Extruded multiwall tubular structure
AssigneeGyre Innovations LP
InventorsStephen Mettee, II, Clay Tully, Stephen W. Tansey
Life of this patent
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Abstract
An extruded multiwall tubular structure formed from extrusion dies, the structure includes a core having a longitudinal axis and a first wall surrounding the core. At least one form extends helically relative to the longitudinal axis and between the core and the outer wall in supporting relationship therewith. At least the first wall and the at least one form lack residual strains, as a result of stress created by the manufacturing process, subsequent the structure exiting the extrusion dies. The core is concentric with the first wall.
Claims20
An extruded multiwall tubular structure formed from extrusion dies, the structure comprising:
- a thermoplastic material or a metal material;
- a core having a longitudinal axis and having an opening extending along its length;
- a first outer wall surrounding the core;
- and
- at least one form extending helically relative to the longitudinal axis and between the core and the first outer wall in supporting relationship therewith;
- wherein at least the first outer wall and the at least one form lack residual strains, as a result of stress created by the manufacturing process, subsequent to the structure exiting the extrusion dies;
- wherein the core is concentric with the first outer wall;
- wherein the structure is rigid.
An extruded multiwall tubular structure formed from extrusion dies, the structure comprising:
- a thermoplastic material or a metal material;
- a core having a longitudinal axis and having an opening extending along its length;
- a first outer wall surrounding the core;
- and
- at least one form extending helically relative to the longitudinal axis and between the core and the first outer wall in supporting relationship therewith;
- wherein the first outer wall, the at least one form and the core are simultaneously directed into uniform rotational movement about the longitudinal axis as a result of material flowed through the extrusion dies;
- wherein at least the first outer wall and the at least one form lack residual strains, as a result of stress created by the manufacturing process, subsequent to the structure exiting the extrusion dies;
- wherein the core is concentric with the first outer wall;
- wherein the structure is rigid.
An extruded multiwall tubular structure formed from extrusion dies for a conveyor system, the structure comprising:
- a thermoplastic material or a metal material;
- a circular cylindrical core having a center longitudinal axis and having an opening extending along its length;
- a first outer wall concentrically surrounding the core;
- at least one form extending helically relative to the longitudinal axis and between the core and the first outer wall in supporting relationship therewith;
- wherein the first outer wall, the at least one form and the core are simultaneously directed into rotational movement about the longitudinal axis as a result of material flowed through the extrusion dies;
- wherein at least the first outer wall and the at least one form lack residual strains, as a result of stress created by the manufacturing process, subsequent to the structure exiting the extrusion dies;
- wherein the core is concentric with the first outer wall;
- wherein the structure is rigid.
Dependencies are inferred from the claim text.