# US 8,782,984 B2 · Concrete fillable wall formwork assembly with interconnectable formwork elements > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,782,984 B2 - Document ID: US8782984B2 - Status: Granted - Kind: B2 - Application number: 13/691,560 - Filed: 2012-11-30 - Published: 2013-04-11 - Granted: 2014-07-22 - Earliest claimed: 2002-10-18 - Assignees: PolyOne Corporation - Applicants: PolyOne Corporation - Inventors: David S Foell; William M Bjerke - Web page: https://patentgrep.com/patent/US8782984B2 ## CPC - E04B 2/86: made in permanent forms - E04B 2/8629: {with both form leaves and spacers being monolithic} - E04G 11/06: for walls, e.g. curved {end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts}(E04G11/04 takes precedence) - E02D 5/06: Fitted piles or other elements specially adapted for closing gaps between two sheet piles or between two walls of sheet piles - E02D 5/20: Bulkheads or similar walls made of prefabricated parts and concrete, including reinforced concrete, in situ - E04B 2/845: {the form leaf comprising a wire netting, lattice or the like} - E04B 2002/867: {Corner details} - E04B 2002/8676: {Wall end details} - E04B 2002/8688: {Scaffoldings or removable supports therefor} - E04G 11/12: of elements and beams {which are mounted during erection of the shuttering to brace or couple the elements}(E04G11/18 takes precedence) - E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001}) - E04G: SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS - E02D: FOUNDATIONS; EXCAVATIONS; EMBANKMENTS (specially adapted for hydraulic engineering E02B); UNDERGROUND OR UNDERWATER STRUCTURES {(tunnels, tunnelling, mining E21)} ## Abstract A formwork assembly is adapted to receive concrete to produce structures such as wall structures. The formwork includes PVC tubular form elements having recessed female engagement portions. The female engagement portions are adapted to receive respective male engagement portions. An octagonal form element has a female engagement portion positioned at each vertex between adjacent sides. A recessed female engagement portion is closed to the interior of the form element but open to the exterior of the form element. Thus, the form element includes a plurality of vertices open to the exterior. The form elements also include male engagement portions at an open side. Wall panels, corner panels, and joint connectors can also include male engagement portions. The male engagement portions and female engagement portions are adapted to mate to form a formwork arrangement having a substantially flat exterior wall. A formwork assembly can additionally include concrete flow apertures and insulation. ## Claims ### Claim 1 An apparatus comprising: an elongated octagonal tubular form element, wherein the tubular form element includes a tubular boundary, wherein the boundary bounds a longitudinal interior chamber, wherein the tubular form element includes at least one female engagement portion adapted to engagingly receive a male engagement portion, wherein the at least one female engagement portion extends into the interior chamber, wherein the tubular form element includes at least one male engagement portion extending outwardly of the boundary and an insert panel, wherein the panel has at least one substantially straight or flat surface, wherein the panel has two ends and a male engagement portion at each end, and wherein each male engagement portion is adapted to engage a matching female engagement portion on the elongated tubular formwork form element whereby the engagement of the male engagement portions on the insert panel to matching female engagement portions forms a triangular closed area and whereby the engagement of the insert panel forms a substantially flat wall along elongated octagonal tubular form elements to which the insert panel is engaged. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the male engagement portion comprises one or more of an engagement fin, projection, finger or lip. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein the male engagement portion is T-shaped, P-shaped, H-shaped, or Y-shaped. ### Claim 4 (depends on 2) The apparatus of claim 2, wherein the panel has one substantially straight or flat surface and is a formwork wall panel. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the panel has two substantially straight or flat surfaces residing at a perpendicular angle relative to each other and is a formwork corner panel. ### Claim 6 (depends on 3) The apparatus of claim 3, wherein the panel has perforations. ### Claim 7 (depends on 4) The apparatus of claim 4, wherein the panel has perforations. ### Claim 8 (depends on 4) The apparatus of claim 4, wherein the apparatus forms walls of a building. ### Claim 9 An apparatus comprising: an octagonal form element, wherein the form element includes a wall substantially surrounding an interior space, wherein the wall includes at least one opening, wherein the wall includes at least one inwardly extending recessed female engagement portion, wherein the at least one female engagement portion is adapted to receive a male engagement portion, wherein the wall includes at least one outwardly extending male engagement portion, and an insert panel, wherein the panel has at least one substantially straight or flat surface, wherein the panel has two ends and a male engagement portion at each end, and wherein each male engagement portion is adapted to engage a matching female engagement portion on the form element whereby the engagement of the male engagement portions on the insert panel to matching female engagement portions forms a triangular closed area and whereby the engagement of the insert panel forms a substantially flat wall along octagonal form elements to which the insert panel is engaged. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the male engagement portion comprises one or more of an engagement fin, projection, finger or lip. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the male engagement portion is T-shaped, P-shaped, H-shaped, or Y-shaped. ### Claim 12 (depends on 10) The apparatus of claim 10, wherein the panel has one substantially straight or flat surface and is a formwork wall panel. ### Claim 13 (depends on 10) The apparatus of claim 10, wherein the panel has two substantially straight or flat surfaces residing at a perpendicular angle relative to each other and is a formwork corner panel. ### Claim 14 (depends on 11) The apparatus of claim 11, wherein the panel has perforations. ### Claim 15 (depends on 12) The apparatus of claim 12, wherein the panel has perforations. ### Claim 16 (depends on 12) The apparatus of claim 12, wherein the apparatus forms walls of a building. ### Claim 17 A formwork assembly adapted to receive concrete in forming structures, comprising: a plurality of longitudinally elongated octagonal PVC form elements, wherein each form element includes a longitudinal axis, wherein each form element includes a longitudinal interior space, wherein each form element includes a longitudinal open face, wherein each form element includes a plurality of substantially flat exterior wall surfaces, wherein each wall surface is angled relative to an adjacent wall surface, wherein each form element includes a plurality of longitudinal female engagement portions, wherein each female engagement portion joins two adjacent wall surfaces, wherein each female engagement portion is closed to the interior space, wherein each female engagement portion is adapted to receive a male engagement portion, wherein each form element includes a plurality of longitudinal male engagement portions, wherein each male engagement portion extends outwardly from a wall surface, wherein each male engagement portion is adapted to be received by each female engagement portion, a plurality of longitudinally elongated PVC wall panels, wherein each wall panel includes a substantially flat exterior wall surface, wherein each wall panel includes a first end and a second end, wherein each wall panel end includes a wall panel male engagement portion, wherein each wall panel male engagement portion is adapted to be received by each female engagement portion, a plurality of longitudinally elongated PVC corner panels, wherein each corner panel includes substantially perpendicular exterior wall surfaces, wherein each corner panel wall surface is substantially flat, wherein each corner panel includes a first end and a second end, wherein each corner panel end includes a corner panel male engagement portion, wherein each corner panel male engagement portion is adapted to be received by each female engagement portion, wherein the form elements and wall panels and corner panels are adapted to be interconnected to form a formwork having a substantially flat exterior wall surface.