# US 12,005,457 B2 · Blade > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,005,457 B2 - Document ID: US12005457B2 - Status: Granted - Kind: B2 - Application number: 17/997,729 - Filed: 2021-04-06 - Published: 2023-06-22 - Granted: 2024-06-11 - Earliest claimed: 2020-06-30 - Assignees: Lumbeck & Wolter GmbH & Co. KG - Applicants: Lumbeck & Wolter GmbH & Co. KG - Inventors: Udo Back; Fabian Döring - Web page: https://patentgrep.com/patent/US12005457B2 ## CPC - B02C 18/362: {Knives} - B02C 18/30: Mincing machines with perforated discs and feeding worms - B02C 18/36: Knives or perforated discs - B02C: CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN ({household tools and machines for pulverising foodstuffs, e.g. coffee and spice mills A47J42/00; pharmaceutical mortars A61J3/02; mechanical processing of refuse and garbage B03B9/06; dressing mould materials by grinding B22C5/04}; obtaining metallic powder by crushing, grinding or milling B22F9/04; {recovery of plastics by disintegrating B29B17/00; crushing raw materials in starch making C08B30/02; beaters for papermaking D21D1/02; crushing devices specially for transport in mines E21F13/002; slag crushing devices F23J1/00; fuel milling devices in combustion apparatus F23K1/00; household devices for crushing coal F24B15/02; ice disintegrating devices F25C5/02}) ## Abstract The invention relates to a blade, more particularly for a meat grinder. The blade (10) has a collar-type sealing ring (18) between the hub (11) and the inner ends of the blade wings (14). The sealing ring (18) has the same height as the hub (11) as the adjacent sealing ring (18) has or the hub (11) has a smaller height. The hub (11) thus does not impede the rubbing of the cutting edges (16, 17) of the blade (10) or the rubbing of the sealing ring (18). ## Claims ### Claim 1 A blade (10) configured for a meat grinder, the blade comprising: a central hub (11) provided with a bore (12) for rotationally fixed mounting on a blade journal, a plurality of knives (14) with cutting edges (16, 17) on both sides, the knives having radially outer ends and having inner ends, the cutting edges having a height, wherein the radially outer ends of the plurality of knives (14) are connected to a blade ring (15), a collar-shaped sealing ring (18) between the hub (11) and the inner ends of the knives (14), the sealing ring having a height, wherein the sealing ring (18) has the height of the cutting edges (16, 17), wherein the hub (11) has the same height as the adjacent sealing ring (18) or the hub (11) has a lower height than the adjacent sealing ring (18). ### Claim 2 (depends on 1) The blade according to claim 1, wherein the sealing ring (18) is provided only on one side of the blade. ### Claim 3 (depends on 2) The blade according to claim 2, wherein the hub (11) has a height (H) on the side where no sealing ring is arranged, which height (H) is greater than the height of the cutting edges (16, 17). ### Claim 4 (depends on 3) The blade according to claim 3, wherein a sufficient distance (A) is present on the side without a sealing ring between the hub (11) and the cutting edges (16, 17). ### Claim 5 (depends on 1) The blade according to claim 1, the blade having an outlet side, wherein the blade ring (15) has one or more separating openings (20) on the outlet side. ### Claim 6 (depends on 1) The blade according to claim 1, the blade having an outlet side, the cutting edges having a radial length, wherein a plurality of cutting edges (17) are shortened in their radial length on the outlet side. ### Claim 7 (depends on 5) The blade according to claim 5, the blade having an inlet side, the cutting edges having a radial length, wherein a plurality of cutting edges (17) are shortened in their radial length on the inlet side. ### Claim 8 (depends on 6) The blade according to claim 6, wherein alternately shortened cutting edges (17) and full-length cutting edges (16) are arranged on the plurality of knives (14). ### Claim 9 (depends on 6) The blade according to claim 6, wherein an even number of knives among the plurality of knives (14) are arranged alternately with two shortened cutting edges (17) and two full-length cutting edges (16) on the plurality of knives (14). ### Claim 10 (depends on 7) The blade according to claim 7, each knife among the plurality of knives having a one side and an other side, wherein each knife among the plurality of knives (14) on one side has a shortened cutting edge (17) and on the other side a full-length cutting edge (16). ### Claim 11 (depends on 1) The blade according to claim 1, the blade having an inner ring, wherein an opening (21) is located between each two adjacent knives among the plurality of knives (14), the inner ring (19) and the outer blade ring (15), wherein each two adjacent openings (21) have different sizes. ### Claim 12 (depends on 11) The blade according to claim 11, wherein the openings (21) of different sizes are formed by knives of different widths among the plurality of knives (14). ### Claim 13 (depends on 11) The blade according to claim 11, wherein the openings (21) of different sizes are formed by a differing orientation of the knives among the plurality of knives (14). ### Claim 14 (depends on 1) The blade according to claim 1, wherein there are openings of differing sizes in the blade, the openings defining an arrangement, and further characterized in that the arrangement of openings (21) of differing sizes is asymmetrical. ### Claim 15 (depends on 1) The blade according to claim 1, wherein the hub (11) has a lower height than the adjacent sealing ring (18). ### Claim 16 (depends on 2) The blade according to claim 2, the blade having an outlet side, wherein the sealing ring (18) is provided only on the outlet side. ### Claim 17 (depends on 3) The blade according to claim 3, wherein the height (H) is 1.5 mm to 5 mm. ### Claim 18 (depends on 4) The blade according to claim 4, wherein the distance (A) is 3 mm to 25 mm.