# US 12,759,263 B2 · Abrasion-resistant composite > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,759,263 B2 - Document ID: US12759263B2 - Status: Granted - Kind: B2 - Application number: 18/428,467 - Filed: 2024-01-31 - Published: 2024-07-04 - Granted: 2026-10-13 - Earliest claimed: 2021-08-02 - Assignees: GelSight, Inc. - Applicants: GelSight, Inc. - Inventors: Edward H. Adelson; F. Richard Cottrell - Web page: https://patentgrep.com/patent/US12759263B2 ## CPC - B32B 7/022: Mechanical properties - B32B 27/06: as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08)} - B32B 27/283: {comprising polysiloxanes} - B32B 2250/02: 2 layers - B32B 2307/412: Transparent - B32B 2307/536: Hardness - B32B 2307/54: Yield strength; Tensile strength - B32B 2307/554: Wear resistance - B32B 2307/5825: Tear resistant - B32B 2307/7376: Thickness - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM ## Abstract A composite structure combines a strong, hard, low-friction skin with a soft underlying layer that collectively provide good abrasion resistance. In one aspect, the composite structure may be formed of elastomeric materials with an optical profile suitable for retrographic sensing. However, the resulting composite may also or instead be advantageously employed in a range of applications such as gaskets, seals, clamps, robotic end effectors, and the like that would benefit from a pliable, abrasion resistant contact surface. ## Claims ### Claim 1 A device for abrasion resistant contact with a target surface, comprising: a support structure; a substrate disposed on the support structure, the substrate having: a first Shore A hardness of no more than ten, and a first thickness of at least one millimeter; and a film disposed on the substrate for contact with the target surface, the film having: a second Shore A hardness of at least fifty, a second thickness not exceeding five hundred microns, a tensile strength of at least ten Megapascals, an elongation at break of at least three hundred percent, and a kinetic coefficient of friction against matte steel not exceeding 1.5. ### Claim 2 (depends on 1) The device of claim 1, wherein the film includes a thermoplastic polyurethane, a thermoset polyurethane, or a nitrile rubber. ### Claim 3 A device comprising: a substrate including a first elastomer with a first hardness, wherein the first elastomer has a Shore A hardness not exceeding twenty; and a film including a second elastomer covering a first surface of the substrate of the first elastomer, the second elastomer having: (a) a second hardness greater than the first hardness of the first elastomer, (b) a tear strength greater than the first elastomer, and (c) a low coefficient of friction on a second surface facing away from the first surface of the substrate of the first elastomer. ### Claim 4 (depends on 3) The device of claim 3, the second elastomer has a tensile strength greater than the first elastomer. ### Claim 5 (depends on 3) The device of claim 3, wherein the first elastomer and the second elastomer are configured to provide an abrasion resistant elastomeric pad. ### Claim 6 (depends on 5) The device of claim 5, wherein the first elastomer has a Shore A hardness not exceeding five. ### Claim 7 (depends on 3) The device of claim 3, wherein the second elastomer has a shore A hardness of at least thirty. ### Claim 8 (depends on 3) The device of claim 3, wherein the second elastomer has a Shore A hardness of at least fifty. ### Claim 9 (depends on 3) The device of claim 3, wherein the film has a thickness between 5 microns and 1000 microns. ### Claim 10 (depends on 3) The device of claim 3, wherein the film has a thickness between 20 microns and 400 microns. ### Claim 11 (depends on 3) The device of claim 3, wherein the film has a thickness not exceeding 500 microns. ### Claim 12 (depends on 3) The device of claim 3, wherein the film has a thickness not exceeding 200 microns. ### Claim 13 (depends on 3) The device of claim 3, wherein the substrate of the first elastomer has a thickness greater than 500 microns. ### Claim 14 (depends on 3) The device of claim 3, wherein the first elastomer is optically clear, the device further comprising a rigid, optically clear support structure for the first elastomer. ### Claim 15 (depends on 3) The device of claim 3, wherein the film includes a coating formed by spray coating a dilute solution of an uncured polymer and silsesquioxane microspheres and curing the dilute solution to an uneven matte surface with contours formed in part by the silsesquioxane microspheres to mitigate uniform contact surfaces. ### Claim 16 (depends on 3) The device of claim 3, wherein the second surface of the film provides a contact surface having a composite abrasion resistance greater than an abrasion resistance of the first elastomer alone or the second elastomer alone. ### Claim 17 (depends on 16) The device of claim 16, wherein the composite abrasion resistance is at least fifty percent greater than the first elastomer alone or the second elastomer alone. ### Claim 18 (depends on 16) The device of claim 16, wherein the composite abrasion resistance is at least one hundred percent greater than the first elastomer alone or the second elastomer alone. ### Claim 19 (depends on 3) The device of claim 3, wherein the film includes an opaque layer. ### Claim 20 (depends on 3) The device of claim 3, further comprising a robotic finger, wherein the first elastomer and the second elastomer form a contact pad for the robotic finger.