# US 2019/0376241 A1 · Artificial turf system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0376241 A1 - Document ID: US20190376241A1 - Status: Published application - Kind: A1 - Application number: 16/551,635 - Filed: 2019-08-26 - Published: 2019-12-12 - Earliest claimed: 2015-03-09 - Assignees: 4427017 Canada Inc. - Applicants: 4427017 Canada Inc. - Inventors: Frédéric VACHON - Web page: https://patentgrep.com/patent/US20190376241A1 ## CPC - E01C 13/08: Surfaces simulating grass {; Grass-grown sports grounds (grass-like surfaces for skiing E01C13/12)} - D06N 7/0065: {characterised by the pile} - E01C: CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR (forming roads or like surfaces by compacting or grading snow or ice E01H) - D06N: WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR ## Abstract An artificial turf system for installation over a receiving surface. The artificial turf system comprising: a sheet member made of a flexible material, the sheet member defining a first surface for interfacing with the receiving surface and a second surface; primary yarns made of straight fibers backstitched in and threaded through the sheet member and upwardly extending from the sheet member to a first elevation; and secondary yarns made of textured fibers backstitched in and threaded through the sheet member and upwardly extending from the sheet member at a second elevation less than the first elevation which is caused by a difference in texture between the primary yarns and the secondary yarns, wherein the secondary yarns are more rigid than the primary yarns, and wherein the primary yarns and the secondary yarns have ends which are cut after being threaded through the sheet member. ## Claims ### Claim 1 An artificial turf system for installation over a receiving surface, the artificial turf system comprising: a sheet member made of a flexible material, the sheet member defining a first surface for interfacing with the receiving surface and a second surface; primary yarns made of straight fibers backstitched in and threaded through the sheet member and upwardly extending from the second surface of the sheet member to a first elevation; and secondary yarns made of textured fibers backstitched in and threaded through the sheet member and upwardly extending from the second surface of the sheet member at a second elevation less than the first elevation defining a difference in elevation which is caused by a difference in texture between the primary yarns and the secondary yarns, wherein the secondary yarns are more rigid than the primary yarns, and wherein the primary yarns and the secondary yarns have ends which are cut after being threaded through the sheet member. ### Claim 2 (depends on 1) The artificial turf system of claim 1, wherein the material used for the primary yarns is not the same material which is used for the secondary yarns, wherein the material used for the secondary yarns is more rigid than the material used for the primary yarns. ### Claim 3 (depends on 1) The artificial turf system of claim 1, wherein the secondary yarns are textured, and wherein the textured fibers comprise crimped fibers. ### Claim 4 (depends on 1) The artificial turf system of claim 1, wherein the secondary yarns represent more than 50% in weight of the primary and secondary yarns together. ### Claim 5 (depends on 1) The artificial turf system of claim 1, wherein combined yarns composed of the primary and secondary yarns are backstitched in parallel equally spaced apart rows on the sheet material. ### Claim 6 (depends on 1) The artificial turf system of claim 1, wherein the mass of the secondary yarns is greater than the mass of the primary yarns. ### Claim 7 (depends on 1) The artificial turf system of claim 1, wherein the mass of the secondary yarns is in a range between 15,001 and 20,000 deniers. ### Claim 8 (depends on 1) The artificial turf system of claim 1, wherein the primary yarns and the secondary yarns have respectively a length, and wherein the length of secondary yarns is greater than the length of primary yarns. ### Claim 9 (depends on 1) The artificial turf system of claim 1, wherein a ratio of the second elevation over the first elevation is smaller than 75%. ### Claim 10 An artificial turf system for installation over a receiving surface, the artificial turf system comprising: a sheet member made of a flexible material, the sheet member defining a first surface for interfacing with the receiving surface, and a second surface; a plurality of primary yarns being backstitched to the sheet member at primary backstitches, with the primary yarns raising from the primary backstitches away from the second surface to a first elevation; and a plurality of secondary yarns defining an underturf, the secondary yarns being backstitched to the sheet member at secondary backstitches, wherein the secondary backstitches are distributed in-between the primary backstitches, wherein the secondary yarns extend from the secondary backstitches up to a second elevation lower than the first elevation, wherein the secondary yarns extend sideways in random directions, and wherein the secondary yarns intertwine with other secondary yarns. ### Claim 11 (depends on 10) The artificial turf system of claim 10, wherein the primary yarns comprise a lower section rising from the sheet member under the second elevation, and wherein the underturf provides a least partial support to the lower section of the primary yarns thereby impeding the lower section of the primary yarns from curving, bending or crooking. ### Claim 12 (depends on 10) The artificial turf system of claim 10, wherein the primary yarns are made of straight fibers. ### Claim 13 (depends on 10) The artificial turf system of claim 10, wherein the secondary yarns are made of curved fibers. ### Claim 14 (depends on 10) The artificial turf system of claim 10, wherein the plurality of secondary yarns represents more than 50% in weight of the sum of the plurality of primary and secondary yarns together. ### Claim 15 (depends on 10) The artificial turf system of claim 10, wherein the secondary yarns are more rigid than the primary yarns. ### Claim 16 (depends on 10) The artificial turf system of claim 10, wherein the secondary yarns are textured, and wherein the textured fibers comprise crimped fibers. ### Claim 17 (depends on 10) The artificial turf system of claim 10, wherein the primary yarns and the secondary yarns have respectively a length, and wherein the length of secondary yarns is greater than the length of primary yarns. ### Claim 18 (depends on 10) The artificial turf system of claim 10, wherein a ratio of the second elevation over the first elevation is smaller than 75%. ### Claim 19 (depends on 10) The artificial turf system of claim 10, wherein the primary yarns and the secondary yarns have respectively a width, and wherein the width of the primary yarns is greater than the width of the secondary yarns. ### Claim 20 (depends on 10) The artificial turf system of claim 10, wherein the primary yarns and the secondary yarns have respectively a thickness, and wherein the thickness of the secondary yarns is equal or greater than the width of the primary yarns.