# US 5,699,970 A · Meat-comminuting machine with improved vacuum discharge mechanism > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,699,970 A - Document ID: US5699970A - Status: Granted - Kind: A - Application number: 08/678,175 - Filed: 1996-07-11 - Granted: 1997-12-23 - Earliest claimed: 1996-07-11 - Assignees: 2 M Tool Co., Inc. - Inventors: Vladan Mihailovic - Web page: https://patentgrep.com/patent/US5699970A ## CPC - B02C 18/304: {with several axially aligned knife-perforated disc units} - B02C 18/305: {Details} - 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 A discharge mechanism for meat-comminuting machine is disclosed, which comprises a housing structure and a discharge rotor. The housing structure defines a discharge chamber adapted to receive meat comminuted by the meat-comminuting machine, through a front mouth of the discharge chamber, and defines a back wall of the discharge chamber and a cylindrical wall thereof. The discharge rotor is arranged to be rotatably driven in the discharge chamber for discharging the comminuted meat from the discharge chamber, through an outlet of the cylindrical wall, via centrifugal force. The discharge rotor has a hub extending axially, an annular flange extending radially from a back end of the hub and having an inner, circumferential edge and an outer, circumferential edge, which is close to but spaced by a circumferential gap from the other, circumferential wall, and fins extending radially from the hub, toward the other, circumferential edge, and axially from a front face of the annular flange, toward a front end of the hub. The discharge rotor has formations on the back face of the annular flange, either spiral grooves or spiral ribs, for removing any comminuted meat tending to accumulate between the back face of the annular flange and the back wall of the discharge chamber structure by displacing the tending-to-accumulate meat radially outwardly toward the outer, circumferential edge of the annular flange, via centrifugal force. The hub has a hollow portion opening backwardly. A tube extending into the discharge chamber, through a hole in the back wall of the discharge chamber, into the hollow portion of the hub is used for drawing a partial vacuum within the discharge chamber. ## Claims ### Claim 1 In a meat-comminuting machine comprising a discharge mechanism, which comprises (a) a housing structure defining a discharge chamber adapted to receive meat comminuted by the meat-comminuting machine, through a front mouth of the discharge chamber, the housing structure defining a back wall of the discharge chamber and a cylindrical wall of the discharge chamber, the cylindrical wall defining an axis and having an outlet, and (b) means including a discharge rotor arranged to be rotatably driven in the discharge chamber, about the axis defined by the cylindrical wall, for discharging the comminuted meat from the discharge chamber, through the outlet of the cylindrical wall, via centrifugal force, the discharge rotor having a hub extending axially along the axis defined by the cylindrical wall, the hub having a front end and a back end, the discharge rotor having an annular flange extending radially from the back end of the hub, the annular flange having a front face, a back face, an inner, circumferential edge, and an outer, circumferential edge, which is close to but spaced by a circumferential gap from the circumferential wall, the discharge rotor having fins extending radially from the hub to the outer, circumferential edge of the annular flange, and axially from the front face of the annular flange, toward the front end of the hub, an improvement wherein the discharge rotor has a groove extending along the back face of the annular flange, between the circumferential edges of the annular flange, the groove defining means for removing any comminuted meat tending to accumulate between the back face of the annular flange and the back wall of the discharge chamber by displacing the tending-to-accumulate meat radially outwardly toward the outer, circumferential edge of the annular flange, via centrifugal force, wherein the hub has a hollow portion, which opens backwardly toward the back wall of the discharge chamber, and wherein the discharge mechanism is equipped with means including a tube extending into the discharge chamber, through a hole in the back wall of the discharge chamber, into the hollow portion of the hub for drawing a partial vacuum within the discharge chamber. ### Claim 2 (depends on 1) The improvement of claim 1 wherein the groove is one of plural similar grooves extending along the back face of the annular flange, between the circumferential edges of the annular flange, and spaced from one another with generally uniform spacings around the back face of the annular flange. ### Claim 3 (depends on 2) The improvement of claim 2 wherein the grooves extend along spiral paths. ### Claim 4 In a meat-comminuting machine comprising a discharge mechanism, which comprises (a) a housing structure defining a discharge chamber adapted to receive meat comminuted by the meat-comminuting machine, through a front mouth of the discharge chamber, the housing structure defining a back wall of the discharge chamber and a cylindrical wall of the discharge chamber, the cylindrical wall defining and axis and having an outlet, and (b) means including a discharge rotor arranged to be rotatably driven in the discharge chamber, about the axis defined by the cylindrical wall, for discharging the comminuted meat from the discharge chamber, through the outlet of the cylindrical wall, via centrifugal force, the discharge rotor having a hub extending axially along the axis defined by the cylindrical wall, the hub having a front end and a back end, the discharge rotor having an annular flange extending radially from the back end of the hub, the annular flange having a front face, a back face, an inner, circumferential edge, and an outer, circumferential edge, which is close to but spaced by a circumferential gap from the circumferential wall, the discharge rotor having fins extending radially from the hub, toward the outer, circumferential edge of the annular flange, and axially from the front face of the annular flange, toward the front end of the hub, an improvement wherein the discharge rotor has a rib extending along the back face of the annular flange, between the circumferential edges of the annular flange, the rib defining means for removing any comminuted meat tending to accumulate between the back face of the annular flange and the back wall of the discharge chamber by displacing the tending-to-accumulate meat radially outwardly toward the outer, circumferential edge of the annular flange, via centrifugal force, wherein the hub has a hollow portion, which opens backwardly toward the back wall of the discharge chamber, and wherein the discharge mechanism is equipped with means including a tube extending into the discharge chamber, through a hole in the back wall of the discharge chamber, into the hollow portion of the hub for drawing a partial vacuum within the discharge chamber. ### Claim 5 (depends on 4) The improvement of claim 4 wherein the rib is one of plural similar ribs extending along the back face of the annular flange, between the circumferential edges of the annular flange, and spaced from one another with generally uniform spacings around the back face of the annular flange. ### Claim 6 (depends on 5) The improvement of claim 5 wherein the ribs extend along spiral paths. ### Claim 7 In a meat-comminuting machine comprising a discharge mechanism, which comprises (a) a housing structure defining a discharge chamber adapted to receive meat comminuted by the meat-comminuting machine, through a front mouth of the discharge chamber, the housing structure defining a back wall of the discharge chamber and a cylindrical wall of the discharge chamber, the cylindrical wall defining an axis and having an outlet, and (b) means including a discharge rotor arranged to be rotatably driven in the discharge chamber, about the axis defined by the cylinder wall, for discharging the comminuted meat from the discharge chamber, through the outlet of the cylindrical wall, via centrifugal force, the discharge rotor having a hub extending axially along the axis defined by the cylindrical wall, the hub having a front end and a back end, the discharge rotor having an annular flange extending radially from the back end of the hub, the annular flange having a front face, a back face, an inner, circumferential edge and an outer, circumferential edge, which is close to but spaced by a circumferential gap from the circumferential wall, the discharge rotor having fins extending radially from the hub, toward the outer, circumferential edge of the annular flange, and axially from the front face of the annular flange, toward the front end of the hub, an improvement wherein the discharge rotor has means provided on the back face of the annular flange for removing any comminuted meat tending to accumulate between the back face of the annular flange and the back wall of the discharge chamber by displacing the tending-to-accumulate meat radially outwardly toward the outer, circumferential edge of the annular flange, via centrifugal force, wherein the hub has a hollow portion, which opens backwardly toward the back wall of the discharge chamber, and wherein the discharge mechanism is equipped with means including a tube extending into the discharge chamber, through a hole in the back wall of the discharge chamber, into the hollow portion of the hub for drawing a partial vacuum within the discharge chamber. ### Claim 8 In a meat-comminuting machine comprising a discharge mechanism, which comprises (a) a housing structure defining a discharge chamber adapted to receive meat comminuted by the meat-comminuting machine, through a front mouth of the discharge chamber, the housing structure defining a back wall of the discharge chamber and a cylindrical wall of the discharge chamber, the cylindrical wall defining an axis and having an outlet, and (b) means including a discharge rotor arranged to be rotatably driven in the discharge chamber, about the axis defined by the cylindrical wall, for discharging the comminuted meat from the discharge chamber, through the outlet of the cylindrical wall, via centrifugal force, the discharge rotor having a hub extending axially along the axis defined by the cylindrical wall, the hub having a front end and a back end, the discharge rotor having an annular flange extending radially from the back end of the hub, the annular flange having a front face, a back face, an inner, circumferential edge, and an outer, circumferential edge, which is close to but spaced by a circumferential gap from the circumferential wall, the discharge rotor having fins extending radially from the hub to the outer, circumferential edge of the annular flange, and axially from the front face of the annular flange, toward the front end of the hub, an improvement wherein the hub has a hollow portion, which opens backwardly toward the back wall of the discharge chamber, and wherein the discharge mechanism is equipped with means including a tube extending into the discharge chamber, through a hole in the back wall of the discharge chamber, into the hollow portion of the hub for drawing a partial vacuum within the discharge chamber.