# US 2017/0254086 A1 · Weldless rebar chairs > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0254086 A1 - Document ID: US20170254086A1 - Status: Published application - Kind: A1 - Application number: 15/412,609 - Filed: 2017-01-23 - Published: 2017-09-07 - Earliest claimed: 2016-03-02 - Inventors: JAMES LARKIN - Web page: https://patentgrep.com/patent/US20170254086A1 ## CPC - E04C 5/18: {Spacers} of metal or substantially of metal {(E04C5/168 takes precedence)} - E04C 5/168: {Spacers connecting parts for reinforcements and spacing the reinforcements from the form} - E04C: STRUCTURAL ELEMENTS; BUILDING MATERIALS (for bridges E01D; specially designed for insulation or other protection E04B; elements used as building aids E04G; for mining E21; for tunnels E21D; structural elements with broader range of application than for building engineering F16, particularly F16S) ## Abstract A form for creating a weldless rebar chair has an elongate rod arranged along a predetermined direction, said rod being formed into at least a plurality of partial elongate loops spaced from each other along the predetermined direction and arranged in a common plane defined by the elongate rod and the elongate loops. A method of producing a weldless rebar chair comprising the steps of arranging an elongate rod along the predetermined direction and bending it to create the elongate loops spaced and bending the loops at transition points to form intermediate portions arranged in a common plane and free ends that extend in directions normal to the plane, alternate free ends being bent in opposite directions and having lengths that are substantially equal to provide legs that can be placed on a surface to stabilize the rebar chairs. ## Claims ### Claim 1 A form for creating a weld-less rebar chair comprising a continuous elongate rod arranged along a predetermined direction, said rod being formed into at least a plurality of loops extending substantially equal distances in a common direction normal to said predetermined direction spaced from each other along said predetermined direction and arranged in a common plane defined by said elongate rod and said elongate loops. ### Claim 2 (depends on 1) A form as defined in claim 1, wherein said loops are elongate loops. ### Claim 3 (depends on 1) A form as defined in claim 1, wherein said loops are open loops. ### Claim 4 (depends on 1) A form as defined in claim 1, wherein said loops are closed loops. ### Claim 5 (depends on 1) A form as defined in claim 1, wherein said elongate rod is made of ASTM A1035 CS Grade 100 steel. ### Claim 6 (depends on 1) A form as defined in claim 1, wherein said elongate rod is made of ASTM A1035 CS Grade 120 steel. ### Claim 7 (depends on 1) A form as defined in claim 1, wherein said elongate rod is made of steel that achieves yield strength between 100 and 120 Ksi of the ASTM A1035 specification while maintaining ductility and tensile-to-yield ratio above 1.25. ### Claim 8 A weld-less rebar chair comprising an elongate rod arranged along a predetermined direction, said rod being formed into at least a plurality of loops extending substantially equal distances in a common direction normal to said predetermined direction spaced from each other along said predetermined direction, said loops having free ends and intermediate portions between said free ends and said elongate rod, said intermediate portions being arranged in a common plane defined by said elongate rod and said intermediate portions and said free ends being bent out of said common plane in directions generally normal to said intermediate portions, alternate free ends being bent in opposite orthogonal directions in relation to said common plane, said intermediate portions having lengths within said common plane that are substantially equal to provide legs that can be placed on a surface to stabilize the rebar chair. ### Claim 9 (depends on 8) A weld-less rebar chair as defined in claim 8, wherein said loops are elongate loops. ### Claim 10 (depends on 8) A weld-less rebar chair as defined in claim 8, wherein said loops are open loops. ### Claim 11 (depends on 8) A weld-less rebar chair as defined in claim 8, wherein said loops are closed loops. ### Claim 12 (depends on 8) A weld-less rebar chair as defined in claim 8, wherein said elongate rod is made of ASTM A1035 CS Grade 100 steel. ### Claim 13 (depends on 8) A weld-less rebar chair as defined in claim 8, wherein said elongate rod is made of ASTM A1035 CS Grade 120 steel. ### Claim 14 (depends on 8) A weld-less rebar chair as defined in claim 8, wherein said elongate rod is made of steel that achieves yield strength between 100 and 120 Ksi of the ASTM A1035 specification while maintaining ductility and tensile-to-yield ratio above 1.25. ### Claim 15 A method of producing a form for creating a weld-less rebar chair comprising the steps of selecting a length of an elongate continuous rod and arranging it along a predetermined direction; bending said rod to create a plurality of loops extending substantially equal distances in a common direction normal to said predetermined direction spaced from each other along said predetermined direction in a common plane defined by said elongate rod and said elongate loops. ### Claim 16 (depends on 15) A method as defined in claim 15, wherein said loops are open loops. ### Claim 17 (depends on 15) A method as defined in claim 15, wherein said loops are closed loops. ### Claim 18 (depends on 15) A method as defined in claim 15, wherein said elongate rod is made of ASTM A1035 CS Grade 100 steel. ### Claim 19 (depends on 15) A method as defined in claim 15, wherein said elongate rod is made of ASTM A1035 CS Grade 120 steel. ### Claim 20 (depends on 15) A method as defined in claim 15, wherein said elongate rod is made of steel that achieves yield strength between 100 and 120 Ksi of the ASTM A1035 specification while maintaining ductility and tensile-to-yield ratio above 1.25. ### Claim 21 A method of producing a weld-less rebar chair comprising the steps of selecting a length of an elongate continuous rod and arranging it along a predetermined direction; bending said rod to create at least a plurality of loops extending substantially equal distances in a common direction normal to said predetermined direction spaced from each other along said predetermined direction, bending said loops at transition points to form intermediate portions arranged in a common plane defined by said elongate rod and said intermediate portions and free ends that extend out of said common plane in directions generally normal to said intermediate portions, alternate free ends being bent in opposite orthogonal directions in relation to said common plane, said intermediate portions having lengths within said common plane that are substantially equal to provide legs that can be placed on a surface to stabilize the rebar chairs. ### Claim 22 A weld-less rebar chair comprising an elongate rod arranged along a predetermined direction and defining an axis, said rod being formed into at least a plurality of loops extending substantially equal distances in a direction normal to said predetermined direction spaced from each other along said predetermined direction, alternate loops being angularly offset relative to a plane passing through said axis and each forming angles with said plane less than 90°. ### Claim 23 A method of producing a weld-less rebar chair comprising the steps of selecting a length of an elongate continuous rod and arranging it along a predetermined direction and defining an axis; bending said rod to create at least a plurality of loops extending substantially equal distances in a direction normal to said predetermined direction spaced from each other along said predetermined direction; and angularly offsetting alternate loops about said axis to opposite sides of a plane passing through said axis and each forming angles with said plane less than 90°.