• 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 main frame for a rotary cutterhead of an earth boring machine, has an annular beam (30) by which the cutterhead (20) is mounted onto the earth boring machine for rotation. The frame has a central hub structure (26) disposed forwardly of the annular beam (30); and connected thereto by a plurality of radial spoke beams (28). The spoke beams (28) extend rearwardly and radially outwardly form the hub structure (26) to the annular beam (30) thus making the main frame generally dome shaped. Cutters supported on the spoke beams (28) can be serviced manually from within dome-shaped frame.
    公开号:SU1322988A3
    申请号:SU802995666
    申请日:1980-10-04
    公开日:1987-07-07
    发明作者:Джеймс Роббинс Ричард；Альберт Спенсер Барри
    申请人:Дзе Роббинс Компани (Фирма)；
    IPC主号:
    专利说明:

    SRI WG 1, when the software is in the upper part, a part of the rock falls directly into the bunker 41. When the software is in the lower part, the rock is transferred upwards along the BYtrenny fy perimeter of the WP 1
    权利要求:
    Claims (8)
    [1]
    one
    The invention relates to drilling machines that can be used for tunneling.
    The purpose of the invention is to increase the efficiency of work.
    Figure 1 shows the cutting head and parts of the support of the head of the tunneling machine, side view, with a partial section; figure 2 - head, front view; in FIG. 3, the upper and side portions of the head frame, an isometric front view with a partial cut-out; 4 shows the Essing side of the head frame with a cut-out of the upper part; on fig.Z - the same, rear view; figure 6 is a section aa in figure 2; Fig. 7 is a section B-B in Fig. 6; in Fig. 3, section B-B in Fig. 6; figure 9 - intermediate roller cutter showing one of the ways of its installation, the section; Fig. 10 shows cross sections of HY and DD in Fig. 9; 11 shows an intermediate knife and the corresponding structure for its installation, isometrics.
    The working body of the tunneling machine contains a cutting head 1 mounted on the front of the tunneling machine 2 for rotation about an axis coinciding with the longitudinal axis of the tunnel. The direction of movement of the tunneling machine coincides with the axis of rotation of the head 1 and the driving machine guides the head 1 in the hole formed by it.
    In a preferred embodiment, the head 1 comprises a main frame 3 (FIGS. 3-5), comprising a central bushing 4, from which six separate radial beams 5 extend radially outwards and backwards, intersecting with an annular element in the form of a circular box-like beam 6, s by which the head is mounted on the machine
    2. The central cutting unit 7 is mounted inside the central bushing 4, and the bottom of the bucket walls 70. At the same time, the COE 15 contributes to the grinding of the rock, and also serves as a support for the unbroken large pieces of rock and along the tunnel surface. 7 hp f-ly, 11 ill.
    [2]
    how many individual intermediate knives (cones) 8 and peripheral 9 and their attachment points 10 and 11 (holders), respectively, are located between the respective side plates 12 and 13 of each beam 5. The head 1 also contains several radially elongated passage openings 14 for rock and several cones
    centric, radially separated
    supporting ring elements 15, which are located in front of the main frame
    3. A radially located knife 16 (FIGS. 2, 6 and 7) is mounted between
    [3]
    adjacent elements 15 at the rear edge of each rock hole. With the exception of areas inside the holes 14 and inside each node 10 and 11 of the knife, the front surface
    The main frame 3 (Figures 1 and 2) is covered with sheet sheathing 17, forming a sheet body.
    3-5, the main frame 3 comprises several radial beams 5, which are interconnected between the box-shaped structure of the central sleeve 4 and the annular box-shaped beam 6. The sleeve 4 usually has a hexagonal shape
    and contains six walls 18, oriented so that one needle 5 passes radially outward from each of said walls 18. The shape of sleeve 4 and the corresponding number of rays (beams
    5) depends on the relative radial displacement and the total number of knives 8 and 9, which are necessary for a head of a given size and for a given breed. The rectangular opening 19 passes through the center of the sleeve 4 and decreases in size at the front wall of the sleeve 20 through the window 21. In addition, the circular holes 22 pass through opposite parts of the edges of the hole 4.
    Each radial beam 5 coalesces a pair of side plates 12 and 13 parallel to each other and separated by several partitions or transverse walls 23, which are transversely joined and separated along said side plates 12 and 13. The inner end of each side plate 12 and 13 is firmly rests against the walls of the sleeve 18, so that the adjacent side plates 12 and 13 of the adjacent beams 5 intersect each other at the corners of the walls 18. Each plate 12 and 13 contains the front part 2A and 25, which passes radially outward from the sleeve 4, in while spolagaets in a plane perpendicular to the tunnel axis (fig.Z and A). At their outer ends, each side plate 12 and 13 bends backward to form external face parts 26 and 27 that abut against the front wall 28 of a round box-shaped beam 6 having the shape of a truncated cone. However, the location of said sections 24 and 25 and the outer end sections 26 and 27 correspond to the front of the head 1, which includes a vertical bevel and a reference part. The front faces of the side plates 12 and 13 (Fig. 1) describe the necessary contour of the tunnel surface, which is desirable to cut out in a relatively flat shape with curvature on the outer edges.
    In addition to the front wall 28, the round box-shaped beam 6 (FIGS. 1, 3 and 4) also contains the first wall 29 in the shape of a truncated cone and the second stack 30. The second wall 30 intersects the outer (circumferential) face of the front wall 28. Exterior rear wall 31 The frusto-conical shape extends radially inward from the rear face of the peripheral second wall 30 to intersection with the mounting ring 32, which serves as the lower rear wall. The cylindrical inner wall 33 intersects radially inward the face of the front wall 28 and the front surface 34 of the ring 32.
    The design of the main frame 3 with bending back beams 5 and a round box-shaped beam 6 provides sufficient internal space inside the head 2 so that the worker can enter, mount or remove the knives 7-9.
    The collet 1 is rotated by a large diameter bearing 35 that is mounted on the support 36. Seals 37 and 38 are located between rotating and non-rotating parts at each end of the bearing 35. In addition, the support of the head 36 contains a central axial channel 39 through which the front part of the conveyor 40, including the hopper 41. The latter collects the rock crushed by the deft 1, and pours it onto the conveyor belt 42 to remove the rock back through the machine and the tunnel.
    The central knife - 7 (Fig.2 and 1) is inserted inside the hole 19 of the rear part of the sleeve.
    [4]
    4. The central knife 8 in the proposed device contains four combined circular knives 43. Between each circular knife 43 there is a space up to the window 21 to allow the rock crushed and cut out by these circular knives 43 to pass back through the hole 19.
    One intermediate circular knife 8 and peripheral knife 4 are installed in the respective attachment points 10 and 11. The nodes 10 and 11 are fixedly mounted between the side plates 12 and 13 of the beams so that the cutting edges 44 of the knives 8 and 9 and the central knives 43 cut concentric cuts in the surface of the tunnel when the head 1 rotates. Each circular blade 8, 9, and 43 also contains inclined destructive surfaces 45 bounding said cutting face 44 for grinding the rock in the tunnel.
    Each blade assembly 10 (FIGS. 9-11) contains a box-like structure that is welded between the side plates 12 and 13 and between adjacent partitions 23, forming a compartment 46. There is a gap between each blade 8 and the corresponding compartment 46 to allow the ground material to pass through him back. Each compartment 46 is designed to place the knife 8 in front of the head 1 and hold it in the compartment 46 when using the load transfer units 47. The blocks 47 are located between the rearward-facing surface 48 of each end element 49 and the corresponding forward-facing surface 50 of the channels 51 created in each end wall 52 of the compartment.
    513229886
    46. When blocks 47 of distribution 1 in areas between adjacent radial loads are in place, fixing beams
    [5]
    5. Each hole 14 screws 53 can be inserted through the opening from the central place of the non-turn in blocks 47 and hooked in the vicinity of the sleeve 4 and passes through the threaded holes in the end walls 5 to the outside. kakh 52. Thus, since each box-shaped circumference
    [6]
    6. Each and the end wall 52 forms a single hole 14 has a wall 61, the shaped part of the main frame 3, the supporting arms of the outer segment 62, the interstitial loads on the knives 8 are transmitted in the form of a joint segment 63 and an internal segment through blocks 47 Directly 64, which is located parallel to the main frame 3. A directly adjacent beam from the side plate. In addition, the design of each of the layers is 12. Each hole 14 of the peripheral blade 9 and its node 11 also has an outer rear wall 65 similar to intermediate design which is located parallel to the knife 8 and the node 10. 5 leading wall with its intermediate
    Several additional disk segments 63. The inner end of each roller cone 54 (FIG. 2) is located inside the rear wall 65 diagonally at the head section 1, adjacent to it, is intersected by the corresponding lateral beams 5. In the same way as intermediate plate elements 12 of the beam the knives 8 and the peripheral knives 9, each 20 also forms an internal section — an additional knife 54 sets the rear wall of each hole inside the corresponding node 55, 14. The depth of the wall 61 of the channel and the rear HR contains a box-shaped section of the wall 65 equal to the depth of the plates 56, fixedly mounted in the corresponding 12 and 13 beams. Thus, the guide hole 57 (FIG. 5). The rearward-facing faces of the wall segments, version 57, is partially formed by a pair 61 and 63 and the rearward-facing side of the side walls 58, separated by a parallel segment of the rear wall 65, intersectingly. Each side wall 58 extends with the front wall 28 of the box back to the stop into the round box construction 6, as well as the flat beam, more precisely into the front wall 30 of the steel 12 and 13.
    28, as well as the end sections 26 and 27 of the outer radial end of the caddy plates. In addition, each of the openings 14 (Figures 2 and 3) is open, the hole contains an outer 59 and inside to allow access of the shredded bottom 60 end walls, which are of a kind that can be located in parallel and perpendicular - 35 cutting head 1. The inner radius of the radius line, starting from the values of the end of each hole 14 of the rotational frame of the main frame 3 and is designed inclined inner radially outward through the center of each wall 66, which is located hole 57. perpendicular to intermediate segak and n 8 and 9, an additional 40 to the side of the wall 63 and which the cross-section of the cutters 54 can be removed and replace the inner end of the inner segment in the compartment 56 from the rear side of the ment 64 of the wall 61 and the corresponding main frame 3. Accordingly, between the side plate 12 Beam, with each additional knife 55 and compartment 56, there is a space for 45 the rear part of the opening 14 for passing the crushed rock backwards (Fig. 5) is closed with a cover 67 through the specified space. With the exception of the hole 68, which is formed, each additional roller cutter with an internal segment, leading 54 has a cutting face 44 and sloping walls 64, an inner end wall-surface 45, limiting the cutting 50 with a curved face 69 of cover 67. face 44 to work together Large a portion of the crushed material with disk knives 8, 9 and 43, of the rock cut, which passes back concentric pieces in the wall of the tunnel — through the holes 14, reaches the inner part of the head 1, while
    55, the hole 14 is in the upper part 1 (FIGS. 2 and 3) and contains rotation during rotation. Thus, as much as the radially passing channels material falls directly into the bun, 14 for passing the bent rock, the core 41. Most of the remaining mats across the specified graft of the carved rock reaches
    The innerness of the tin 1, when it is. the matching holes 14 are located in the lower part during rotation and, thus, move 1 upwards along the internal permemeter of the head 1 with a FLOW of the bucket walls 70 (figure 1 n f). These bucket walls VO (figure 1) have a front face 71 and the outer face 72, which abut against the adjacent faces of the respective side beams of the beams. Each bucket wall 70 also contains a back face 73, which abuts the adjacent part of the wall 28 of the round beam 6. Thus, it can be noted that each bucket wall 70 lies in the same plane with the corresponding wall 12 of the side plate of the beam. A protruding edge 74 made of a flexible resilient material is positioned between the innermost part of each wall 70 and the rectangular plate 75 by using fastening screws 76, which pass through the holes in the plate 75 and are screwed into the holes of the internal parts. Edge 74 provides a seal between the wall 70 and the corresponding fixed parts of the machine 2, which partially surround the hopper 41 to prevent the crushed rock from shedding into the wall before it is raised high enough to pour the rock into the bunker 41.
    The entire front and circular surfaces of the main frame 3 (Figures 1 and 2) are coated 17. Only the areas inside the opening of the sleeve 19, the knives 10 and 11, the holes for the passage of rock 14 and the rectangular opening 77 of such a coating - have. Hole 77 provides workers with access through the front side of head 1, for example, in emergency situations. The upper part of the element 15, however, must be removed first. In addition, there are three rectangular holes 78 in the cover 74. The holes 78 (figure 5) are placed around the head 1 and the passage through the head part corresponding to the first peripheral wall 29 and the outer rear wall 30 of the box girder 6. In addition, the plate 79 mounted at the rear face of each hole 78, a passage slightly backward from the rear surface of the outer wall 30 of the beam 6 (Fig. 5). Openings
    fO
    f5
    - 29888
    78 allow the material that is collected from the back side of the head 1 to pass into the head when such material is pushed upward by the wall 80 of the head support 36 facing forward.
    } ia of FIG. 1-3, 7 and 8 several concentric, radially separated supporting ring elements I5 are located on all front and circular sections of the main frame 3, with the exception of the central section, closer to sleeve 4. These ring elements 15 are located at least 1) e radially about 1 part of the head 1, where there are holes 14, including areas where there are also knives 9. It is desirable to place the ring elements 15. in the central part of the main frame 3. However, the placement of the elements 15 i in the central part of the main frame 3 does not give the desired result, unless the holes 14 also pass radially inwards by a sufficient amount. The elongation of the holes 14 in the head 1 is not possible, since there is a large central bushing 4 which is necessary to provide adequate structural support for the center of the head 1,
    thirty
    ABOUT -
    0
    0
    In cross section, each annular element 15 contains an outwardly protruding part in the form of a flange 79, KOTopbui is located tangentially to the shell, which forms the peripheral cutting of the edges of 44 disk knives (cones) 8, 9, 43 and 54, which corresponds to the desired tunnel profile. Each annular element 15 also contains a single inwardly directed tail section in the form of a web 81, which is associated with a corresponding flange 79, forming identical T-shaped sections. Such a design of the annular element 15 with a flange 79, which is wider than the corresponding web 81, provides an increased space in which the rock can expand. Thus, it can be understood that all annular elements 15 do not have the same size in cross section or even the same5 shape, since each individual element 15 has a uniform size in cross section, with the front part of each element 15 wider than its rear (tail) part . Available (internal913
    Ren) part 82 of each web 81 is fixedly attached to the corresponding parts of the beam 5, the front part of the cover 17 and the nodes 10, 11 and 55 of the blades, which directly lie below the specified part of the face 82.
    The annular elements 15 are located outside the front sheet coating 17 at a distance sufficient for the peripheral cutting face 44, which surrounds the annular rim 83 of each circular knife (roller cutter) 8, 9, 43 and 54, protruding slightly ahead of the flanges 79 elements (figure 1). The annular elements 15 are arranged separately so that the circular holes between them are of constant width and that pieces of rock that are too large to pass through the holes 14 can freely slide along the adjacent annular elements 15, while they would only have linear contact with the flanges 79 until such pieces are broken into small pieces with circular knives 8, 43 or 54 knives 16. It is desirable that the space of the medus with adjacent ring elements 15 progressively decreases over the radial distance from the center of the head 1. Such a gap change is necessary to compensate for the fact that due to the force
    Thus, when the head 1 is rotated, particles of material that can only pass through the holes between the adjacent ring 30 elements 15 freely slide between the edges of the flanges 79 until it breaks into smaller sizes that are sufficiently small. small for passage between adjacent
    From this, large pieces of rock material fall more rapidly into the peripheral 35 ring elements 15. In addition, the sections of the head 1 than into its central material, which does not fall between the inter areas.
    With circumferential ring elements 15, it can move along the surface of the flanges 79 as long as it is not replaced by ring elements 15, it can move along the surface of the flanges 79 until it is not narrowly spaced peripherally n the circular knives 36, 43 with annular elements are reduced to or 54. Since the flanges 79 relative to the direction of a certain part of the rock are extremely narrow, they do not create a large central part of the head 1 where such material is collected. The annular elements 15 are separated by a distance sufficient to install two or three peripheral cutting edges 44 adjacent flanges annular
    There is a great friction with the tunnel surface, due to which unrestricted movement occurs between the ground material and the front surface of the flanges 79.
    elements 79, which also limit the size of the crushed particles to -5 °. It is positioned, for example, by means of labor, which can take place between welds, over the entire outer surface of adjacent annular elements 15. each flange 79, forming a crystal pattern. These balls are such that permanently 84 is made of a material that repeats when cut with knives (sh-j is harder than the material from which powders) 8, 9, 43 and 54, and together with the ring elements 15, it must be sufficiently small, whereby the flanges 79 are protected to allow the conveyor 42 to be removed from rubbing with stones when the head is free of such particles. 1 works.
    eight
    10 Ring elements 15 (Loop also as a support for the surface of the tunnel, thus preventing the material from shedding faster than this allows the material to pass through the head 1, or at the rate at which the material is removed by the conveyor 42. Accordingly, each ring element 15 has such a design which makes it round completely, except for the area where the ring element 15 prevents the placement of the circular knife (roller cutter) 8, 9 or 54. So, where possible, the ring element 15 is only about It begins to the extent that it provides a gap and a circular knife 44. In addition, instead of a broken element, in the sections shown in Fig. 2, these elements can have a close fitting hole through which the knife 44 of these circular knives (cones) 8, 9 or 54 can perform.
    Thus, when the head 1 is rotated, particles of material that can only pass through the holes between the adjacent ring elements 15 freely slide between the edges of the flanges 79 until it breaks into smaller sizes that are small enough for pass between adjacent
    ring elements 15. In addition, material that does not fall between
    ring elements 15. In addition, material that does not fall between
    With circumferential ring elements 15, it can move along the surface of the flanges 79 until it is crushed by disc blades 36, 43 or 54. Since the flanges 79 are relatively narrow, they do not create large
     smaller by circular knives 36, 43 or 54. Since the flanges 79 are relatively narrow, they do not create pain
    There is a great friction with the tunnel surface, due to which unrestricted movement occurs between the ground material and the front surface of the flanges 79.
    The lattice of balls 84 (Fig.2-4)
    In FIGS. 2, 6 and 7, several knives 16 are located along the rear face of the front opening of each aperture 14. Knives 16 are mounted on a mounting plate 85, each of which is located along the rear face of the opening 14. In addition, each mounting plate 85 extends outward from the front the cover 17 and bends in the direction of rotation of the head 1, crossing the rear surfaces of the annular elements 15, thereby forming a stop or barrier for the rock that can slide along the opening between the adjacent annular elements 15 and go to the opening 14 s (7 and 8). Each knife 16 is fixed between adjacent flanges 79 of the annular elements and protrudes behind them, but behind the peripheral cutting edges 44.
    In addition, each knife 16 has a shoulder 86, which overlaps the corresponding leading surface of the mons machine 2, circular knives (cutters 8, 9, 43 and 54 cut concentric cuts in the wall of the tunnel so that the inclined surfaces 45 with cutting
    5 facets 44 could grind the rock located between the cuts. The grinder of the rock material is then passed back through the head 1 between the ring members 15 and in the hole 14.
    A material that is too large to pass between adjacent annular elements 15 can pass along a hole about 5 formed by adjacent annular elements 15 until it reaches the knife 16. This knife 16 crushes the material in such a way that; if he could pass between the adjacent elements of the kol20 15. In addition,
    these annular elements 15 serve as a support for large pieces of rock material so that they do not fall off the roof of the tunnel to
    tazhnoy plate 85, and the tip or, as long as the blade 87, which protrudes outside, is crushed with disk knives 8, 9, 43
    and overlaps part of the leading edge 88
    each mounting plate 85 (Fig.6 9). Each knife 16 is removable.
    on mounting plate 85 with -30
    screws 89 that pass through the holes in the mounting plate 85 and
    screwed into the threaded holes
    in the collar 86 of each knife 16, due to
    which, if necessary, the knives can be 35 1 then on the conveyor 42 so that
    to change. However, since the blade is being taken out of the tunnel.
    87 is made of solid material formula of the invention
    and much thicker than for example
    the peripheral cutting edges 44 of the disk-boring working body of the passage-through knives 8, it turns out that the knives of the 40 machine containing the fixed-16 are rarely replaced. In addition, the but-main frame with the possibility of the mi 16 can be removed when, for example, the cutting head body
    and 54 and knives 16. When the rock reaches the inside of the head 1, the pieces of rock either fall directly into the hopper 41 or rise up along the inner perimeter of the head 1 with walls 70 until the material rises high enough to slide down into the hopper
    which is fixed to the center of the typny side of the body of the cutting head
    measures, individual rock characteristics do not require their use.
    The head 1 (Fig. 2) also contains several forward-facing nozzles 90, located adjacent to the oppositely directed beams 5, for spraying water to the tunnel surface in order to reduce clogging during operation of the head 1. The nozzles 90 are connected to each other using hoses 91 , which are covered to protect the area 92. You can use other types of pipes and highways instead of hoses 91.
    During operation, when the head 1 rotates and at the same time advances with the machine 2, the circular knives (cones) 8, 9, 43 and 54 cut concentric cuts in the tunnel wall so that the inclined surfaces 45 with the cutting
    faces 44 could grind the rock between the cuts. The crushed rock material is then passed back through the head 1 between the annular elements 15 and into the holes 14.
    A material that is too large to pass between adjacent annular elements 15 can pass along a hole formed by adjacent annular elements 15 until it reaches the knife 16. This knife 16 crushes the material so that; he could pass between adjacent ring elements 15. In addition,
    these annular elements 15 serve as a support for large pieces of rock material so that they do not fall off the roof of the tunnel to
    reduced by circular knives 8, 9, 43
    and 54 and knives 16. When the rock reaches the inside of the head 1, the pieces of rock either fall directly into the hopper 41 or rise up along the inner perimeter of the head 1 with walls 70 until the material rises high enough to slide down into the hopper
    40 chesky of the car, containing fixed - "to the main frame with a possibility of vrashen the case of the cutting head, on
    which is fixed to the center of the typny side of the body of the cutting head
     holders with cones, each of which has a peripheral cutting face protruding relative to the beam and the body and radially concentric ring Q of the supporting elements, rock bore holes located between the cones, which is different in that head body
     it is made hollow inside, each ring element is made with a single tail part rigidly attached to the top of the body, and an end part, the width of which is in cross section
    P
    greater than the width of the hvgtpvoy h-ir / m, while in the case p top; en1L. -I l- ;: pi. RL Diazom -K R, h frontal OTERRGTY, SPEED. ACC. WITH PROHOL
    rock holes, iiLpi; - on the side of the main GL - L1 phirio iHeHa with front openings:, one-way holes: with the rear walls connected with,}) p (.1;: gap holes for pores;); ; s and skins located npph h e1. the walls of each of the niioyoAHf.ix openings for the breed.
    2, the distribution authority for ". , g., due to the fact that 1row.od1-: there are holes for the rock ry; mrp ;; т1 .; in radial direction and through the CR-cut central and peripheral parts of the cutting head.
    7
    3. Working body according to claim 1, characterized in that the annular support elements are located in the same area as the passage openings for the rock.
    4. The working body according to the paragraph 3 of the report, which has the fact that the pier passage openings for the urrpi breed are located from the center to the city of Orif.
    5. Worker ln according to i. 1, that is, by the fact that) - lzhdl pz
    OS
    Tl
    ffff
    / J


    27Ч3814
    .tt: -ii:;: t falls in ;; Earl relative to pi; -ts: D -.1 :; Pstey ring support me: -: t: i; ptad relatively-. d-: brz zo: other peripheral- N; I: grli h-i I j ipo:; ; to
    f. the body of p. 3, of tl and - h :: y;: i and,: so that each of h, zhe -: l} .lo- “en radially between the composer ,,.:. supporting elements.
    7.P, -; o 1chp 1 organ of p. 6, o tl isch; o to and u with the fact that the knives are equipped with n-: oskiml fastening means,;: L (T1. -1 on the rear wall of the Xyyy-: rock hole, protruding r.Ti jujiMH relative to the hull and moving the shank on the underside of the end parts of the ring of the ring elements, iipn these knives on flat tools kg of heat. .
    [7]
    8. Workers; authority under item 7, о T L и-; a K) u and with the fact that the internal Uterifer; shgh; parts of the working body of the wall are made of bucket walls, which are / 7) perpendicular to the circumference of the body and radially from iiO. -M T- .-. about its axis of rotation,
    [8]
    The walls of KfiBuionne are located forwards inside and back up to the stop in t iipriyc.
    five
    20
    25
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    55
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    29,
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    79
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    65
    Fig 5
    86 6 A /
    k6-6 dda
     "/ -.L /, UiJ vtJ on
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    65
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    5-6 15
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    Fi2.P
    Editor E. Papp
    Compiled by V.Ponomareva
    Tehred M. Morgental Proofreader N. Korol
    2883/59
    Circulation 454Subscribe
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Production and printing company, Uzhgorod, Projecto st., 4
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US9179A|1852-08-10|Henry w |
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US06/009,170|US4234235A|1979-02-05|1979-02-05|Rotary cutterhead for an earth boring machine|
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