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1. (WO2010088715) DEVICE FOR COLLECTION OF DEBRIS
注意: このテキストは、OCR 処理によってテキスト化されたものです。法的な用途には PDF 版をご利用ください。

THE CLAIMS:

1. A device for collecting debris from a ground surface, comprising a flexible generally planar member with an opening therethrough such that when the device is laid on and forwardly moved over the ground surface debris on the ground surface passes upwardly through the opening onto a collection surface of the device, the device having an inclined surface extending upwardly and rearwardly from a transverse edge and which forms a rear edge of the opening and having a transversely extending recess such that at least part of the debris passing upwardly through the opening to the collection surface progresses over said inclined surface by movement to the recess, capture in the recess, and thence movement from the recess to the collection surface.

2. A device as claimed in claim 1 wherein said recess extends substantially from side to side of said inclined surface.

3. A device as claimed in claim or claim 2 wherein said recess is one of a plurality of said transversely extending recesses on said inclined surface, spaced in a lengthwise direction of the device.

4. A device as claimed in claim 3 wherein substantially all of said surface contains said transversely extending recesses.

5. A device as claimed in claim 3 or claim 4 wherein each said recess is formed between transverse upstanding walls on a pick-up portion of the device on which said inclined surface is formed.

6. A device as claimed in claim 5 wherein a rear part of each recess is formed by a first upstanding forward surface of a respective rearwardly disposed said wall and a forward part of each recess is formed by an upstanding rear surface of a respective forwardly disposed said wall.

7. A device as claimed in claim 6 wherein each said wall has a respective said first surface and a respective second surface.

8. A device as claimed in claim 7 wherein the first surfaces successively rearwardly of the device progress incrementally from lesser to greater inclination.

9. A device as claimed in claim 7 or claim 8 wherein the first surfaces successively rearwardly of the device progress incrementally from concavity to convexity.

10. A device as claimed in any one of claims 7 to 9 wherein said first surface and second surface of each said wall at least substantially meet at an apex of that wall.

11. A device as claimed in claim 10 wherein the apices of said walls are arranged in a linear array.

12. A device as claimed in claim 7 wherein bases of said walls are arranged in a linear array.

13. A device as claimed in any one of claims 10 to 12 wherein recesses are of substantially the same cross-sectional form.

14. A device as claimed 10, wherein said apices of said walls are arranged on a sinuous array.

15. A device as claimed in any one of claims 8 to 10 and 14 wherein bases of said walls are arranged on a sinuous array.

16. A device as claimed in claims 12 and 13 wherein said arrays are substantially parallel.

17. A device as claimed in claims 14 and 15 wherein said arrays are substantially parallel.

18. A device as claimed in claim any preceding claim having a further transversely extending recess at a forward part of said collection surface arranged whereby in use of the device at least part of the debris moving rearwardly from said inclined surface to the collection surface progresses by movement to the further recess, capture in the recess, and thence movement from the further recess to the collection surface.

19. A device as claimed in claim 18, wherein said further recess is one of a plurality of further recesses spaced in the lengthwise direction of the device.

20. A device as claimed in claim 18 or claim 19 wherein the or each further recess is defined between further upstanding transverse walls of the device.

21 A device as claimed in claim 20 wherein the further walls extend substantially from side to side of the device.

22. A device as claimed in any one of claims 18 to 20 wherein the or each recess and the or each further recess is in the range 5-25 mm deep.

23. A device as claimed in any preceding claim wherein the planar member defines a section thereof, in use being behind the opening, a surface of which section is uppermost in the condition for use of the device and forms the collection surface.

24. A device as claimed in claim 23 wherein the section has an underside formed of conformable material so that, in use of the device, the underside may locally conform to undulations in the ground surface.

25. A device as claimed in claim 24 or claim 25 wherein the section is formed from a flexible layer having depending bristles.

26. A device as claimed in claim 5 or any one of claims 6 to 25 as appended directly or indirectly thereto wherein a rearmost said wall on said inclined surface forms a barrier positioned whereby, in use, debris passing upwardly through the opening passes upwardly over the barrier and then downwardly to the collection surface, the barrier at least partially obstructing movement of collected debris on the collection surface back into the opening under deceleration of the device as it is forwardly moved over the ground surface.

27. A debris collection device substantially as herein described with reference to the accompanying drawings.