83GB8300024D MC1588A1 (en) 1982-02-03 1983-02-01 MACHINE FOR REMOVING SURFACE WATER
DK455583A DK455583A (en) 1982-02-03 1983-10-03 MACHINE TO REMOVE LIQUID FROM A SURFACE
FI833592A FI833592A0 (en) 1982-02-03 1983-10-03 MASKIN FOER AVLAEGSNANDE AV YTVATTEN

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8203086820203 1982-02-03
GB08203086A GB2114508A (en) 1982-02-03 1982-02-03 Liquid-absorbent material

Publications (1)

Publication Number Publication Date
WO1983002789A1 true WO1983002789A1 (en) 1983-08-18

Family

ID=10528088

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1983/000024 WO1983002789A1 (en) 1982-02-03 1983-02-01 A machine for removing surface water

Country Status (7)

Country Link
EP (1) EP0099916A1 (en)
JP (1) JPS59500178A (en)
DK (1) DK455583A (en)
FI (1) FI833592A0 (en)
GB (1) GB2114508A (en)
NO (1) NO833514L (en)
WO (1) WO1983002789A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984000988A1 (en) * 1982-09-09 1984-03-15 Motomop Ltd A machine for removing liquid from a surface
EP0328942A1 (en) * 1988-02-15 1989-08-23 INTERATOM Gesellschaft mit beschränkter Haftung Suction cylinder
US4989293A (en) * 1989-05-15 1991-02-05 Murali Bashyam Tennis court drying machine
CN110205967A (en) * 2019-06-14 2019-09-06 阿克苏浩瀚工程咨询有限公司 A kind of construction hollow landform ponding removal device

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB371524A (en) * 1931-02-23 1932-04-28 Frederick George Highfield Apparatus for removing moisture from and for rolling turfed surfaces and such like
GB376585A (en) * 1931-10-23 1932-07-14 Frederick George Highfield Apparatus for removing moisture from and for rolling turfed surfaces and such like
GB405796A (en) * 1932-10-07 1934-02-15 Albert John Wesley Luttrell Improved implement for removing moisture and water from turf or hard surfaces
US3051973A (en) * 1958-06-12 1962-09-04 Francis G Jacques Absorptive earth-drying apparatus
GB942338A (en) * 1961-03-29 1963-11-20 Forge Craft Ltd Improvements in or relating to moisture collecting apparatus for removing moisture from a surface over which said apparatus is passed
US3617552A (en) * 1970-03-18 1971-11-02 Standard Oil Co Oil-water separating process
DE2025943A1 (en) * 1970-05-27 1971-12-09 Jäntschi, Karl; Maucher, Eugen; 8000 München Device for absorbing water from leveled surfaces
GB1485414A (en) * 1975-05-16 1977-09-14 Colebrook M Devices for removing liquids from surfaces
FR2415692A1 (en) * 1978-01-25 1979-08-24 Piat Henri Collector for pools of water on sports courts and pitches - has scraper on frame mounting sponge and pressure rollers

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB371524A (en) * 1931-02-23 1932-04-28 Frederick George Highfield Apparatus for removing moisture from and for rolling turfed surfaces and such like
GB376585A (en) * 1931-10-23 1932-07-14 Frederick George Highfield Apparatus for removing moisture from and for rolling turfed surfaces and such like
GB405796A (en) * 1932-10-07 1934-02-15 Albert John Wesley Luttrell Improved implement for removing moisture and water from turf or hard surfaces
US3051973A (en) * 1958-06-12 1962-09-04 Francis G Jacques Absorptive earth-drying apparatus
GB942338A (en) * 1961-03-29 1963-11-20 Forge Craft Ltd Improvements in or relating to moisture collecting apparatus for removing moisture from a surface over which said apparatus is passed
US3617552A (en) * 1970-03-18 1971-11-02 Standard Oil Co Oil-water separating process
DE2025943A1 (en) * 1970-05-27 1971-12-09 Jäntschi, Karl; Maucher, Eugen; 8000 München Device for absorbing water from leveled surfaces
GB1485414A (en) * 1975-05-16 1977-09-14 Colebrook M Devices for removing liquids from surfaces
FR2415692A1 (en) * 1978-01-25 1979-08-24 Piat Henri Collector for pools of water on sports courts and pitches - has scraper on frame mounting sponge and pressure rollers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Petroleum Engineer International, Vol. 49, No. 3, March 1977, The Petroleum Engineer Publishing Co. (Dallas, Texas, US) "Zero-Relative-Velocity Oil Skimmer", pages 11,12,14, see page 11, lines 20-30; figures 2,3; page 12, right-hand column, lines 2-5, 11-13, 16-18; page 14, left-hand column, lines 4-8 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984000988A1 (en) * 1982-09-09 1984-03-15 Motomop Ltd A machine for removing liquid from a surface
EP0328942A1 (en) * 1988-02-15 1989-08-23 INTERATOM Gesellschaft mit beschränkter Haftung Suction cylinder
US4989293A (en) * 1989-05-15 1991-02-05 Murali Bashyam Tennis court drying machine
CN110205967A (en) * 2019-06-14 2019-09-06 阿克苏浩瀚工程咨询有限公司 A kind of construction hollow landform ponding removal device

Also Published As

Publication number Publication date
FI833592A (en) 1983-10-03
NO833514L (en) 1983-09-28
DK455583D0 (en) 1983-10-03
GB2114508A (en) 1983-08-24
FI833592A0 (en) 1983-10-03
EP0099916A1 (en) 1984-02-08
DK455583A (en) 1983-10-03
JPS59500178A (en) 1984-02-02

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