A ground water drainage system

(19)

(11)

EP 1 416 099 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	01.12.2004 Bulletin 2004/49

(43)	Date of publication A2:
	06.05.2004 Bulletin 2004/19

(21)	Application number: 03256923.8

(22)	Date of filing: 31.10.2003

(51)	International Patent Classification (IPC)⁷: E03F 1/00

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
	Designated Extension States:
	AL LT LV MK

(30)

Priority:

31.10.2002 GB 0225374
11.04.2003 GB 0308445

(71)	Applicant: Polypipe Civils Limited
	Loughborough, Leicestershire LE11 ORE (GB)

(72)	Inventors:
	Ramella, Stuart Edward Alan Loughborough Leics LE11 4NX (GB) Coupe, Kevin John Ibstock Leics LE6 7HU (GB) Shingleton, Jason Alan Tamworth Staffs B77 1HS (GB)

(74)	Representative: Johnson, Terence Leslie
	Marks & Clerk Incorporating Edward Evans Barker, Clifford's Inn, Fetter Lane London EC4A 1BZ London EC4A 1BZ (GB)

(54)	A ground water drainage system

(57) The invention relates to a ground water handling or attenuation system comprising at least two vertically stackable perforated cells 201, 202, each with an open major surface which are joined together in open-face to open-face relation by a grip 205, there being in the embodiment two grids 20t per assembly. Each cell has upstanding columns 203 of predominantly female form into which male spigots 206 of the grid(s) engage with a push fit, there being releasable locking means 208 of some spigots 206 which engage behind internal locking means of respective columns.

Search report