EP0254672A2 - Knife-mounting device for a cutter shaft - Google Patents

Knife-mounting device for a cutter shaft Download PDF

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Publication number
EP0254672A2
EP0254672A2 EP87810209A EP87810209A EP0254672A2 EP 0254672 A2 EP0254672 A2 EP 0254672A2 EP 87810209 A EP87810209 A EP 87810209A EP 87810209 A EP87810209 A EP 87810209A EP 0254672 A2 EP0254672 A2 EP 0254672A2
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EP
European Patent Office
Prior art keywords
piston
drive part
screwed
hub body
shaft
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.)
Granted
Application number
EP87810209A
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German (de)
French (fr)
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EP0254672A3 (en
EP0254672B1 (en
Inventor
Walter Schmidt
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Individual
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Priority to AT87810209T priority Critical patent/ATE58654T1/en
Publication of EP0254672A2 publication Critical patent/EP0254672A2/en
Publication of EP0254672A3 publication Critical patent/EP0254672A3/en
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Publication of EP0254672B1 publication Critical patent/EP0254672B1/en
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    • 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 device is known from DE-PS 22 12 374.
  • the knives are pressed axially against a shoulder by means of an annular piston on a cutter shaft of a cutter.
  • the ring piston can be moved on a hub body screwed coaxially into the shaft.
  • the cylinder chamber is connected to a chamber into which a piston screwed into the hub body with a piston rod is immersed.
  • the hub body is screwed into the shaft until the ring piston rests on the knives.
  • the piston is then screwed in, which displaces oil from the chamber into the cylinder chamber.
  • This device has proven very successful. However, it is somewhat difficult to correctly measure the torque on the piston, because emotionally, the effective force is often underestimated due to the low torque required.
  • the present invention is based on the object of developing the described device in such a way that the contact pressure on the knives can be metered precisely. This object is achieved by the characterizing features of claim 1.
  • FIG. 1 for the sake of a better overview, only one half of the axial section of a knife shaft 1 of a cutter with clamped knives is shown.
  • the cutter shaft 1 has an axial bore 2 with an internal thread 3 at its end.
  • a threaded pin 4 a of a hub body 4 is screwed into this.
  • the hub body 4 contains an axial cylinder bore 5, into which a piston 6 is inserted.
  • This has an inwardly projecting piston rod 6a, at the end of which is a thread 6b which engages in an internal thread of the pin 4a of the hub body 4.
  • a locking ring 7 is arranged, which prevents the piston 6 from being inadvertently unscrewed from the hub body 4.
  • the piston 6 has a cylindrical bore 25 and a coaxial threaded bore 26.
  • a screw plug 27 with a cylindrical shaft 28, a cylindrical head 29 and a hexagon socket 30 is screwed into the threaded bore 26.
  • the threaded bore 26 is connected to the chamber 5a via a transverse bore 24.
  • a sleeve-shaped drive part 31 with an external hexagon 32 at the end projecting beyond the piston 6 is in the bore 25 and on the head 29 rotatable and axially displaceable. Between the head 29 and a shoulder 33 of the drive part 31, a prestressed spring plate package 34 is clamped, which presses the drive part 31 against the bottom of the bore 25.
  • a drive ring 36 which is connected in a rotationally fixed manner to the piston 6 via a driver pin 35 and against which the drive part 31 is pressed.
  • the end surface 37 of the drive part 31 has a plurality of radial wedge surfaces 38 which are in engagement with corresponding counter surfaces 39 in the end surface 40 of the ring 36 (FIG. 2).
  • the operation of the clamping device is as follows: After the knife 20 with its clamping and spacer rings 16 to 19 have been put in place, the fully assembled and oil-filled clamping head is screwed into the thread 3 of the knife shaft 1 and tightened by hand as far as possible. Now a key is attached to the hexagon 32 of the drive part 31 and the piston 6 is screwed into the cylinder bore 5. As a result, the oil in the chamber 5a is pressurized, which also propagates into the cylinder space 10. The annular piston 8 is thereby pressed against the clamping ring 17, the axial force acting on it being increased in the ratio of the effective annular surfaces of the space 10 to the annular surface 12.
  • the piston 6 is first unscrewed into the end position shown in the drawing and then the entire clamping head is loosened by hand to the extent necessary for the knife change, i.e. for unhooking and pushing in and pushing out the segment-shaped, sickle-like knives 20 from and into the securing bolts 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Details Of Cutting Devices (AREA)
  • Shearing Machines (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Accessories And Tools For Shearing Machines (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Gripping On Spindles (AREA)
  • Knives (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

The device has a hub body (4) which is screwed into the end face of the knife shaft (1) and on which there is seated an annular piston (8) which acts axially on the knives (20). A piston (6) is screwed into the hub body (4). A drive part (31) having an external hexagon (32) designed to take a spanner is connected via a torque-limiting system (41) to the piston (6). During assembly, the hub body (4) is screwed in until the annular piston (8) rests on the knives (20). When the drive part (31) rotates, the piston (6) displaces oil into the cylinder chamber (10) of the annular piston (8) so that the knives (20) are securely clamped. If a predetermined torque is exceeded, the drive part (31) continues to rotate with respect to the piston (6) by means of a torque-limiting system (41). The optimum contact-pressure force of the annular piston (8) can consequently be precisely adhered to during assembly. <IMAGE>

Description

Eine Vorrichtung gemäss Oberbegriff des Anspruchs 1 ist aus der DE-PS 22 12 374 bekannt. Bei dieser bekannten Vorrich­tung werden auf einer Messerwelle eines Kutters die Messer mittels eines Ringkolbens axial gegen eine Schulter ge­presst. Der Ringkolben ist auf einem koaxial in die Welle eingeschraubten Nabenkörper verschiebbar. Der Zylinderraum ist mit einer Kammer verbunden, in welche ein in den Naben­körper eingeschraubter Kolben mit einer Kolbenstange ein­taucht. Zum Befestigen der Messer wird der Nabenkörper bis zur Anlage des Ringkolbens an die Messer in die Welle ein­geschraubt. Hierauf wird der Kolben eingeschraubt, wodurch Oel aus der Kammer in den Zylinderraum verdrängt wird. Mit einem relativ geringen Drehmoment kann durch die damit er­zielte Kraftübersetzung ein hoher Anpressdruck auf die Messer erreicht werden. Diese Vorrichtung hat sich sehr bewährt. Allerdings ist es etwas schwierig, das Drehmoment auf den Kolben richtig zu bemessen, denn gefühlsmässig wird wegen des geringen erforderlichen Drehmomentes die effektiv wirksame Kraft häufig unterschätzt.A device according to the preamble of claim 1 is known from DE-PS 22 12 374. In this known device, the knives are pressed axially against a shoulder by means of an annular piston on a cutter shaft of a cutter. The ring piston can be moved on a hub body screwed coaxially into the shaft. The cylinder chamber is connected to a chamber into which a piston screwed into the hub body with a piston rod is immersed. To attach the knives, the hub body is screwed into the shaft until the ring piston rests on the knives. The piston is then screwed in, which displaces oil from the chamber into the cylinder chamber. With a relatively low torque, a high contact pressure on the knives can be achieved through the force transmission achieved thereby. This device has proven very successful. However, it is somewhat difficult to correctly measure the torque on the piston, because emotionally, the effective force is often underestimated due to the low torque required.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, die beschriebene Vorrichtung derart weiterzubilden, dass die Anpresskraft auf die Messer genau dosiert werden kann. Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.The present invention is based on the object of developing the described device in such a way that the contact pressure on the knives can be metered precisely. This object is achieved by the characterizing features of claim 1.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung an­hand der Zeichnung erläutert. Darin zeigt:

  • Fig. 1 einen Axialschnitt durch die Vorrichtung, und
  • Fig. 2 eine perspektivische Explosiv-Darstellung von Teilen der Drehmomentenbegrenzung.
An exemplary embodiment of the invention is explained below with reference to the drawing. It shows:
  • Fig. 1 shows an axial section through the device, and
  • Fig. 2 is an exploded perspective view of parts of the torque limit.

In Fig. 1 ist der besseren Uebersicht wegen nur die eine Hälfte des Axialschnittes einer Messerwelle 1 eines Kutters mit aufgespannten Messern dargestellt. Die Messerwelle 1 hat an ihrem Ende eine axiale Bohrung 2 mit einem Innenge­winde 3. In dieses ist ein Gewindezapfen 4a eines Nabenkör­pers 4 eingeschraubt. Der Nabenkörper 4 enthält eine axiale Zylinderbohrung 5, in die ein Kolben 6 eingesetzt ist. Die­ser weist eine nach innen ragende Kolbenstange 6a auf, an deren Ende ein Gewinde 6b sitzt, das in ein Innengewinde des Zapfens 4a des Nabenkörpers 4 eingreift. Am Ende des Gewindes 6b ist ein Sicherungsring 7 angeordnet, der ein unbeabsichtigtes Herausschrauben des Kolbens 6 aus dem Na­benkörper 4 verunmöglicht. Auf dem Nabenkörper 4 sitzt axial verschiebbar ein Ringkolben 8, der durch im Naben­körper 4 eingesetzte Bolzen 9 an einer Drehung gegenüber diesem gehindert wird. Zwischen einer Wand des Nabenkörpers 4 und einer Wand des Ringkolbens 8 ist ein ringförmiger Zylinderraum 10 gebildet, der über Bohrungen 11 mit der Kammer 5a der Zylinderbohrung 5 verbunden ist. Die Kammer 5a und der Raum 10 sind mit Oel gefüllt. Der Nabenkörper 4 hat achsparallele Bohrungen 14, in welche Stifte eines Spezialschlüssels einsetzbar sind, um das Einschrauben des ganzen Spannkopfes in das Gewinde 3 der Messerwelle 1 zu ermöglichen. Zwischen den Teilen 4, 6 und 8 sind Dich­tungen angebracht, die in der Zeichnung nur angedeutet sind. Auf der Messerwelle 1 sind zwischen Spannringen 16, 17 und Distanzringen 18, 19 Messer 20 festgeklemmt. Der Ringkolben 8 stützt sich am Spannring 17 ab und drückt diesen zusammen mit den Messern 20 und den Ringen 18, 19, 16 in der Zeichnung nach rechts gegen einen Ringflansch der Welle 1.In FIG. 1, for the sake of a better overview, only one half of the axial section of a knife shaft 1 of a cutter with clamped knives is shown. The cutter shaft 1 has an axial bore 2 with an internal thread 3 at its end. A threaded pin 4 a of a hub body 4 is screwed into this. The hub body 4 contains an axial cylinder bore 5, into which a piston 6 is inserted. This has an inwardly projecting piston rod 6a, at the end of which is a thread 6b which engages in an internal thread of the pin 4a of the hub body 4. At the end of the thread 6b, a locking ring 7 is arranged, which prevents the piston 6 from being inadvertently unscrewed from the hub body 4. Sitting on the hub body 4 axially displaceable an annular piston 8 which is prevented from rotating relative to the latter by bolts 9 inserted in the hub body 4. An annular cylinder space 10 is formed between a wall of the hub body 4 and a wall of the annular piston 8 and is connected to the chamber 5a of the cylinder bore 5 via bores 11. The chamber 5a and the room 10 are filled with oil. The hub body 4 has axially parallel bores 14, into which pins of a special key can be inserted, in order to enable the entire clamping head to be screwed into the thread 3 of the knife shaft 1. Between the parts 4, 6 and 8 seals are attached, which are only indicated in the drawing. Knives 20 are clamped on the knife shaft 1 between clamping rings 16, 17 and spacer rings 18, 19. The annular piston 8 is supported on the clamping ring 17 and presses it together with the knives 20 and the rings 18, 19, 16 to the right in the drawing against an annular flange of the shaft 1.

Der Kolben 6 hat eine zylindrische Bohrung 25 und eine koaxiale Gewindebohrung 26. In die Gewindebohrung 26 ist eine Verschlussschraube 27 mit einem zylindrischen Schaft 28, einem zylindrischen Kopf 29 sowie einem Innensechskant 30 eingeschraubt. Die Gewindebohrung 26 ist über eine Quer­bohrung 24 mit der kammer 5a verbunden. Ein hülsenförmiger Antriebsteil 31 mit einem Aussensechskant 32 an dem über den Kolben 6 vorstehenden Ende ist in der Bohrung 25 und auf dem Kopf 29 drehbar und axial verschiebbar geführt. Zwischen dem Kopf 29 und einer Schulter 33 des Antriebs­teils 31 ist ein vorgespanntes Federtellerpacket 34 einge­spannt, welches den Antriebsteil 31 gegen den Grund der Bohrung 25 drückt. Am Grund der Bohrung 25 liegt ein mit dem Kolben 6 über einen Mitnehmerstift 35 drehfest ver­bundener Antriebsring 36 auf, gegen welchen der Antriebs­teil 31 gepresst ist. Die Stirnfläche 37 des Antriebsteils 31 hat mehrere radiale Keilflächen 38, welche mit entspre­chenden Gegenflächen 39 in der Stirnfläche 40 des Rings 36 im Eingriff stehen (Fig. 2).The piston 6 has a cylindrical bore 25 and a coaxial threaded bore 26. A screw plug 27 with a cylindrical shaft 28, a cylindrical head 29 and a hexagon socket 30 is screwed into the threaded bore 26. The threaded bore 26 is connected to the chamber 5a via a transverse bore 24. A sleeve-shaped drive part 31 with an external hexagon 32 at the end projecting beyond the piston 6 is in the bore 25 and on the head 29 rotatable and axially displaceable. Between the head 29 and a shoulder 33 of the drive part 31, a prestressed spring plate package 34 is clamped, which presses the drive part 31 against the bottom of the bore 25. At the bottom of the bore 25 there is a drive ring 36, which is connected in a rotationally fixed manner to the piston 6 via a driver pin 35 and against which the drive part 31 is pressed. The end surface 37 of the drive part 31 has a plurality of radial wedge surfaces 38 which are in engagement with corresponding counter surfaces 39 in the end surface 40 of the ring 36 (FIG. 2).

Die Wirkungsweise der Spannvorrichtung ist folgende: Nach dem Aufsetzen der Messer 20 mit ihren Spann- und Distanz­ringen 16 bis 19 wird der fertig montierte und mit Oel ge­füllte Spannkopf in das Gewinde 3 der Messerwelle 1 einge­schraubt und von Hand soweit wie möglich angezogen. Nun wird ein Schlüssel am Sechskant 32 des Antriebsteils 31 an­gesetzt und der Kolben 6 in die Zylinderbohrung 5 einge­schraubt. Das Oel in der Kammer 5a wird dadurch unter Druck gesetzt, der sich auch in den Zylinderraum 10 fortpflanzt. Der Ringkolben 8 wird dadurch gegen den Spannring 17 ge­presst, wobei die auf ihn wirkende Axialkraft im Verhältnis der wirksamen Ringflächen des Raumes 10 zur Ringfläche 12 verstärkt wird. Sobald das Anzugsmoment auf den Antriebs­teil 31 ein bestimmtes Mass übersteigt, laufen die Keil­flächen 38 auf den Gegenflächen 39 auf und der Antriebsteil 31 wird gegen die Wirkung der Feder 34 sichtbar abgehoben und dreht ratternd durch. Die Keilflächen 38, 39 bilden also zusammen mit der Feder 34 eine Drehmomentenbegrenzung 41. Damit wird nicht nur das Anzugsdrehmoment präzise be­grenzt, sondern es wird auch das Erreichen des gewünschten Anzugsmomentes akustisch und optisch angezeigt. Dadurch wird erreicht, dass die Messer 20 weder übermässig noch zu wenig gespannt sind.The operation of the clamping device is as follows: After the knife 20 with its clamping and spacer rings 16 to 19 have been put in place, the fully assembled and oil-filled clamping head is screwed into the thread 3 of the knife shaft 1 and tightened by hand as far as possible. Now a key is attached to the hexagon 32 of the drive part 31 and the piston 6 is screwed into the cylinder bore 5. As a result, the oil in the chamber 5a is pressurized, which also propagates into the cylinder space 10. The annular piston 8 is thereby pressed against the clamping ring 17, the axial force acting on it being increased in the ratio of the effective annular surfaces of the space 10 to the annular surface 12. As soon as the tightening torque on the drive part 31 exceeds a certain amount, the wedge surfaces 38 run on the counter surfaces 39 and the drive part 31 is visibly lifted against the action of the spring 34 and rattles through. The wedge surfaces 38, 39 thus form a torque limitation 41 together with the spring 34. This not only limits the tightening torque precisely, but also indicates that the desired tightening torque has been reached acoustically and optically. This ensures that the knives 20 are neither excessively nor insufficiently tensioned.

Zum Auswechseln der Messer 20 wird zuerst der Kolben 6 in die in der Zeichnung dargestellte Endlage herausgeschraubt und dann der ganze Spannkopf von Hand soweit gelöst, wie dies für den Messerwechsel, d.h. für das Aushängen und das Ein- und Ausschieben der segmentförmigen, sichelartigen Messer 20 aus und in die Sicherungsbolzen 22 erforderlich ist.To replace the knives 20, the piston 6 is first unscrewed into the end position shown in the drawing and then the entire clamping head is loosened by hand to the extent necessary for the knife change, i.e. for unhooking and pushing in and pushing out the segment-shaped, sickle-like knives 20 from and into the securing bolts 22.

Claims (4)

1. Vorrichtung zum Befestigen von Messern (20) auf einer Messerwelle (1) eines Kutters, umfassend einen in die Stirnseite der Welle (1) koaxial zur Welle (1) ein­geschraubten Nabenkörper (4), auf dem ein auf die Messer (20) axial wirkender Ringkolben (8) sitzt, sowie einen in den Nabenkörper (4) eingeschraubten Kolben (6) mit Eingriffs­mitteln (32) zum Drehen mittels eines Werkzeuges, wobei der Kolben (6) mit seiner Kolbenstange (6a) eine Ringfläche (12) bildet, welche eine mit dem Zylinderraum (10) des Ringkolbens (8) kommunizierende Kammer (5a) begrenzt, wo­bei die Ringfläche (12) kleiner ist als die wirksame Fläche des Zylinderraumes (10), dadurch gekennzeichnet, dass im Kolben (6) ein Antriebsteil (31) mit den Eingriffsmitteln (32) drehbar gelagert ist, und dass der Antriebsteil (31) mit dem Kolben (6) über eine Drehmomentenbegrenzung (41) verbunden ist, so dass beim Ueberschreiten eines vorbe­stimmten Drehmomentes der Antriebsteil (31) gegenüber dem Kolben (6) durchdreht.1. Device for fastening knives (20) on a knife shaft (1) of a cutter, comprising a hub body (4) screwed into the end face of the shaft (1) coaxially to the shaft (1), on which a knife body (20) axially acting ring piston (8) sits, as well as a piston (6) screwed into the hub body (4) with engagement means (32) for turning by means of a tool, the piston (6) with its piston rod (6a) forming an annular surface (12) which delimits a chamber (5a) communicating with the cylinder space (10) of the ring piston (8), the ring area (12) being smaller than the effective area of the cylinder space (10), characterized in that a drive part is located in the piston (6) (31) is rotatably mounted with the engagement means (32), and that the drive part (31) is connected to the piston (6) via a torque limitation (41), so that when a predetermined torque is exceeded, the drive part (31) relative to the piston (6) freaked out. 2. Vorrichtung nach Anspruch 1, dadurch gekenn­zeichnet, dass die Drehmomentenbegrenzung (41) eine ra­diale Keilfläche (38) am Antriebsteil (31) und eine ent­sprechende Gegenfläche (39) am Kolben (6) sowie eine die Keilfläche (38) mit der Gegenfläche (39) in Eingriff drückende, vorgespannte Feder (34) umfasst.2. Device according to claim 1, characterized in that the torque limitation (41) has a radial wedge surface (38) on the drive part (31) and a corresponding counter surface (39) on the piston (6) and a wedge surface (38) with the counter surface ( 39) engaging, biasing spring (34). 3. Vorrichtung nach Anspruch 2, dadurch gekenn­zeichnet, dass die Feder (34) einerseits am Antriebsteil (31),andererseits am Kopf (29) einer in den Schaft (6a) des Kolbens (6) eingeschraubten Verschlussschraube (27) anliegt, wobei die Gewindebohrung (26) für die Verschluss­schraube (27) mit der Kammer (5a) kommuniziert.3. Device according to claim 2, characterized in that the spring (34) on the one hand on the drive part (31), on the other hand on the head (29) of a screw (27) screwed into the shaft (6a) of the piston (6), wherein the Threaded bore (26) for the screw plug (27) communicates with the chamber (5a). 4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Gegenfläche (39) an einem in eine axiale Bohrung (25) im Kolben (6) drehfest einge­setzten Ring (36) ausgebildet ist.4. Device according to one of claims 1 to 3, characterized in that the counter surface (39) is formed on a non-rotatably inserted ring (36) in an axial bore (25) in the piston (6).
EP87810209A 1986-05-22 1987-04-06 Knife-mounting device for a cutter shaft Expired - Lifetime EP0254672B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87810209T ATE58654T1 (en) 1986-05-22 1987-04-06 DEVICE FOR ATTACHING KNIVES ON A CUTTER'S CUTTER SHAFT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2074/86 1986-05-22
CH2074/86A CH669339A5 (en) 1986-05-22 1986-05-22

Publications (3)

Publication Number Publication Date
EP0254672A2 true EP0254672A2 (en) 1988-01-27
EP0254672A3 EP0254672A3 (en) 1988-09-21
EP0254672B1 EP0254672B1 (en) 1990-11-28

Family

ID=4225293

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87810209A Expired - Lifetime EP0254672B1 (en) 1986-05-22 1987-04-06 Knife-mounting device for a cutter shaft

Country Status (5)

Country Link
EP (1) EP0254672B1 (en)
AT (1) ATE58654T1 (en)
CH (1) CH669339A5 (en)
DE (1) DE3766438D1 (en)
ES (1) ES2018697B3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH688542A5 (en) * 1994-12-21 1997-11-14 Waelchli Hans Device for knife attachment to a cutter.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740978C (en) * 1938-09-02 1943-11-02 Zahnraederfabrik Augsburg Vorm Safety main coupling for rolling mills
GB1087929A (en) * 1965-08-03 1967-10-18 Landbouwwerktuigen & Maschf Improvements in and relating to safety couplings
DE2212374A1 (en) * 1972-03-15 1973-09-20 Hoegger & Cie Ag Gossau C DEVICE FOR CLAMPING THE KNIVES ON THE KNIFE SHAFT OF A MEAT PROCESSING MACHINE
US3889490A (en) * 1974-05-16 1975-06-17 Felix J Nadolny Torque control adaptor for ratchet wrench

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740978C (en) * 1938-09-02 1943-11-02 Zahnraederfabrik Augsburg Vorm Safety main coupling for rolling mills
GB1087929A (en) * 1965-08-03 1967-10-18 Landbouwwerktuigen & Maschf Improvements in and relating to safety couplings
DE2212374A1 (en) * 1972-03-15 1973-09-20 Hoegger & Cie Ag Gossau C DEVICE FOR CLAMPING THE KNIVES ON THE KNIFE SHAFT OF A MEAT PROCESSING MACHINE
US3889490A (en) * 1974-05-16 1975-06-17 Felix J Nadolny Torque control adaptor for ratchet wrench

Also Published As

Publication number Publication date
ATE58654T1 (en) 1990-12-15
CH669339A5 (en) 1989-03-15
ES2018697B3 (en) 1991-05-01
EP0254672A3 (en) 1988-09-21
EP0254672B1 (en) 1990-11-28
DE3766438D1 (en) 1991-01-10

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