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US3730363A - Cutting head for comminuting machines - Google Patents

Cutting head for comminuting machines Download PDF

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Publication number
US3730363A
US3730363A US00149254A US3730363DA US3730363A US 3730363 A US3730363 A US 3730363A US 00149254 A US00149254 A US 00149254A US 3730363D A US3730363D A US 3730363DA US 3730363 A US3730363 A US 3730363A
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US
United States
Prior art keywords
teeth
knife
cutting
cutting head
specified
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00149254A
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English (en)
Inventor
J Karpf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
G W STEFFENS
Original Assignee
G W STEFFENS
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Filing date
Publication date
Application filed by G W STEFFENS filed Critical G W STEFFENS
Application granted granted Critical
Publication of US3730363A publication Critical patent/US3730363A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • B02C18/20—Sickle-shaped knives

Definitions

  • a cutting head for comminuting machines, particularly meat cutting machines includes rotatable angu- 'larly displaced knives which are secured to a knife support or driving disk by means of cooperating, or engaging, sets of teeth precluding displacement of the knife in a direction longitudinally thereof relative to their support.
  • each driving disk defines a knifereceiving groove extending substantially in the direction of a diameter of a knife support, or driving disk.
  • the aforementioned groove receives the radially inner portion of a cutting knife, and its cutting portion or blade portion projects radially outwardly from its radially inner portion and its knife support, or driving disk.
  • a plurality of such knife supports, or driving disks may be stacked and clamped together by appropriate clamping means.
  • the axial spacing between contiguous knife supports, or clamping disks may be controlled by the insertion of spacers between said supports or disks.
  • Cutting heads of the aforementioned type project into a bowl containing meat, or other matter intended to be cut.
  • the capacity of such bowls has been on the increase during recent times, and at the present bowls adapted to contain as much as 1,300 lbs of meat are not uncommon.
  • Large machines of this type may have sets of knives having an outer diameter of about 30 inches, and peripheral velocities in the order of, or in excess of, 300 feet per second.
  • the knives of such machines are subjected to large forces, in particular large centrifugal forces. It has occured that cutting knives, even though carefully clamped in position, have moved radially outwardly under the action of centrifugal forces, and have engaged and damaged the surrounding meat or other matter containing bowl.
  • the cutting knives are arranged in groups which are angularly displaced, but the constituent knives of each such group are not angularly displaced. This limits the cutting efficiency of their cutting heads. It is desirable in the interest of increased cutting efficiency and in order to obtain comminuted substances which are as homogenous as possible to angularly displace each cutting knife relative to any contiguous cuttingknife of a cutting head.
  • the cross-section of the drive shaft for the cutting head is in the shape of a polygon, e.g. that of a hexagon. It is desirable to form stacks of cutting knives along a drive shaft in the shape of a polygon the position of the constituent-knives of which does not depend upon the geometry of the cross-section of the drive shaft, and which allow to select an angular displacement of each cutting knive relative to an adjacent or contiguous cutting knife irrespective of the shape of the cross-section-of the drive shaft.
  • the invention relates to cutting heads which are not subject to the above referred-to limitations of comparable prior art cutting heads, and include the above referred-to desirable features.
  • a cutting head for comminuting machines embodying this invention includes a drive shaft, a driving disk and a cutting knife.
  • the driving disk is mounted on, and jointly rotatable with, the drive shaft. It has a knifereceiving groove in one of the end surfaces thereof.
  • the knife-receiving groove has a first system of teeth in one of the lateral surfaces thereof.
  • the cutting knife has a radially outer portion and a radially inner portion. The latter defines an aperture for the passage of the aforementioned drive shaft, and is inserted into the knife-receiving groove of the driving disk.
  • An edge of the radially inner portion of the cutting knife has a second system of teeth having substantially the same shape as said first system of teeth and engaging said first system of teeth and thereby precluding displacement of said cutting knife relative to said driving disk in a direction substantially longitudinally of said groove of said driving disk.
  • FIG. I is a top-plan view of a cutting head including a plurality of knives arranged in a predetermined angular relation;
  • FIG. 2 is a view of the same kind as FIG. 1 showing a cutting head including a plurality of knives arranged in a predetermined angular relation differing from that shown in FIG. 1;
  • FIG. 3 is a top-plan view of a cutting knife support exposing to view the means for precluding radial movement of a cutting knife;
  • FIG. 4 is a top-plan view of the cutting knife of the structure of FIG. 3 per se turned around deg.;
  • FIG. 5 shows another embodiment of the invention in the same fashion as FIG. 3;
  • FIG. 6 shows still another embodiment of the invention in the same fashion as FIGS. 3 and 5;
  • FIG. 7 shows a spacing disk intended for the structure of FIG. 6
  • FIG. 8 is a top-plan view of a modified cutting knife embodying this invention.
  • FIGS. 9-11, inclusive are diagrammatic illustrations of various profiles of teeth which may be used to carry this invention into effect.
  • FIGS. 1 and 2 DESCRIPTION OF PREFERRED EMBODIMENTS
  • numeral 1 has been applied to indicate a drive shaft for operating a plurality of rotatable knives 3.
  • the cross-section of drive shaft 1 is in the shape of a hexagon.
  • a plurality of driving disks 2 are mounted upon shaft 1, forming a stack of disks.
  • Each driving disk 2 is provided with a central aperture or perforation 2a in the shape of a hexagon engaged by shaft 1.
  • the aperture 2a and the cross-section of shaft I are virtually congruent.
  • Driving disks 2 support cutting knives 3 and transmit the rotation of shaft 1 to the latter.
  • knives 3 and their relative arrangement may vary. As shown in FIG. 1, knives 3 form three separate and distinct groups. The knives forming an upper right group have a smaller angular displacement than the knives forming an upper left group and the knives forming a lower center group. According to FIG. 2 the angular displacement of all knives 3 is equal and 30.
  • driving disk 2 supports a pair of radially spaced fastener segments 2b.
  • the radially inner surfaces 2c of fastener segments 2b define a groove 2' for receiving the radially inner portions or shafts 3a of knives 3.
  • the fastener segments 2b are positioned relative to, and secured to, driving disks 2 by pins 2d and screws 2e. This makes it possible to readily remove and replace fastener segments 2b.
  • This mode of affixing fastener segments 2b to driving disks 2 is, however, optional.
  • Fastener segments 2b may be permanently affixed to driving disks 2, as by welding or rivetting.
  • the radially inner surface 20 of the upper fastener segment 2b is sawtooth-shaped, as indicated at 2f, but the radially inner surface 20 of the lower fastener segment 2b is planar.
  • Knife 3 is provided at the radially inner portion 3a thereof with an elongated hole or aperture 3b having a width x.
  • the width x exceeds the largest diameter y of drive shaft 1.
  • the parallel edges of the radially inner portion 3a of knives 3 are provided with systems of teeth 3c which have the same shape as the teeth 2f on fastener segment 2b.
  • the upper system of teeth 30 of knife 3 engages the system of teeth 2f of the upper fastener segment 2b, and thus firmly positions knife 3, while the lower system of teeth 30 of knife 3 engages the planar surface 2c of the lower fastener segment 2b.
  • the upper system of teeth 3c and the lower system of teeth 3c of knife 3 are displaced in longitudinal direction half the length of one tooth.
  • FIG. 3 shows a position of knife 3 in solid lines and a position of knife 3 in dotted lines. Assuming the length of a tooth to be in the order of one-tenth of an inch, and assuming that a knife that has originally been positioned as shown in solid lines in FIG. 3 is placed upon having been sharpened by grinding in the position shown in dotted lines in FIG. 3, this would amount to a shortening of the effective length of the knife of but one half the length ofa tooth, or about one-twentieth of an inch.
  • the same may be provided with a pair of fastener segments 2fon the rear side thereof, thus forming a knife-receiving groove 2 both on the front and on the rear side thereof.
  • a knife is then arranged in each of the knife-receiving grooves 2 of which one has the position indicated in solid lines of FIG. 3, and the other the position indicated in dotted lines in FIG. 3. Both knives rotate in parallel planes which are spaced in a direction longitudinally of drive shaft 1.
  • a cross-section through this arrangement would be substantially in the shape of an I.
  • the driving disk 2 of the cutting head defines a groove 2" receiving two knives 3'.
  • the radially inner fork-shaped portion 3a of each knife 3' has a projection 3d whose radially outer edge forms a system of teeth 3c.
  • Each of the teeth 30 has the shape of an equilateral triangle.
  • the radially inner edges 3e of each projection 3d is straight and planar, i.e., doesnot have a toothed surface.
  • the bottom of groove 2" is provided with a pair of fastener blocks 3] which may be pinned to, and screwed against, driving disk 2 in the same fashion as the fastener segments 2b of FIG. 3.
  • the left side and the right side of FIG. 5 illustrate two slightly different modifications of the same structure, as will be explained below more in detail.
  • the portion 3g of knife 3 has a planar surface arranged in abutting relation to a planar surface of fastener block 3].
  • the portion 3g of knife 3 has a toothed surface engaging a similar toothed surface of fastener block 3)".
  • the arrangement shown to the left of FIG. 5 is satisfactory, but that shown to the right of FIG. 5 provides an even more effective mode of positioning knife 3.
  • drive shaft 1" supports the driving disk 2".
  • the cross-section of shaft 1 is hexagonal and driving disk 2" has a corresponding centrally located hole or aperture.
  • Each of a pair of knives 3" is provided with a radially inner or shaft portion 3a".
  • the fastener segments 2b" and one end surface of driving disk 2" form a groove or recess 2" for receiving the radially inner ends of knives 3".
  • Each knife is provided with a pair of oblong holes 3h at the radially inner end thereof. Screws 3i" projecting through the oblong holes 3h firmly secure the knives 3" to driving disk 2".
  • the radially inner portions 3a of knives 3" are provided with systems of teeth 30" engaging corresponding systems of teeth 2f" provided in the lateral surfaces 20" of fastener segments 2b".
  • FIG. 7 Upon securing the knives 3" to driving disk 2" a spacer disk 4 shown in FIG. 7 is superimposed upon parts 3 and 2".
  • the spacer disk 4 is provided with four apertures or holes 4a in registry with screws 31" for receiving the heads of the aforementioned screws or for receiving nuts mounted upon the aforementioned screws.
  • the spacer disk 4 is further provided with a central bore or aperture 4b having a larger diameter than the largest diameter of shaft 1
  • FIG. 8 shows a cutting knife 3" having a radially inner portion 3a, having about the same dimensions, or the same diameter, as the diameter of a shaft-driven driving disk (not shown in FIG. 8).
  • the radially inner portion of knife 3" supports a plate member 3k which may be affixed to knife 3" by means of rivets 31".
  • the plate member 3k is provided with an oblong aperture 3b which may be in the shape of a hexagon, as shown in FIG. 8.
  • the width of oblong aperture 3b exceeds the largest diameter of the driving shaft (not shown in FIG. 8) intended to rotate knife 3".
  • Knife 3" is provided with a hole or aperture which is substantially congruent, and arranged in registry with, the hole or aperture 312" in plate member 3k, and which, therefore, does not appear in FIG. 8.
  • the plate member 3 k is provided with a pair of parallel edges each having a system of teeth 3c. These teeth 3c' are intended to be engaged by a pair of fastener segments of the kind shown and described in connection with FIG. 3 of which one or both have a system of teeth on juxtaposed surfaces thereof.
  • the system of teeth shown in FIG. 9 is substantially sinusoidal, that shown in FIG. 10 has teeth which have the shape of trapezoids, and that shown in FIG. 11 has teeth which are rectangular.
  • all of a plurality of driving disks may be provided with driving-shaft-receiving holes, or apertures, which have the same position, and thereafter fastener segments may be mounted on the driving disks which are angularly displaced as deemed necessary, or desirable.
  • the cutting knives are positively blocked against movement in any radial direction under the action of centrifugal forces by virtue of pairs of co-engaging sets of teeth.
  • the shape of the co-engaging teeth is optional, as suggested by FIGS. 9 to 11, i.e. the desired result may be achieved with teeth of various shapes.
  • the shape of the teeth shown in FIGS. 3 and 4 is substantially the shape of the teeth of a saw made up of triangles whose sides are of unequal length enclosing an acute angle at the point farthest remote from the center line, or median line, of the knife blade.
  • the length of each tooth is preferably in the order of onetenth of an inch, or slightly more than that.
  • the drive shaft does not engage the sidewalls of the oblong apertures in the radially inner portions of the cutting knives, and does not directly transmit its torque to the cutting knives.
  • the drive shaft engages a substantially congruent aperture in the driving disks and drives the latter, and the driving disks transmit a torque to the cutting knives which they support.
  • the oblong aperture for the passage of the drive shaft may be a hole, as shown in FIGS.
  • the radially inner end of the cutting knives may be forked-shaped, in which case the oblong aperture in the radially inner ends of the cutting knives is in the form ofa slot which is open on one side thereof as shown in FIG. 5.
  • a blade-receiving groove in driving disks may be provided on opposite lateral surfaces with rows ofteeth which are displaced relative to each other in a direction longitudinally of the cutting knife, the displacement being preferably half the length of a single tooth.
  • a cutting head for comminuting machines including a. a drive shaft;
  • a driving disk mounted on and jointly rotatable with said drive shaft and having a knife-receiving groove in one of the end surfaces thereof, said knife-receiving groove having a first system of teeth in one of the lateral surfaces thereof;
  • a cutting knife having a radially outer portion and a radially inner portion, said radially inner portion defining an aperture for the passage of said drive shaft and being inserted into said knife-receiving groove of said driving disk, an edge of said radially inner portion of said cutting knife having a second system of teeth having substantially the same shape as said first system of teeth and engaging said first system of teeth and thereby precluding displacement of said cutting knife relative to said driving disk in a direction substantially longitudinally of said groove of said driving disk.
  • a cutting head as specified in claim ll including a. a driving disk having a pair of knife-receiving grooves each on one of the end surfaces thereof, each of said pair of knife-receiving grooves having a first system of teeth in one of the lateral surfaces thereof; and
  • a pair of cutting knives each inserted into one of said pair of knife-receiving grooves and each having a second system of teeth engaging said first system of teeth in one of the lateral surfaces in one of said pair of knife-receiving grooves.
  • a cutting head as specified in claim 4 wherein the teeth on one side of said opposite edges are displaced relative to the teeth on the other of said opposite edges about one half the length of one of said teeth.
  • a cutting head as specified in claim ll wherein said drive shaft has a cross-section in the shape of a polygon, and wherein the said aperture of said cutting knife is oblong and has a width in excess of the largest diameter of said polygon.
  • a cutting head as specified in claim 1 including a. a plurality of stacked driving disks each having a central aperture in the shape of a regular polygon angularly displaced relative to an aperture in a contiguous of said plurality of stacked driving disks; and

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Harvester Elements (AREA)
  • Milling Processes (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
  • Food-Manufacturing Devices (AREA)
US00149254A 1970-06-04 1971-06-02 Cutting head for comminuting machines Expired - Lifetime US3730363A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2027429A DE2027429C3 (de) 1970-06-04 1970-06-04 Messerkopf für Fleischkutter

Publications (1)

Publication Number Publication Date
US3730363A true US3730363A (en) 1973-05-01

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Application Number Title Priority Date Filing Date
US00149254A Expired - Lifetime US3730363A (en) 1970-06-04 1971-06-02 Cutting head for comminuting machines

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US (1) US3730363A (da)
AT (1) AT324146B (da)
BE (1) BE767542A (da)
CH (1) CH536138A (da)
DE (1) DE2027429C3 (da)
DK (1) DK126361B (da)
ES (1) ES195414Y (da)
FR (1) FR2095617A5 (da)
GB (1) GB1350452A (da)
LU (1) LU63246A1 (da)
NL (1) NL169144C (da)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3871590A (en) * 1973-03-06 1975-03-18 G Walter Steffens Blade arrangements for meat cutters
US3897020A (en) * 1972-08-31 1975-07-29 Techmed Ag Fa Cutter knife for the preparation of meat
US3937408A (en) * 1973-11-29 1976-02-10 Immanuel Buck Blade arrangement for a meat cutter
US4294415A (en) * 1978-08-22 1981-10-13 Kraemer & Grebe Gmbh & Co. Kg Maschinen- Und Modellfabrik Cutter knife
US4696434A (en) * 1985-05-23 1987-09-29 Kramer & Grebe Gmbh & Co. Kg Cutter head for meat cutter
AU587950B2 (en) * 1987-09-24 1989-08-31 G. Walter Steffens Gmbh & Co. Cutter head for cutters
FR2811914A1 (fr) * 2000-07-21 2002-01-25 Hotimsky Eric R L Dispositif permettant le montage, le reglage, et le verrouillage des couteaux utilises dans les machines dites "cutters" utilisees notamment en charcuterie industrielle
US20090126582A1 (en) * 2005-10-28 2009-05-21 Manfred Knecht Meat Cutter
WO2009082926A1 (fr) * 2007-12-17 2009-07-09 Wai Hong Chan Moyen de broyage et machine de broyage équipée de ce dernier
CN104258952A (zh) * 2014-08-27 2015-01-07 梧州市旺捷机械制造有限公司 涂料粉碎刀

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012595A1 (de) * 1980-04-01 1981-10-08 Walter 5928 Laasphe Feuring Messerkopf fuer kuttermesser
DE3236978A1 (de) * 1982-10-06 1984-04-12 Fleischereibedarf TECMED, 7981 Vogt Kuttermesser mit hack- und emulgierzonen fuer den fleischereibedarf
FR2593086A1 (fr) * 1986-01-22 1987-07-24 Hotimsky Eric Dispositif de montage avec reglage des couteaux pour machines a hacher dites " cutter ".

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US365206A (en) * 1887-06-21 stallman
GB594588A (en) * 1945-02-05 1947-11-14 B & P Swift Ltd An improved drive and method of mounting of knives or cutters for chopping or mincing machines
US2796102A (en) * 1954-05-24 1957-06-18 Cincimati Butchers Supply Comp Rotary meat cutter and shaft assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US365206A (en) * 1887-06-21 stallman
GB594588A (en) * 1945-02-05 1947-11-14 B & P Swift Ltd An improved drive and method of mounting of knives or cutters for chopping or mincing machines
US2796102A (en) * 1954-05-24 1957-06-18 Cincimati Butchers Supply Comp Rotary meat cutter and shaft assembly

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897020A (en) * 1972-08-31 1975-07-29 Techmed Ag Fa Cutter knife for the preparation of meat
US3871590A (en) * 1973-03-06 1975-03-18 G Walter Steffens Blade arrangements for meat cutters
US3937408A (en) * 1973-11-29 1976-02-10 Immanuel Buck Blade arrangement for a meat cutter
US4294415A (en) * 1978-08-22 1981-10-13 Kraemer & Grebe Gmbh & Co. Kg Maschinen- Und Modellfabrik Cutter knife
US4696434A (en) * 1985-05-23 1987-09-29 Kramer & Grebe Gmbh & Co. Kg Cutter head for meat cutter
US4930709A (en) * 1987-09-24 1990-06-05 G. Walter Steffens Gmbh & Co. Cutter head for cutters
AU587950B2 (en) * 1987-09-24 1989-08-31 G. Walter Steffens Gmbh & Co. Cutter head for cutters
FR2811914A1 (fr) * 2000-07-21 2002-01-25 Hotimsky Eric R L Dispositif permettant le montage, le reglage, et le verrouillage des couteaux utilises dans les machines dites "cutters" utilisees notamment en charcuterie industrielle
WO2002007888A1 (fr) * 2000-07-21 2002-01-31 Eric Hotimsky Dispositif permettant le montage, le reglage, le verrouillage des couteaux utilises dans les machines dites 'cutters'
US20090126582A1 (en) * 2005-10-28 2009-05-21 Manfred Knecht Meat Cutter
US9003963B2 (en) * 2005-10-28 2015-04-14 Knecht Maschinenbau Gmbh Blade attachment for meat cutters
WO2009082926A1 (fr) * 2007-12-17 2009-07-09 Wai Hong Chan Moyen de broyage et machine de broyage équipée de ce dernier
CN104258952A (zh) * 2014-08-27 2015-01-07 梧州市旺捷机械制造有限公司 涂料粉碎刀

Also Published As

Publication number Publication date
ES195414U (es) 1975-02-01
DE2027429B2 (de) 1974-03-07
BE767542A (fr) 1971-10-18
DE2027429C3 (de) 1974-10-17
FR2095617A5 (da) 1972-02-11
LU63246A1 (da) 1971-09-01
NL169144C (nl) 1982-06-16
ES195414Y (es) 1975-06-16
NL7106595A (da) 1971-12-07
CH536138A (de) 1973-04-30
DE2027429A1 (de) 1971-12-30
AT324146B (de) 1975-08-11
NL169144B (nl) 1982-01-18
DK126361B (da) 1973-07-09
GB1350452A (en) 1974-04-18

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