Prestressed concrete units and method of manufacture

(19)

(11)

EP 1 362 680 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	27.04.2005 Bulletin 2005/17

(43)	Date of publication A2:
	19.11.2003 Bulletin 2003/47

(21)	Application number: 03252950.5

(22)	Date of filing: 12.05.2003

(51)	International Patent Classification (IPC)⁷: B28B 23/04, B28B 7/00

(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:

17.05.2002 GB 0211356

(71)	Applicant: Poundfield Products Limited
	Ipswich, Suffolk IP6 8QG (GB)

(72)	Inventor:
	Jardine, Mark Hamilton East Bergholt, Colchester CO7 6RJ (GB)

(74)	Representative: Simons, Alison Diane et al
	Dummett Copp 25 The Square Martlesham Heath Ipswich, Suffolk, IP5 3SL Ipswich, Suffolk, IP5 3SL (GB)

(54)	Prestressed concrete units and method of manufacture

(57) This invention relates to prestressed concrete units, to a method of manufacture of prestressed concrete units and to a mould system for use in such a method. The invention provides a method of manufacturing a prestressed concrete unit using a mould system comprising an elongate mould containing at least one prestressed element and an elongate hopper having an aperture, comprising the steps of locating at least one reinforcing element in a substantially perpendicular orientation to said mould; filling the elongate mould with concrete to form a first portion of the unit; locating the hopper over said reinforcing element in a substantially perpendicular orientation with the mould; and filling the hopper with concrete such that the concrete flows through the aperture to contact the concrete of the first portion.

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