US3600744A - Method for shelling shrimps - Google Patents

Method for shelling shrimps Download PDF

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Publication number
US3600744A
US3600744A US807349A US3600744DA US3600744A US 3600744 A US3600744 A US 3600744A US 807349 A US807349 A US 807349A US 3600744D A US3600744D A US 3600744DA US 3600744 A US3600744 A US 3600744A
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United States
Prior art keywords
shell
shrimp
tail
meat
body portion
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Expired - Lifetime
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US807349A
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English (en)
Inventor
Hendrikus Gerhardus Muller
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.)
Bedrijven Maschf B & S
Nv Machinefabrick B & S Bedrijven Vd Woerdt
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Bedrijven Maschf B & S
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    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C29/00—Processing shellfish or bivalves, e.g. oysters, lobsters; Devices therefor, e.g. claw locks, claw crushers, grading devices; Processing lines
    • A22C29/02—Processing shrimps, lobsters or the like ; Methods or machines for the shelling of shellfish
    • A22C29/024—Opening, shelling or peeling shellfish
    • A22C29/026—Mechanically peeling and shelling shrimps, prawns or other soft-shelled crustaceans

Definitions

  • the present invention relates to shelling shrimps, and provides methods and apparatus by which the shrimps are shelled by automatic mechanism.
  • Another object of the present invention is the provision of apparatus for shelling shrimps, which will be relatively simple and inexpensive to manufacture, easy to install, operate, maintain and repair, and rugged and durable in use.
  • FIG. 1 is a side elevational view of apparatus according to the invention
  • FIG. 2 is a top plan view of the apparatus of FIG. 1;
  • FIG. 3 is a section on the line IIIIII of FIG. 1, showing two devices according to the present invention disposed side by side;
  • FIG. 4 is an enlarged cross-sectional view taken in the same direction as FIG. 1 and showing some of the important operative relationships of the present invention
  • FIG. 5 is a cross-sectional view taken on the line VV of FIG. 4;
  • FIG. 6 is a cross-sectional view taken on the line VIVI of FIG. 5 and showing an end view of the shelling station;
  • FIG. 7 is an enlarged view of a central portion of FIG. 1;
  • FIG. 8 is an enlarged view of a central portion of FIG. 2;
  • FIG. 9 is an enlarged view of a central portion of one of the two devices of FIG. 3.
  • FIGS. 10-12 are views similar to FIG. 5 but showing the position of the parts and the shrimp at three different stages of the shelling operation.
  • FIG. I there are provided a pair of fixed T-beams 1 and 2 which extend between end plates (not shown) of a frame and on which a large number of the shelling devices illustrated in the drawings may be mounted in side-by-side relationship.
  • This side-by-side relationship is indicated in FIG. 3, it being understood that FIG. 3 may be extended indefinitely on either side thereof.
  • Each shelling unit comprises two main groups of parts, to the left and right of the line III-Ill in FIG. 1. Those to the left of that line treat the head and body portions of the shrimp, while those to the right of that line treat the tail portion of the shrimp. It should be borne in mind that in the present apparatus, the shell being stripped from the meat, while the meat is thereafter pushed lengthwise out of the body portion of the shell, by separate mechanisms.
  • brackets 3 and 4 support the leftand right-hand portions of the apparatus, respectively.
  • a shaft 5 carried by bracket4 pivotally mounts a support 6 by which the righthand portion of the equipment is movable toward and away from the remainder of the equipment to perform the tail shellstripping operation referred to above.
  • the beam 1 also carries brackets 7 and 8, while the beam 2 carries a bracket 9.
  • a V-shaped catching member 16 is disposed above conveyor 14 and has upright sidewalls and an open forward end and.a rear'end closed by a curved wall.
  • Catching member 16 is mounted on an arm 17 extending from a horizontal shaft 18 for vertical swinging movement with shaft 18 between a lowered position in which shrimps entering the forward end of member 16 will be caught and held thereby and a raised position in which shrimps previously held by member 16 will be released for further travel on conveyor 14.
  • Levers 19 and 20 rotate shaft 18 to raise and lower catching member 16 in timed sequence by appropriate drive means (not shown).
  • Micromps released by catching member 16 and carried by conveyor 14 then strike a stopping member 22 disposed transversely across conveyor 14.
  • a slide 21 mounted beside and on the upstream side of stopping member 22 with respect to the direction of conveyor travel.
  • Slide 21 has a pusher portion parallel to conveyor 14 and is carried by bar for horizontal sliding movement perpendicular to the direction of conveyor travel to push shrimps detained by stopping member 22 into the shelling station while the conveyor 14 continues to move below.
  • All the shrimps moving along conveyor 14 are oriented in generally the same fashion.
  • an orienting device such as shown in the copending application of the same inventorship herewith, filed under even date herewith and entitled Apparatus for Feeding Articles to a Conveyor in Uniformly Oriented Condition may be used.
  • Shrimps oriented in this way have the curve of their backs forwardmost on conveyor 14, with the tail lowermost as seen in FIG. 8 and the head uppermost as seen in FIG. 8. In this position, the shrimps conform generally to the curvature of catching member 16, and the head of the shrimp extends out of catching member 16; that is, if a shrimp were shown in FIG. 8, only the head would be visible, projecting out of that portion of catching member 16 that is uppermost in FIG. 8.
  • a pin 14 oscillates above conveyor 14, performing a counterclockwise stroke as seen in FIG. 9, in order to engage the projecting head of the shrimp from the underside of the head, and turn any misaligned shrimps clockwise as seen in FIG. 8 until they occupy the desired position in catching member 16. Thereafter, when member 16 rises to release the shrimp, the shrimp will have the proper orientation when it strikes member 22 and is pushed laterally-by slide 21. To this end, pin 24 rotates on a horizontal shaft 25 (FIG. 8) upon actuation of a fork 26 (FIG. 3).
  • the shrimp is fed to the shelling station by being pushed by the pusher portion of slide 21 to the left as seen in FIG. 9, between a fixed lower gripping member 27 and a fixed upper gripping member 28, where the shrimp initially has the position shown in FIG. 10.
  • Slide 21 retreats to the right as seen in FIG. 9, and a gripper 29 then descends from the position shown in FIG. 9 to a position at the back of the shrimp
  • a gripper 30 moves horizontally, to the right as seen in FIG. 9, to coact with gripper 29 to position the shrimp laterally as seen in FIG. 9.
  • gripper 30 is mounted on bar 90 for movement with slide 21.
  • Gripper 30 moves toward the shelling station upon retraction of slide 21. The body of the shrimp between the head and the tail is thus firmly gripped in the shelling station from above and below and from both sides.
  • the tail is straightened out from the FIG. 10 position to the FIG. 1 1 position, where it is in line with the body portion of the shrimp.
  • a horizontal shaft 31 perpendicular to the length of the body portion rotates clockwise as seen in FIG. 7,
  • a chain wheel 33 rotates shaft 31, the shaft 31 being journaled in a support 34 which also carries a bearing bushing 36 in which is journaled the shaft of a plate-shaped stretcher 37 driven by levers 38 and 39.
  • Stretcher 37 rotates in a vertical plane closer to the gripped shrimp than the vertical plane in which pin 32 swings and contacts the shrimp after pin 32 has performed most of the tailstraightening operation. Stretcher 37 further straightens the shrimp and holds the tail during a dwell period. See FIG. 12 for the operative position of stretcher 37.
  • Gripper 30 includes a block 40 having a blade 41 for beheading the shrimp. Compare the FIG. 11 and FIG. 12 positions of the blade 41. As gripper 39 moves into the shelling station, the blade 41 cuts off the head of the shrimp, which then falls away through the spacebetween block 40 and conveyor 14. Notice also that in the FIG, 12 position of block 40, the block 40 has a horizontal opening therethrough in line with the straightened shrimp. An ejector 42 (FIGS. 4 and 12) moves through this hole in block 40 to contact the gripped shrimp and only partially to push the meat out of the shell during a first stage of ejection (FIG. 12). During a second stage of ejection, the meat is pushed all the way out of the body portion of the shell. Ejector 42 is driven through levers 43-47 upon oscillation of shaft 47 (see FIGS. 2 and 7).
  • a plate 48 is downwardly yieldably supported on a vertical coil compression spring assembly 56 and moves under the shrimp's tail (see FIGS. 4, 7 and 10-12) into close adjacency with the lower gripper 27 for the body of the shrimp.
  • the straightened and stretched shrimp tail lies on plate 48.
  • a lower guide 50 and an upper guide 51 (FIGS. 7 and 12) prevent the tall from swinging upwardly or downwardly when straightened.
  • the pin 32 and stretcher 37 move between the plate 48 on the one hand and the guides 50 and 51 on the other hand.
  • a roller 52 rotates on a shaft journaled in bushing 53, the shaft at its other end carrying a gear wheel 54 that meshes with a toothed rack 55.
  • Roller 52 is a segment of a cylinder whose radius is equal to the radius of the pitch circle of gear wheel '54.
  • a horizontal bar 57 is slidable in a fixed housing 58.
  • Rack 55 is fixedly secured to fixed housing 58, while bushing 53 is carried by bar 57 (see FIG. 5). Bar 57 is engaged by a fork 59 (FIG.
  • roller 52 that is swung by oscillation of a shaft 60 to reciprocate bar 57 in housing 58, whereupon gear wheel 54 rolls along and is turned by fixed rack 55 thereby to advance roller 52 to the left and simultaneously to rotate it counterclockwise as seen in FIG. 7.
  • gear wheel 54 rolls along and is turned by fixed rack 55 thereby to advance roller 52 to the left and simultaneously to rotate it counterclockwise as seen in FIG. 7.
  • the purpose of imparting this movement to roller 52 is to cause it to move over the tail portion of the shrimp yieldably supported on plate 48, in order to knead the tail portion of the shrimp to loosen the tail portion of the shell from the meat.
  • an oscillatable horizontal shaft 61 will be seen which carries an arm 62thereon. Proceeding to FIG. 7, it will be seen that the arm 62 extends upwardly to the left and then downwardly and terminates in a plate 63' whose lower edge is recessed about a curve complementary to the cross section of the shell of the shrimp. When the plate 63 is thus in its lowermost position, it will ride the shrimp like a saddle, and will contact the flesh of the shrimp between the separated body and tail portions of the shell of the shrimp, which separation is indicated in FIG. 12. Thereafter, upon clockwise swinging movement of the support 6 as seen in FIG. 1, so that generally speaking the plate 63 moves to the right as seen in F IG. 7, the plate 63 will engage behind the tail portion of the shell and strip the tail portion of the shell from the meat. Oscillation of the shaft 61 can be controlled so that the plate 63 can follow the profile of the tail meat.
  • the fixed gripping members 27 and 28 are provided with inclined teeth that engage with the body portion of the shell.
  • a vertically movable pin 81 extends downwardly through upper gripping member 28 and is selectively engageable with the shrimp to pierce the shell of the shrimp and ex tend into the meat to pinion the meat against endwise displacement during stripping of the tail portion of the shell (see FIGS. 4, 9 and 12).
  • horizontally movable gripper 30 has blunt teeth 84 thereon that are directed toward the shelling station and en'- gage the underside of the body of the shrimp between the legs of the shrimp.
  • fixed pins 85 are provided carried by a support 86 on the machine frame. The pins 85 extend through openings through gripper 30 and between teeth 84in the retracted position of gripper 30 .to clean the gripper 30, as seen in FIG. 5.
  • another horizontal oscillatable shaft 64 is provided that carries an arm 65 that extends upwardly to the left as seen in FIG. 1 and then descends to a free lower end 66 best seen in FIG. 7.
  • Shaft 64 oscillates to raise and lower end 66 so that end 66 moves down to hold down the tail portion of the meat after the tail portion of the shell has been stripped therefrom, and also moves. down to perform a positive ejection of the entire shelled shrimp meat when the meat has been fully pushed from the gripped body portion of the shell by continued movement of ejector 4,2 to the right as seen in FIG. 12.
  • End 66 thus serves as a meat product ejector for forcing the meat productdown into the discharge chute 93 best seen in FIG. 1.
  • Ejection of Body Shell Mounted for rotation on a horizontal shaft 67 is an arm 69 that carries an ejector 68 for the body portion of the shell which is gripped between the fixed gripping members 27 and 28.
  • Shaft 67 is driven by bevel gears 70 and chain wheels 71 (FIG. 7).
  • Ejector 68 rotates clockwise as seen in FIG. 6, while the gripper 30 is moving to the left and the slide 21 is also moving to the left to insert a new shrimp. Ejector 68 thus moves ahead of the advancing new shrimp into and through the shelling station and out of the shelling station behind gripper 30.
  • Ejector 68 is in the form of a pin that is inclined at an acute angle to the direction of conveyor movement such that the ejected body shell portion is moved somewhat to the left as seen in FIG. 8 upon ejection, so that it falls about where the head fell.
  • gripper 29 is in its raised position when ejector 68 makes its ejection stroke.
  • Tail Shell Ejection In the event the tail shell portion remains between the members 48, 50 and 51, an ejector for the tail shell portion is provided, as well as a cleaner for the roller 52.
  • An upright bearing bushing 72 supports a vertical shaft at whose upper end is secured a fork 73 oscillatable by an axially reciprocable horizontal shaft 74. At its lower end, this vertical shaft carries ejector 75 that swings in a horizontal plane between the plate 48 and the guide 50, on the one hand, and the guide 51 on the other hand, clockwise as seen in FIG. 8, thereby to eject the possibly remaining tail portion of the shell and/or other bits of the shrimp.
  • the vertical shaft in bushing 72 also carries at its lower end an arm 76 that passes above the upper guide 51 and that at its free end carries a vertically disposed arcuate segment 76 whose inner concave edge moves across the arcuate periphery of roller 52 in closely spaced relationship thereby to strip away any particles of flesh or shell that remain on the working surface of roller 52.
  • the axial reciprocatory movement of shaft 74 and hence the cleaning and ejection functions just described take place when the parts carried by support 6 are in their fully retracted position.
  • the pin 24 performs a transverse stroke to ensure accurate orientation of the shrimp in catching member 16.
  • Member 16 then moves upwardly and the shrimp moves on until it abuts the stopping member 22 and the slide 21 pushes it in correct orientation into the shelling station between gripping members 27 and 28. At this point, the parts are in the position of FIG. 10.
  • the bar 90 which carries the slide 21 and the gripper 30 and the block 40 and the blade 41 then begins to retract; and as soon as it has moved sufficiently far to the right as seen in FIG. 6, the gripper 29 descends and engages the back of the shrimp. Then the shaft 31 rotates clockwise as seen in FIG. 7 until the pin 32 moves from its FIG. position to its FIG. 11 position, and the parts are otherwise positioned as shown in FIG. 11.
  • the stretcher 37 swings to hold the tail of the shrimp while the blade 41 beheads the shrimp and the gripper 30 with its teeth 84 engages the underside of the body of the shrimp.
  • the blades 82 and 83 are thus brought together sufficiently to sever a portion of the shell of the shrimp.
  • the timing of the movement of the gripper 30 relative to the movement of the pin 32 is of course such that the gripper 30 has not moved sufficiently close to the shrimp to interfere with straightening movement of the tall at the time that the pin 32 first straightens the tail of the shrimp.
  • blade 91 descends and cuts through the peritoneum of the shrimp and immediately retracts.
  • the arm 65 moves until its lower end 66 is just above the tail portion of the shrimp.
  • the ejector 42 then moves to the left in FIG. 12 until it has pushed the shrimp meat only part way through the gripped body portion of the shell, to the FIG. 12 position.
  • the meat carries alongthe tail portion of the shell, so that the tail portion is separated from the body portion of the shell.
  • the ejector 42 then is momentarily arrested.
  • the pin 81 (FIG. 12) then descends and penetrates the shell and into the meat, in order to hold the meat stationary while the tail portion of the shell is stripped away.
  • the support 6 moves to the left as seen in FIG. 7 so that the roller 52 rolls over the tail portion of the shell and kneads the meat in the shell thereby loosening the tail portion of the shell from the tail meat.
  • the tail is pressed against the yielding plate 48.
  • the bar 57 which was moved fully toward the shelling station, is then partially retracted to the right so that roller 52 rolls back over the tail section of the shell but not entirely off the tail section of the shell.
  • the arm 62 descends until the plate 63 is saddled over the meat between the separated body portion and tail portion of the shell.
  • the plate 63 engages the left end of the tail section of the shell as seen in FIG. 12, and upon further rightward movement of plate 63 as seen in FIG. 7, strips the tail section of the shell from the meat.
  • the pin 81 is then raised and the ejector 42 completes its working stroke to the right in FIG. 12, forcing the meat completely out of the body portion of the shell.
  • the meat free from both shell sections, then drops into the chute 93.
  • the lowerend 66 of arm 65 descends to make sure that the meat is forced down into the discharge chute, and then rises again.
  • the arm 63 also rises again to make way for the next shrimp.
  • the rod 74 reciprocates, and the ejector 75 moves between the lower members 48, 50 and the upper member 51; while at the same time, the arm 76 moves the arcuate segment 76 over the working surface of roller 52 to clean the same.
  • Ejector 42 is retracted from the block 40 and gripper 29 ascends.
  • Slide 21 now starts the next working stroke with a fresh shrimp and the block 40 begins to retract from the shelling station, moving downwardly as seen in FIG. 12.
  • the ejector 68 rotates clockwise as seen in FIG. 6 to eject the body portion of the shell from between the fixed gripping members 27, 28.
  • the pins move through openings in gripper 30 to eject any shrimp particles that might be clinging to the teeth 84 or the blade 83.
  • a method for shelling curled shrimps comprising gripping the body of the shrimp, straightening the tail of the shrimp into line with the body, cutting off the head of the shrimp, severing the shell of the shrimp intermediate its length into a body portion and a tail portion of the shell, pushing the meat only part way out of the body portion of the shell in the direction of the tail thereby to space said tail portion of the shell from said body portion of the shell, stripping the tail portion of the shell from the tail, and then pushing the meat in the direction of the tail the rest of the way out of the body portion of the shell.
  • Apparatus for shelling shrimps comprising means for gripping the body of the shrimp, means for straightening the tail of the shrimp into line'with the body, means for cutting off the head of the shrimp, means for severing the shell of the shrimp intermediate its length into a body portion and a tail portion of the shell, and for pushing the meat only part way out of the body portion of the shell in the direction of the tail thereby to space said tail portion of the shell from said body portion of the shell, means for stripping the tail portion of the shell from the tail, and means for then pushing the meat in the direction of the tail the rest of the way out of the body portion of the shell.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Food Science & Technology (AREA)
  • Processing Of Meat And Fish (AREA)
  • Meat, Egg Or Seafood Products (AREA)
US807349A 1968-03-14 1969-03-14 Method for shelling shrimps Expired - Lifetime US3600744A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6803635.A NL159862C (nl) 1968-03-14 1968-03-14 Werkwijze voor het een voor een pellen van gekookte en daardoor gekromde garnalen en inrichting voor het uit- voeren van de werkwijze.

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US3600744A true US3600744A (en) 1971-08-24

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ID=19803031

Family Applications (2)

Application Number Title Priority Date Filing Date
US807349A Expired - Lifetime US3600744A (en) 1968-03-14 1969-03-14 Method for shelling shrimps
US133594A Expired - Lifetime US3691591A (en) 1968-03-14 1971-04-13 Apparatus for shelling shrimps

Family Applications After (1)

Application Number Title Priority Date Filing Date
US133594A Expired - Lifetime US3691591A (en) 1968-03-14 1971-04-13 Apparatus for shelling shrimps

Country Status (9)

Country Link
US (2) US3600744A (cs)
JP (1) JPS5234560B1 (cs)
DK (1) DK131318B (cs)
FR (1) FR2003934A1 (cs)
GB (1) GB1268207A (cs)
IS (1) IS1832A7 (cs)
NL (1) NL159862C (cs)
NO (1) NO123879B (cs)
SE (1) SE348627B (cs)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987644A (en) * 1990-04-10 1991-01-29 Fletcher Seafoods, Ltd. Shell cutting method for processing shrimp
US20150147946A1 (en) * 2013-11-27 2015-05-28 Rue Liang System for washing, deveining and peeling shrimp
US11980199B2 (en) 2020-02-07 2024-05-14 Nova-Tech Engineering, Llc Shrimp processing apparatus and methods
US12029222B2 (en) 2021-02-05 2024-07-09 Nova-Tech Engineering, Llc Shrimp processing system, processing apparatus and methods

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU504149B2 (en) * 1976-02-16 1979-10-04 Daieigiken Inc. Scraping off heads of fishes
US4912810A (en) * 1988-04-22 1990-04-03 Duzitall Equipment Corporation Method and apparatus for peeling crustaceans
GB9409908D0 (en) * 1994-05-18 1994-07-06 Duffy Brian Apparatus for bisecting an organic material
US6099400A (en) * 1998-02-06 2000-08-08 Brontec Limited Method and apparatus for processing shrimp

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1367546A (en) * 1919-04-11 1921-02-08 Matton Assignor Machine for deheading shrimps
US2716776A (en) * 1952-01-11 1955-09-06 Tait Clark Streich Machinery C Shrimp processing apparatus
US3122777A (en) * 1960-07-07 1964-03-03 Jonsson Gregor Machine for cleaning shrimp
US3310832A (en) * 1964-12-17 1967-03-28 Seafoods Automation Corp Apparatus for processing shrimp

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3566437A (en) * 1968-12-16 1971-03-02 Gregor Jonsson Associates Inc Shrimp processing machine and method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1367546A (en) * 1919-04-11 1921-02-08 Matton Assignor Machine for deheading shrimps
US2716776A (en) * 1952-01-11 1955-09-06 Tait Clark Streich Machinery C Shrimp processing apparatus
US3122777A (en) * 1960-07-07 1964-03-03 Jonsson Gregor Machine for cleaning shrimp
US3310832A (en) * 1964-12-17 1967-03-28 Seafoods Automation Corp Apparatus for processing shrimp

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987644A (en) * 1990-04-10 1991-01-29 Fletcher Seafoods, Ltd. Shell cutting method for processing shrimp
US20150147946A1 (en) * 2013-11-27 2015-05-28 Rue Liang System for washing, deveining and peeling shrimp
US9095149B2 (en) * 2013-11-27 2015-08-04 Rue Liang System for washing, deveining and peeling shrimp
US11980199B2 (en) 2020-02-07 2024-05-14 Nova-Tech Engineering, Llc Shrimp processing apparatus and methods
US12029222B2 (en) 2021-02-05 2024-07-09 Nova-Tech Engineering, Llc Shrimp processing system, processing apparatus and methods

Also Published As

Publication number Publication date
DK131318B (da) 1975-06-30
JPS5234560B1 (cs) 1977-09-03
GB1268207A (en) 1972-03-22
IS1832A7 (is) 1969-04-05
SE348627B (cs) 1972-09-11
US3691591A (en) 1972-09-19
DE1912595B2 (de) 1977-07-07
NL159862C (nl) 1979-09-17
DE1912595A1 (de) 1969-10-09
DK131318C (cs) 1975-11-24
FR2003934A1 (cs) 1969-11-14
NO123879B (cs) 1972-01-31
NL6803635A (cs) 1969-09-16

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