# US 8,770,080 B2 · Cutting wheel for glass substrate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,770,080 B2 - Document ID: US8770080B2 - Status: Granted - Kind: B2 - Application number: 12/939,415 - Filed: 2010-11-04 - Published: 2011-07-21 - Granted: 2014-07-08 - Earliest claimed: 2010-01-19 - Assignees: Samsung Display Co., Ltd. - Applicants: Oh-June Kwon; Seung-Yong Song; Young-Seo Choi; Jin-Hwan Jeon; Sun-Young Jung; Ji-Hun Ryu; Charles Joo; Kwan-Hee Lee; Min-Soo Kim - Inventors: Oh-June Kwon; Seung-Yong Song; Young-Seo Choi; Jin-Hwan Jeon; Sun-Young Jung; Ji-Hun Ryu; Charles Joo; Kwan-Hee Lee; Min-Soo Kim - Web page: https://patentgrep.com/patent/US8770080B2 ## CPC - C03B 33/107: {Wheel design, e.g. materials, construction, shape} - B26D 1/00: Cutting through work characterised by the nature or movement of the cutting member {or particular materials not otherwise provided for}; Apparatus or machines therefor; Cutting members therefor - B28D 1/225: {for scoring or breaking, e.g. tiles} - B26D 2001/002: {Materials or surface treatments therefor, e.g. composite materials} - B26D 2001/0046: {rotating continuously about an axis perpendicular to the edge} - B26D 2001/0053: {having a special cutting edge section or blade section} - B26D 2001/006: {the cutting blade having a special shape, e.g. a special outline, serrations} - Y02P 40/57: Improving the yield, e-g- reduction of reject rates - Y10T 83/0304: Grooving - Y10T 225/30: Breaking or tearing apparatus - C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES - B26D: CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING (for growing crops or plants A01D, A01G; for fodder or straw A01F; for bulk butter A01J; for dough A21C; slaughtering A22B; for tobacco, cigars or cigarettes A24; marking-out, perforating or making buttonholes A41H25/00; manufacturing footwear A43D; brushmaking A46D; surgery A61B; disintegrating, mincing or shredding in general B02C; cutting wire, making pins or nails B21F, B21G; of the kind used formetal B23; cutting by abrasive fluid jets B24C5/02; hand-held cutting tools B26B; perforating, cutting-out, stamping-out or punching, or severing by means other than cutting B26F; for wood B27; for stone B28D; working of plastics or substances in a plastic state B29; making boxes, cartons, envelopes or bags, of paper or similarly worked materials, e.g. metal foil, B31B; article or web delivery apparatus incorporating cutting or line-perforating devices B65H35/00; for leather or upholstery B68, C14B; for glass C03B; making matches C06F; for peat C10F; for sugar C13B45/00; for textile materials D06H; civil engineering, building, mining, see Section E; for light guides G02B6/25; cutting processed photographic material G03D15/04) - B28D: WORKING STONE OR STONE-LIKE MATERIALS - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A cutting device that facilitates a cutting operation of a glass substrate and reduces internal defects that can be caused by surface cracks. The cutting wheel includes a cutting blade formed along a circumference thereof with respect to a rotation axis, wherein first and second slopes of the cutting blade are formed in an asymmetrical shape about an edge of the cutting blade where the first and second slopes meet each other. ## Claims ### Claim 1 A cutting wheel, comprising: a center body having third and fourth sides substantially parallel and opposite to each other; a cutting blade formed along a circumference of the center body of the cutting wheel with respect to a rotational axis of the cutting wheel, said cutting blade having first and second sides which are intersected by the third and fourth sides, respectively and which are formed in an asymmetrical shape about a vertical line crossing a cutting edge where the first and second sides meet each other, the cutting blade comprising: a cutting tip formed asymmetrically about the vertical line on a peripheral edge of the cutting blade and including the cutting edge; and a portion positioned between the center body of the cutting wheel and the cutting tip of the cutting blade, an interface positioned between the cutting tip and the portion of the cutting blade crossing the cutting blade, intersecting the first and second sides, and not crossing any of the third and fourth sides of the center body. ### Claim 2 (depends on 1) The cutting wheel of claim 1, wherein lengths of the cutting tip, which extend in directions parallel to the first and second sides, are L1 and L2, the lengths, L1 and L2, meet the inequality L1>L2. ### Claim 3 (depends on 1) The cutting wheel of claim 1, the interface of the cutting tip and the portion of the cutting blade is parallel to the rotational axis of the cutting wheel. ### Claim 4 (depends on 1) The cutting wheel of claim 1, wherein the cutting tip has the interface of the cutting tip and the portion of the cutting blade inclined with respect to the rotational axis of the cutting wheel. ### Claim 5 (depends on 1) The cutting wheel of claim 1, further comprising a plurality of saw blades that protrude from a circumference of the cutting blade. ### Claim 6 (depends on 1) The cutting wheel of claim 1, wherein the cutting tip is a diamond tip or a cemented carbide tip. ### Claim 7 (depends on 1) The cutting wheel of claim 1, wherein a cutting groove conforming to the shape of the cutting edge is formed in a substrate with the application of pressure by the cutting wheel onto the substrate. ### Claim 8 (depends on 7) The cutting wheel of claim 7, comprised of the first side having the first side of the cutting blade being configured to apply greater force to the substrate when the cutting device is forming the cutting groove than force applied by the second side having the second side of the cutting blade onto the cutting groove. ### Claim 9 (depends on 8) The cutting wheel of claim 8, wherein more surface cracks are created in the substrate on a side of the cutting grove corresponding to the first side having the first side of the cutting blade than surfaces cracks created on another side of the cutting groove corresponding to the second side having the second side of the cutting blade.