• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A cutter-bit assembly employs an arcuate wedge 16 to secure a cutter-bit 2 within a pocket 4 of a holder 1. An additional deformable insert or resilient backing piece 18 is also located in an arcuate gap between the cutter-bit shank and a curved surface of the holder. The insert or backing piece co-operates with teeth 19 to lock the wedge in position.
    公开号:SU1375144A3
    申请号:SU853850148
    申请日:1985-02-04
    公开日:1988-02-15
    发明作者:Бройер Освальд；Штайнкуль Бернд；Ролинг Франц；Хессе Норберт；Расманн Христоф；Шооп Гюнтер-Дитмар；Хелткен Вернер
    申请人:Геверкшафт Эйзенхютте Вестфалия (Фирма)；
    IPC主号:
    专利说明:

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    surface for arcuate wedge (DC) 16. The back surface 17 of the vertical wall 8 is rounded and with the surface 15 forms a wedge gap for DC 16. From the end opening 7 of DC 16 tapers towards the end lying on the side of the vertical wall 8. The DC 16 is fixed with a wedge a shutter in the form of a locking element 18 installed in a wedge gap between at least one of the two wedge surfaces of the DK 16 and the corresponding wedge counterpoles
    surfaces, and the locking gear 19 at DK 16. The locking element I8 is made of plastic or elastic plastic material and is placed in a blind hole 22 with a tapered bottom 23. When installing DK 16, the locking element is deformed under the action of it. Due to its spring elasticity, the locking element engages and presses into the depressions between the locking teeth of the gear teeth 19 and securely secures the cutter 2. 30 Cp. f-ly, 18 ill.
    one
    The invention relates to the mining industry, namely to devices for fastening the tool, in particular for coal plow.
    The aim of the invention is to improve the reliability of the attachment of the cutter and to facilitate disassembly when changing worn or damaged parts.
    Figure 1 shows the proposed device, a longitudinal section; figure 2 is a cutter with an inserted plastic locking element, side view; on fig.Z - plastic locking element; Fig. 4 shows a side wedge with locking gears, side view; fig.Z - the same view of the arcuate inner side; Fig. 6 is a part of an arcuate wedge having a toothed locking engagement; Fig. 7 illustrates a first exemplary embodiment of the proposed device; on Fig - its arcuate wedge with a plastic locking element, type of reconciliation; figure 9 is the same, view of the inner side of the arc; 10 shows a second exemplary embodiment of the proposed device, a side view of a cutter freed from the tool holder; in fig. 11 - arcuate wedge, side view; on Fig and 13 is a plastic locking element of the arcuate wedge in Fig.11, the section and the end view; on Fig - plastic locking element on Fig and 13 in a modified version,
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    end view; FIG. 15 is a third embodiment of the device according to the invention, side view of an arcuate wedge with a fixing segment installed on it; Fig. 16 is an arcuate wedge of Fig. 15, side view and with a modified form of the implementation of the fixing segment; Figure 17 illustrates a preferred embodiment of the fixture used in the embodiment of the device of Figure 1; on Fig - fixing device according to Fig in the unloaded position, a partial section.
    The device for fastening the tool, in particular for a coal plow, consists of a tool holder 1 and a tool 2, the cutting edge 3 of which is formed by a hard metal insert. The toolholder 1 is fixed to a support on a coal pillar or the like, for example, by welding. In order to receive the plate-shaped cutter 2 on the tool holder, a recess is provided in the form of a pocket 4 in which the cutter 2 with its body 5, having the form of a plate, can be inserted sideways. On the reverse side, pocket 4 is bounded by a caraman wall 6 having a slot. On the opposite end, which is located in front of the cutting direction in the pocket 4, there is an end opening 7, which is located behind the vertical wall 8, i.e. a vertical wall 8 and a bottom 9 of a karaman 4 in which a hole 10 is provided in the bottom. The 6-pocket wall, the vertical wall 8 and the bottom 9 of the pocket connect both parallel side walls 11 of the pocket, in which the pin-down finger 12 is held transversely in the transverse direction, placed near the back back wall 6 of the caraman and forming a cylindrical surface of the cutter . The cutter 2 consists of a plate, which at the rear end has an approximately semi-circle-shaped supporting surface 13 in the form of a mold, with which the cutter 2 in the assembled position rests on a cylindrical contact surface for a finger cutter 12. The supporting plate 13 of the cutter, having the shape of a mold, forms at the rear end of the cutter, a protrusion 14, which is covered in the form of a hook by a finger 12 from behind.
    The incisor 2 at the front end of the incisor body 5, which enters the pocket 4 of the incisor, has a recess with an arcuate end surface 15 which forms the Kli. a new counter-surface for the arcuate wedge 16. The opposite surface of the vertical wall 17 to the pocket 4 is roundly rounded and forms, together with the concave end surface 15 of the cutter 2, the arcuate wedge gap which narrows from its end extending from the end hole 7, the toolholder 1, toward the end lying on the other side of the vertical wall 8. The arcuate wedge 16 has an arc length of approximately 180 to 200 °.
    Dp of receiving connections cutter 2 with its body 5 cutter is pivoted into the pocket 4 of the cutter so that its bearing surface 13 is in the form of a mold adjacent to the cylindrical pin 12. In the position of the cutter 2 shown in Fig. 1, the arcuate wedge 16 is inserted through the cutter holder face 7, as a result of which the tool is firmly locked in the pocket under the wedge action. The arcuate Kli 16 in this case rests on the wedge counter-surfaces 15 and 17, which limit the wedge gap. In order to prevent the arcuate wedge 16 from being separated, a locking device is provided in the form
    the wedge gate lying in a wedge gap.
    In the proposed device (FIGS. 1-6) this wedge gate consists of a deformable locking element 18 on the end surface 15 of the cutter body 5 and a locking gear 19 at the arcuate wedge 16.
    The locking element 18 is made of plastic, preferably of elastic plastic material with a hardness of A-Shore from about 80 to 100, preferably 90. A material of synthetic resin (volcol) of specified hardness is particularly suitable. The locking element 18 (Fig. 3) consists mainly of cylindrical a cork-shaped body, which at both ends has a bevel of 20 edges around the perimeter with an angle of inclination, for example, 30. At the circumference, the plastic cylindrical locking element 18 has a flattened axially along its entire length 21. Alternatively, an axially grooved or axially extending hole or the like may be provided thereto. An arc-shaped end surface 15 of the cutter body 5 is provided with a notch in the form of a blind hole 22 with a tapered bottom 23, in which When pressed, the plastic stopper element 18 is held in place. Since the plastic stopper element 18 is symmetrical, it can be inserted into the blind hole 22 on one side or the other as desired. The bevels 20 on the side of the ends facilitate the pressing into the blind hole 22. The flattening 21 on the locking element 18 makes it possible to remove air from the blind hole 22 when pressing in the plastic locking element. The same purpose would serve a longitudinal groove or longitudinal hole on the locking element. In the inserted position, the locking element 18 protrudes by a length that corresponds to the length of the bevel 20 edges and is from 0.5 to 1.5 mm, preferably 1 mm, from the blind hole 22 beyond the end surface 15 of FIG. 2).
    The arcuate wedge 16 consists of a part of the forging, into which the fixing gear is then additionally embedded.
    513
    (Fig.6). The latter extends only over a portion of the length of the arcuate wedge, about the angle of the arc from 60 to 70. Tooth 24 toothed locking gears 19 are inclined in the direction P of the insertion of the arcuate wedge 16, while the lateral surface of the tooth 25 lying in front in the direction of insertion is inclined more than their (in the direction of insertion)
    The posterior side surface of the tooth 26. The lateral surfaces of the teeth 23 form an approximately right angle and sharp edge with the surface of the tooth head 27. The smaller inclined lateral surfaces of the teeth by rounding 29 pass into the surface of the tooth head 27. The lateral surfaces of the teeth 25 and 26 are 45 friend angle
    . relative to the other, while the angle of the first tooth in the row of teeth, which is closest to the thin end of the arcuate wedge, may also be greater ..
    The locking gear 19, when inserting the arcuate wedge 16, passes by the plastic locking element 18, which at the same time settles and, on the basis of its bar elastic, enters and presses into the hollows between the locking teeth 24. Thus, the arcuate wedge 16 is reliably prevented from loosening and extending. The arc-shaped wedge 16 has, at its thick and thin ends of the wedge, molds 30 and 3, respectively, into which a mandrel can be inserted to insert or remove the arc-shaped wedge. In order to release the wedge clamp and allow the cutter 2 to be pulled out of the pocket 4 of the tool post 1, the arcuate wedge 16 is pushed back with the aid of a mandrel. Since the tooth 24 of the locking gear 19 in the direction of pushing out is tight with the sharp edges 28, when pushing out the arcuate wedge, the material of the plastic locking element 18 between the teeth 24 is cut off. In the event that the worn cutter 2 is restored again, the plastic locking element 18, which is located in the blind hole 22, can be replaced with a new locking element. The arcuate wedge 16 allows repeated use.
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    The blind hole 22 is located near the transition region between the cutter body 5 and the outside part of the cutter 2. The blind hole 22 is offset relative to the longitudinal center axis passing through the back surface of the cutter adjoining the hole to insert the pocket 4, since the main clamps the forces act in the region of this axis M. The section of the arcuate wedge 16, which carries the locking gearing 19, extends approximately from the middle of the arcuate wedge to a place that is located and from the thin end of the arcuate wedge.
    In the first example of the implementation of the proposed device (Fig.7-9), the plastic locking element 18 is installed on the arcuate wedge 16, approximately in its middle. Dutob-: a different wedge 16 has a lateral recess 32, which according to Fig.9 has a depth equal to half the thickness of the arcuate wedge 16. The recess 32 extends across the entire width of the arcuate wedge 16. The plastic stopper element 18 held by press fit in the lateral recess 32 of the pocket , it is pushed so that it projects both behind the wedge surface 33, located on the outer side of the arc, and beyond the wedge surface 34, which lies on the inner side of the arc of the arcuate wedge 16. The protruding parts are designated by the positions 35 and 36. In addition, the plastic The locking element protrudes also toward the side surface 37 of the arcuate wedge 16, as shown in Fig. 9 by the position 38. When inserting the arcuate wedge, the protruding portion 35 of the locking element comes into friction abutment with the arcuate end surface 15, the protruding portion 36 —in a frictional parachute with an arcuate rear surface of the vertical wall 17, a protruding lateral surface 38 of the stopper element — into a frictional fit to one of the two side walls of the toolholder 1 pocket. In this way, a friction closure is achieved, which securely holds the inserted arcuate wedge 16 in the wedge clamp.
    It is also possible to place the plastic side element 18 in through transverse drilling in the arcuate wedge 16, and it is also possible to provide a locking gear on at least one of the two wedge counter-surfaces 15 and 17, preferably on the surface 15 of the cutter 2. interoperable with plastic stop element mounted on arcuate wedge 16.
    As shown in FIG. 10, the cutter 2, on its face surface 15, has a section with locking gear teeth 19, which may correspond to the same section 19 in FIGS. 1-6. The portion bearing the gear locking engagement of the end surface 15 is located between the middle axis M and the junction between the tool body 5 and the part of the tool lying outside. Figure 11 shows an arcuate wedge 16, which is about half of its length on its arcuate outer side 33 has a recess or blind hole 22, in which a plastic locking element is held with a press fit. 39. Round plastic locking element 39 has a conical bottom recess AO. On its outer side, it carries shaped parallel ribs 41, which, when inserted into the arcuate wedge 16, interact with (locking gear teeth 19 on the front surface 15 of the cutter 2. Instead of the linear ribs 41, arcuate or Vr-shaped ribs ( Fig. 14). It is possible not to use edges at all.
    On Fig shown arcuate wedge 16, which is connected to the fixing segment 42 of the metal. The locking segment 42 runs along the outer arc of the arcuate wedge 16 and is removably fixed on it. In this case, the fixing segment 42 is supported near the thick end of the arcuate wedge on the multifunctional arm 43, whereas near the thin end of the arcuate wedge 16 it is detachably fixed to the latter by means of the clamping sleeve 44, which is inserted into the coaxial cross drilling of the locking segment 42 and arcuate wedge. By this, the fixing segment is securely fixed on the arcuate wedge 16.
    The arc-shaped wedge 16 with the de-segmenting segment 42 shown in FIG. 15 can be used with the cutter installation shown in FIG. 1, in which a plastic strut element 18 is installed on the end surface 15 of the cutter 2. When changing the cutter before the arc-shaped wedge 16 will be released from the joint, first the clamping sleeve 44 is released, in re. as a result, the connection between the arcuate wedge and the fixing segment is released. Then the arcuate wedge 16 with the mandrel attached to the thin end of the wedge, can be pushed out without taking with itself the fixing segment 42,
    FIG. 16 shows a modified form of implementation in which the locking segment 45 is removably attached to the arcuate wedge 16 and provided with elastic locking fingers 46, which protrude in a part of the circumference of the metal part of the segment and then bent out of the plane of the arcuate locking segment. On the corresponding end surface 15 of the cutter there is a locking gear 19. When inserting the arcuate wedge 16 into the arcuate wedge gap between the vertical wall 8 and the end surface 15 of the cutter, the elastic locking fingers 46 can freely pass through the tooth of the locking gear 19, while each time elastic go into the hollows between the teeth of the locking gear teeth 19. As a consequence, the inserted arcuate wedge 16 is held in its wedge clamp. In order to release The arcuate wedge 16, firstly, the connection 44 of the fixing segment 45 with the arcuate wedge 16 is released so that the arcuate wedge can be pulled out without catching the fixing segment 45. For the circuit connection of the fixing segment with the thin end of the arcuate wedge 16 instead of the clamping sleeve 44 other means of joining are used, for example, in the form of a pin or drilling of a pin. The locking segment 42 or 45 may be smaller than the arcuate wedge 16. It is inserted into the corresponding arcuate recess on the arcuate outer side of the arcuate wedge and may be attached only at the thin end of the wedge, while near the thicker end of the wedge it rests on shoulder in the form of a trough or held by means of another inserted fastener. Along its length, the toothless locking segment 42 is made smooth.
    On Fig and 17 shows the installation of the cutter with the advantageous further implementation of the locking device. At the same time, in through axial drilling 47 of the locking element 18, consisting of visco-elastic plastic and having the shape of a plug, a metal pin 48 is held with a press fit, which passes through the locking element 18 along its entire length. The metal pin .48 is preferably steel and has a length that is somewhat greater than the depth of the recess 22, made as a blind drilling. With its inner end, the metal pin 48 rests at the very depth of 49 blind holes 22. In the undeformed position shown in Fig. 18, the plastic locking element 18 acts as a blind hole from the blind holes 22. The outer end of the metal pin 48 ends approximately along with the outer end surface 50 of the plastic locking element 18.
    When the arcuate wedge 16 in the direction of the arrow P is inserted into the wedge gap, the plastic locking element 18 is pushed back into the recess or blind hole 22 by the locking gear 19 of the arcuate wedge 22. At the same time, the visco-elastic plastic material of the cork-shaped locking element 18 is fixed by means of the locking gear. the engagement 19 of the arcuate wedge 16 is slightly displaced in the direction of the arrow P, while the metal pin 48, when supported at the greatest depth of the drilling 49, is easily installed is cast into an inclined position so that the locking gear 19 of the arcs of the wedge 16 can pass through it. The sawtooth of the teeth of the locking gear of the gearing 19 of Fig. 6) facilitates the transition of the metal pin 48 through the locking 0
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    When engaging the arcuate wedge 16. When the arcuate wedge 16 is firmly inserted, the metal pin 48 with its outer end enters the hollow of the mezvdu with two locking gear teeth 19. Simultaneously, the plastic material of the locking element I8 is pressed into the hollows between the locking teeth of the gear teeth. FIG. 17). The arcuate wedge 16 against loosening and loosening is held on one side by frictional and geometric closure using plastic material of the locking element 18, on the other hand also by geometric closure with a metal pin 48. Even when pushed into the hollows between the teeth of the fixing gear teeth 19, the plastic material is cut, with the help of a metal pin 48, the arcuate wedge 16 is held in its clamp. When the arcuate wedge 16 is retracted by hammering the thin end of the wedge with a hammer, the plastic material of the locking element 18 is first displaced against the direction of the arrow P and then cut into the part of the fixing gear teeth 19 pressed into the hollows between the teeth of the locking gear 19. The metal pin 48 is set under the small tilting to the axis of the blind hole to get out of the gearing in the hollow of the locking gear teeth 19. By further strong blow with a hammer on the thin end of the arcuate Kli 16, when the outer end of the metal pin 48, which penetrates into the cavity between the teeth, is deformed or cut, blocking can be released.
    Instead of a metal or steel pin 48, other metal elements with the same or similar action, such as metal elements in the form of plates, can also be embedded in the plastic locking element 18. At the same time, several metal elements can be embedded in the plastic material of the locking element, which, when inserted into the arcuate wedge 16, penetrate into the adjacent depressions between the teeth of the locking gear teeth 19.
    权利要求:
    Claims (2)
    [1]
    Invention Formula
    1. A device for fastening the tool, in particular for a coal plow and the like, consisting of a tool holder and a tool that is mounted inserted into the tool holder pocket, while on the tool holder. There are on the back side of the contact surface on which the tool is supported and an end face located in front of the cutting direction is a vertical wall and an end opening for an arcuate wedge, which is mounted through an end opening in the formed between the vertical wall and the end surface the arcuate wedge gap, while for fixing the inserted arcuate wedge a locking device is provided, characterized in that, in order to increase the reliability
    These tools protrude from the pocket of the tool holder, and the locking gearing is located at the blunt-arc wedge portion, and this toothed portion starts in the middle of the bow-shaped wedge and ends at some distance from the thin end of the bent wedge.
    ) Q 4. The device according to Clause G-3, characterized in that the locking element is made of plastic.
    5. The device according to claims 1-4, characterized in that the stopper
    15 The element is made of an elastic plastic material with a hardness of A-Shore of approximately 80-100, preferably 90.
    6, The device according to claims 1-5, about tl and 20 such that the plastic locking element is designed in the form of a cylindrical body in the form of a plug.
    7. The device according to claims 1-6, about tl and attaching the cutter and facilitating disassembly is often due to the fact that when the worn or damaged parts are changed, the fixture fixture consists of a wedge gate installed in an arc-shaped gap of at least one of both wedge surfaces of the arcuate wedge and the corresponding wedge counter-surfaces through a frictional and / or closure, in which a locking element is deformed under the wedge action of the arcuate wedge, while locking element - the wedge surface of the wedge or kontrpoverhnost provided with locking toothing.
    2. A device according to Claim 1, characterized in that the locking element is installed in a recess on the arcuate end surface of the cutter, and from the end side protrudes from this recess into the wedge gap, and the arcuate wedge on its wedge surface formed by the outer arc-shaped surface, has a locking gear.
    [2]
    3, The device according to PP.1 and 2, o t - that the notch
    arched end surface.
    10. At trial of samples
    the cutter is offset with respect to the longitudinal middle axis passing through the back surface of the cutter and in the transition zone to the part of the cutter protruding from the pocket of the toolholder, and the locking gear is located on the arc section of the arc-shaped wedge, this gear portion starts in the middle of the arc-shaped wedge and ends at some distance from the thin end of the arcuate wedge.
    4. The device according to p. G-3, characterized in that the locking element is made of plastic.
    5. The device according to claims 1-4, characterized in that the stopper
    the element is made of an elastic plastic material with a hardness of A-Shor approximately 80-100, preferably 90.
    6, The device according to Claims 1-5, which is one in which the plastic locking element is designed as a cylindrical body in the form of a plug.
    7. A device as claimed in Claims 1-6, the latching element has a metal element passing through it, in particular a metal chaff, one end of which rests against the bottom of the receptacle that receives it, and the other end goes into the hollow when the arcuate wedge is inserted between the teeth of the locking gear.
    8. The device according to PP.1-7, about tl and - the fact that the metal pin is made in the form of a steel pin.
    9. The device according to Ш1.1-8, about tl and - that the metal pin is installed with a fit in the axial hole of the cork-shaped plastic stopping element and has a length greater depth of the notch, fulfilled as a blind hole, at the same time, the metal puff rests at the greatest depth of the blind hole with its inner-nagging end, and its outer end facing the locking gearing protrudes from the blind hole and ends off with the non-deformed plastic locking element its face surface.
    10. Device pp, 1-9, about t of l and - alternating with the fact that a cork-shaped plastic locking element is at least one of its
    the end, preferably at both ends, has a bevel of edges running along the perimeter.
    11. The device according to claims 1-10, about tl and that the plastic locking element has at least one through groove or flattening and / or axial through hole.
    12. The device according to claims 1-11, which is based on the fact that the recess on the arcuate end surface of the tool is made in the form of a blind hole with a conical base.
    13. The device as claimed in Claims 1-12, which has the fact that the protruding part, on which the locking element protrudes from the recess on the arcuate end surface of the tool, is equal to the axial length of the bevel along the perimeter of the edges and is preferably from 0 5 to 1.5 mm.
    14. The device according to claims 1-13, from the fact that the teeth of the locking gear teeth are inclined in the direction of insertion of the arcuate wedge, while their front surfaces in the direction of insertion are 30 wedge.
    more abrupt, they form a sharp edge with the surface of the tooth head, preferably with a contact angle of about 90, and the oblique side of the teeth, which is located behind in the direction of insertion, rounds into the surface of the tooth head.
    15. The device according to Claims 1-14, that is, that the lateral surfaces of the teeth are at an angle of 45 one relative to the other.
    16. The device according to claims 1-) 5, t - characterized by the fact that the plastic stopper element is mounted on an arcuate wedge, while the arcuate face surface of the cutter is provided with a locking gear.
    17. A device as claimed in Claims 1-16, characterized in that the plastic locking element projects beyond the wedge surface located on the outer side of the arc and beyond the wedge surface located on the inner side of the arc of the arcuate wedge.
    18. The device according to claims 1-17, t - characterized by the fact that the plastic locking element is secured in the recess by means of a press fit.
    19. A device according to Claims 1-18, characterized in that the plastic locking element has ribs on its outer surface that are located directly at an angle or have a V-shaped or arc shape.
    20. A device according to claims 1 to 19, characterized in that the plastic locking element is fixed in the lateral recess of the pocket of the arcuate wedge.
    21. A device according to Claims 1-20, characterized in that the plastic locking element projects to the side of the side wall of the arcuate wedge, while it, with its side surface, resiliently abuts against the side wall of the tool pocket.
    2 2. The device according to Ttn.1-21, characterized in that the plastic element is installed with a fit in the through-hole of the arcuate 5
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    23. A device according to Claims 1 to 22, characterized in that the recess of the pocket or hole is placed at half the length of the arcuate wedge.
    24. A device according to claims 1 to 23, characterized in that the plast, mass stopper element has a bottom recess.
    25. A device according to claims 1 to 24, characterized in that a fixing segment located along its outer arc is removably attached to the arcuate wedge, on which a fixing gear teeth or elastic fixing fingers interacting with fixing gear teeth on the face surface of the tool are provided.
    26. The device according to Claims 1-25, characterized in that the fixing segment is supported on the shoulder at some distance from the thick end of the arcuate wedge and on the thin end of the arcuate wedge or near it is removably attached to the latter.
    27. The device according to any one of claims 1 to 26, characterized in that the fixing segment by means of a draw pin extending across or
    by means of a pin or the like attached at the thin end of the arcuate wedge G28. The device according to claims 1-27, about t - is characterized by the fact that the fixing segment consists of metal.
    29. The device according to claim 28, characterized in that the fixation of the fingers on the part of the arc leaves the fixation segment and bends outwards from the plane of the arcuate fixation segment.
    30. The device according to claims 1 to 29, characterized in that the arcuate fixing segment between its end located in front of
    20
    1c
    -
    fig.Z
    the thick end of the arcuate wedge, and the place located at half the length of the arcuate wedge, on the outside is smooth-walled.
    31. A device according to claims 1-30, characterized in that on the end-shaped surface of the cutter having a mold, there is provided a locking gear, which cooperates with the locking gear or locking fingers of the locking segments.
    Priority points: 08.02.84 - on nn.l-I6J 06. P.84 - on PP. 17-31.
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    类似技术:
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    同族专利:
    公开号 | 公开日
    CA1234588A|1988-03-29|
    PL147255B1|1989-05-31|
    CS275066B2|1992-01-15|
    GB2153883B|1987-03-11|
    AU567471B2|1987-11-19|
    US4626034A|1986-12-02|
    CS8500666A3|1992-01-15|
    GB2153883A|1985-08-29|
    ES8700722A1|1986-04-01|
    GB8502989D0|1985-03-06|
    FR2559205B1|1988-03-11|
    BE901649A|1985-05-29|
    NL8500122A|1985-09-02|
    DE3440448C2|1992-10-01|
    DE3440448A1|1985-08-08|
    AU3823285A|1985-08-15|
    FR2559205A1|1985-08-09|
    PL251853A1|1985-10-22|
    ES540214A0|1986-04-01|
    引用文献:
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    RU2721981C2|2015-07-31|2020-05-25|Элемент СиксЛимитед|Assembled cutter|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3404295|1984-02-08|
    DE3440448A|DE3440448C2|1984-02-08|1984-11-06|
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