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US 2024/0189882 A1Published application
Pipe bending head
AssigneeSustainable Pipeline Systems Ltd.
InventorAndrew STEVENSON
Life of this patent
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Abstract
A bending apparatus for forming a helical strip of material. The bending apparatus comprises at least one bending head and is arranged to deform a strip of material into a helical form by applying a stress to a ridge running longitudinally along the strip of material to provide a plastic deformation of the ridge. The helical form of the helical strip of material is a permanent distortion due to the deformation of the ridge applied by the at least one bending head.
Claims12
A bending apparatus for forming a helical strip of material, wherein
- the bending apparatus comprises at least two balanced bending heads;
- a first bending head being arranged to deform a strip of material into a helical form to form a first helical strip of material by applying a stress to at least one ridge running longitudinally along the strip of material to provide a controlled plastic deformation of the ridge,
- wherein the helical form of the first helical strip of material is a permanent distortion due to the deformation of the at least one ridge applied by the at least one bending head;
- and
- a second bending head being arranged to deform a second strip of material into a helical form to form a second helical strip of material by applying a stress to at least one ridge running longitudinally along the second strip of material to provide controlled plastic deformation of the at least one ridge,
- wherein the first helical strip of material comprises a first asymmetric interlock feature formed by the at least one ridge running longitudinally along the first helical strip of material and the second helical strip of material comprises a second asymmetric interlock feature arranged to engage with the first interlock feature when the second helical strip of material is wrapped around the first helical strip of material, and
- wherein a non-ridge portion of each helical strip of material is deformed into a cylindrical shape by elastic deformation.
4 more elements
A method for forming a helical strip of material, the method comprising:
- at a first bending head of a bending apparatus, receiving a first length of strip material, wherein the first length of strip material comprises at least one ridge along its length and a non-ridge section adjacent to the at least one ridge along its length;
- at the first bending head, plastically deforming the first length of strip material into a helical form by applying a stress to the at least one ridge along the length of the ridge;
- at a second bending head of the bending apparatus, receiving a second length of strip material, wherein the second length of strip material comprises at least one ridge along its length and a non-ridge section adjacent to the at least one ridge along its length;
- at the second bending head, plastically deforming the second length of strip material into a helical form by applying a stress to the at least one ridge along the length of the ridge;
- wherein there is substantially no plastic deformation of the non-ridge sections by the bending head;
- and
- wherein the first and second strips of material have a common central axis when formed into a helical form.
4 more elements
Dependencies are inferred from the claim text.