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US 4,082,120 AGranted
Method of producing tubular lattice reinforcement for reinforced concrete tubular pipe having a socket at one end thereof
AssigneeTrefilunion
InventorMaurice Francois
Life of this patent
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Abstract
A method of producing a tubular lattice reinforced concrete pipe having a socket at one end including first providing a flat rectangular lattice of longitudinal and transverse members connected at their crossing points, and then forming the flat lattice into a tube; the transverse members are highly ductile and stretchable adjacent one end and this end is expanded to form the socket portion of the reinforcement.
Claims1
A method of producing a tubular lattice reinforcement for reinforced concrete tubular pipe having a socket at one end thereof, the method comprising:
- providing a flat lattice of longitudinal and transverse members connected together at their crossing points, the transverse members adjacent one end of the lattice being highly ductile and stretchable, forming said lattice into a tubular member, and expanding one end of the tubular member containing the ductile and stretchable transverse members to form the socket portion of the reinforcement.
Dependencies are inferred from the claim text.