CA1207157A - Device for coupling a shaft furnace tap hole drilling rod to the working tool of a drilling machine - Google Patents
Device for coupling a shaft furnace tap hole drilling rod to the working tool of a drilling machineInfo
- Publication number
- CA1207157A CA1207157A CA000420863A CA420863A CA1207157A CA 1207157 A CA1207157 A CA 1207157A CA 000420863 A CA000420863 A CA 000420863A CA 420863 A CA420863 A CA 420863A CA 1207157 A CA1207157 A CA 1207157A
- Authority
- CA
- Canada
- Prior art keywords
- jaw
- coupling device
- rod
- axis
- taphole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
- F27D3/1509—Tapping equipment
- F27D3/1527—Taphole forming equipment, e.g. boring machines, piercing tools
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/12—Opening or sealing the tap holes
Abstract
Abstract of the Disclosure :
The present invention presents a coupling device for coupling a shaft furnace taphole drilling rod to a drilling machine. The coupling device includes piston operated jaws (22)(24) movable into and out of engagement with a drilling rod (14). The operating pistons (36)(38) for the jaws (22) (24) are housed in a block or housing, and the jaws are located in another block or housing in which the end of the drilling rod (14) to be engaged is also located.
The present invention presents a coupling device for coupling a shaft furnace taphole drilling rod to a drilling machine. The coupling device includes piston operated jaws (22)(24) movable into and out of engagement with a drilling rod (14). The operating pistons (36)(38) for the jaws (22) (24) are housed in a block or housing, and the jaws are located in another block or housing in which the end of the drilling rod (14) to be engaged is also located.
Description
7~57 This invention relates to the field of coupliny means for connections to a rod. More particularly, this invention relates a coupling device for coupling a taphole drilling or forming rod, as employed in furnace equipment, such as a shaft furnace, to a percussion machine employed for extraction of the rod from the taphole.
A recent development in the tapping of molten metal furnaces involves process and apparatus in which a rod is left in the taphole between two successive tapping operations. To open the taphole, the rod is extracted; and when the taphole is to be closedr a rod is reinserted into the plugging mud in the taphole rod. The rod is extracted from the tap~ole by being coupled or connected to a percussion machine which is operated to extract the rod.
1~ The process and apparatus for opening the taphole by means of a drill rod left in the taphole between two successive tappings is arousing increasing in~eres~ in comparison with the conventional method in which tapholes are drilled by means of a drill bit. Reference is hereby made to Belgian Patent Number 890,951, for a discussion of details of this taphole processing and its advantages and also for a discussion of equipment to be used in the process. As discussed in Belgian Patent 890,951, this taphole opening method requires that the drill rod embedded in the taphole be coupled to an appropriate machine, such as a percussive type drilling machine, to extract the rod from the taphole when it is desired to open the taphole.
;7 Various systems and apparatus have been proposed for effecting the required coupling between the taphole rod and the drilling machine. Most of these prior apparatus and methods, however, require manual action on the part of the operator in making the connection. This, of course, involves a risk to the safety of the operator in view of the danger of accidents arising out of the position in which this manual action has to be taken. To overcome these drawbacks, a coupling device has been proposed which is capable of being automatically and remotely operated from a control station to eliminate the requirement for manual intervention by the operator. However, that proposed system and apparatus still su~fers from two significant drawbacks. First, the apparatus of that prior system requires a specially designed taphole rod provided with a notch at the end to be engaged by the coupling device. The second drawback is that the requirement for specially designed and formed taphole rod increases the cost of the rods. The second drawback is all the more serious, since the drilling rod is usually used only once and is not capable oE being reused aftex it has been extracted from the taphole. Thus, any increased expense related to the taphole rod is multiplied each time a rod is consumed.
The purpose of the present invention is to eliminate the above discussed and other problems and disadvantages of the prior art.In accordance with the present invention, there lS provided a coupling device including first housing means having a chamber therein for receiving a rod to be coupled;
~L%0~57 jaw means in said chamber, said jaw means being movabl~
between a first position of disengagment from the rod and a second position of engagement with and penetration into the rod;
said jaw means being of a material harder than the materiel of the rod;
second housing means; and pEessurized fluid actuating means in said second housing means and connected to said jaw means for moving said jaw means 10 between said first and second positions.
There is also provided a coupling devlce for coupling a working tool to a taphola rod of a molten metal vessel, the coupling devi.ce including :
first housing means having a chamber therein for receiving the taphole rod to be coupled;
entrance means at the front of said first housing means for passage of said taphole rod into said chamber;
said chamber ha~ing first and second spaced outer walls symmetric about an axis of the coupling device, said first and second walls being inclined inwardly toward said axis and said entrance means;
jaw means in said chamber and adapted to move along said first and second spaced outer walls between a first position o~ disengagement with the taphole rod and a second position of engagement with and penetration into said taphole rod;
second housing means connected to said first housing means and adapted to be connected to the working tool; and pressurized fluid actuating means in said second housing means and .~ ~IL2~7~5~7 connected to said jaw means for moving said jaw means along said first and second walls of said chamber between said first and second positions, said actuating means being aligned with the direction of motion oE said jaw means.
The coupling device of the presen-t invention achieves the desired coupling between the drilling tool and the taphole rod in an effective and reliable manner and without requiring any special design of the taphole rod, thus eliminating the substantial disadvantage of additional cost requires for 10 specially desiyned taphole rods.In describing and discussing the present invention, reference will be made to a "taphole rod" or a "drilling rod", and it will be understood that those terms are used interchangeabl~. The term"drilling rod"
is conventional from the prior technology in which the 15 tapholes were actually drilled. In the technology in which the present invention is employed, the "drilling rod"
terminology is still used, even though no drilling takes place in the conventional sense;and hence the term "taphole rod" maybe more appropriate.
The coupling device of the present invention has at least two movable jaws arranged summetrically around the axis of a chamber which receives the taphole rod. The jaws are made of a materiaL harder than the material of the taphole rod, and the jaws are displacable under the action of pneumatically `~ operated piston means between a first, or retracted, position of the jaws in which the distance between the jaws is greater ~han the diameter of the taphole rod, and a second, or advanced, position of the jaws in which the distance between the jaws is smaller than the diameter of the taphole rod.
, :~207~57 In the second position, the jaws bite into and lock onto the rod, whereby the rod may be extracted from the taphole, pre-ferably by the action of a percussive drill tool to which the coupling is also connected. The coupling includes a first block or housing in which the jaws are located and into which the taphole rod extends, and a second block or housing in which the pneumatic pistons are located. The second block or housing also contains structure for connection to the percussive drill tool.
In a first embodiment of the invention, the pistons and their cylinders are inclined inwardly wïth respec-t to the central axi~ of the coupling device, so that the piston rods converge toward the opening in the first housing through which the taphole rod passes. The jaws are connected directly to, but not necessarily rigidly on, the ends of the piston rods.
The walls of the chamber in the first housing into which the taphole rod extends are preferably oblique and inclined at the same angle as the piston rods r SO that they serve to support and guide the jaws.
The jaws may consist of locks attached to the piston rods, with transverse gripping edges on the blocks which engage and bite into the taphole rod. The jaws may also consist of roller elements sapable of rolling or turning on the end of the piston rod. In another embodiment, the jaws consist of locking or cam elements which are pivotal into engagement with the taphole rod by the action of connecting rods extending from the pistons. In this second embodiment, the pistons and piston rods may be aligned parallel to the axis ~ 7RS7 of the str~lcture, rather than being inclined as in the o-ther embodiment.
In bo-th embodiments the jaws are actuated through pneumatically operated pistons which are preferably connected -to the same source of compressed air used to operate the percussion drilling tool. Compressed air operates the pistons to effect locking engagement; and return action to disengage the jaws may be effected by return springs and/or compressed air to the other side of the piston.
The above discussed and other advantages of the present invention will be apparent to and unders-tood by those skilled in the art from the followin~ detailed description and drawings.
Referring now to the several FIGURES in the drawings, wherein like elements are numbered alike in the several FIGURE~:
FIGURE 1 is a sectional longitudinal or elevation view through a first embodiment o~ the coupling device of the present invention, wi-th the jaws shown in one position.
FIGURE 2 is a view similar to FIGURE 1 showing the jaws in a second position.
FIGURE 3 is a view similar to FIGURES 1 and 2 showing the jaws and taphole rod in another position.
FIGURE 4 is a rear elevation view, partly in section,
A recent development in the tapping of molten metal furnaces involves process and apparatus in which a rod is left in the taphole between two successive tapping operations. To open the taphole, the rod is extracted; and when the taphole is to be closedr a rod is reinserted into the plugging mud in the taphole rod. The rod is extracted from the tap~ole by being coupled or connected to a percussion machine which is operated to extract the rod.
1~ The process and apparatus for opening the taphole by means of a drill rod left in the taphole between two successive tappings is arousing increasing in~eres~ in comparison with the conventional method in which tapholes are drilled by means of a drill bit. Reference is hereby made to Belgian Patent Number 890,951, for a discussion of details of this taphole processing and its advantages and also for a discussion of equipment to be used in the process. As discussed in Belgian Patent 890,951, this taphole opening method requires that the drill rod embedded in the taphole be coupled to an appropriate machine, such as a percussive type drilling machine, to extract the rod from the taphole when it is desired to open the taphole.
;7 Various systems and apparatus have been proposed for effecting the required coupling between the taphole rod and the drilling machine. Most of these prior apparatus and methods, however, require manual action on the part of the operator in making the connection. This, of course, involves a risk to the safety of the operator in view of the danger of accidents arising out of the position in which this manual action has to be taken. To overcome these drawbacks, a coupling device has been proposed which is capable of being automatically and remotely operated from a control station to eliminate the requirement for manual intervention by the operator. However, that proposed system and apparatus still su~fers from two significant drawbacks. First, the apparatus of that prior system requires a specially designed taphole rod provided with a notch at the end to be engaged by the coupling device. The second drawback is that the requirement for specially designed and formed taphole rod increases the cost of the rods. The second drawback is all the more serious, since the drilling rod is usually used only once and is not capable oE being reused aftex it has been extracted from the taphole. Thus, any increased expense related to the taphole rod is multiplied each time a rod is consumed.
The purpose of the present invention is to eliminate the above discussed and other problems and disadvantages of the prior art.In accordance with the present invention, there lS provided a coupling device including first housing means having a chamber therein for receiving a rod to be coupled;
~L%0~57 jaw means in said chamber, said jaw means being movabl~
between a first position of disengagment from the rod and a second position of engagement with and penetration into the rod;
said jaw means being of a material harder than the materiel of the rod;
second housing means; and pEessurized fluid actuating means in said second housing means and connected to said jaw means for moving said jaw means 10 between said first and second positions.
There is also provided a coupling devlce for coupling a working tool to a taphola rod of a molten metal vessel, the coupling devi.ce including :
first housing means having a chamber therein for receiving the taphole rod to be coupled;
entrance means at the front of said first housing means for passage of said taphole rod into said chamber;
said chamber ha~ing first and second spaced outer walls symmetric about an axis of the coupling device, said first and second walls being inclined inwardly toward said axis and said entrance means;
jaw means in said chamber and adapted to move along said first and second spaced outer walls between a first position o~ disengagement with the taphole rod and a second position of engagement with and penetration into said taphole rod;
second housing means connected to said first housing means and adapted to be connected to the working tool; and pressurized fluid actuating means in said second housing means and .~ ~IL2~7~5~7 connected to said jaw means for moving said jaw means along said first and second walls of said chamber between said first and second positions, said actuating means being aligned with the direction of motion oE said jaw means.
The coupling device of the presen-t invention achieves the desired coupling between the drilling tool and the taphole rod in an effective and reliable manner and without requiring any special design of the taphole rod, thus eliminating the substantial disadvantage of additional cost requires for 10 specially desiyned taphole rods.In describing and discussing the present invention, reference will be made to a "taphole rod" or a "drilling rod", and it will be understood that those terms are used interchangeabl~. The term"drilling rod"
is conventional from the prior technology in which the 15 tapholes were actually drilled. In the technology in which the present invention is employed, the "drilling rod"
terminology is still used, even though no drilling takes place in the conventional sense;and hence the term "taphole rod" maybe more appropriate.
The coupling device of the present invention has at least two movable jaws arranged summetrically around the axis of a chamber which receives the taphole rod. The jaws are made of a materiaL harder than the material of the taphole rod, and the jaws are displacable under the action of pneumatically `~ operated piston means between a first, or retracted, position of the jaws in which the distance between the jaws is greater ~han the diameter of the taphole rod, and a second, or advanced, position of the jaws in which the distance between the jaws is smaller than the diameter of the taphole rod.
, :~207~57 In the second position, the jaws bite into and lock onto the rod, whereby the rod may be extracted from the taphole, pre-ferably by the action of a percussive drill tool to which the coupling is also connected. The coupling includes a first block or housing in which the jaws are located and into which the taphole rod extends, and a second block or housing in which the pneumatic pistons are located. The second block or housing also contains structure for connection to the percussive drill tool.
In a first embodiment of the invention, the pistons and their cylinders are inclined inwardly wïth respec-t to the central axi~ of the coupling device, so that the piston rods converge toward the opening in the first housing through which the taphole rod passes. The jaws are connected directly to, but not necessarily rigidly on, the ends of the piston rods.
The walls of the chamber in the first housing into which the taphole rod extends are preferably oblique and inclined at the same angle as the piston rods r SO that they serve to support and guide the jaws.
The jaws may consist of locks attached to the piston rods, with transverse gripping edges on the blocks which engage and bite into the taphole rod. The jaws may also consist of roller elements sapable of rolling or turning on the end of the piston rod. In another embodiment, the jaws consist of locking or cam elements which are pivotal into engagement with the taphole rod by the action of connecting rods extending from the pistons. In this second embodiment, the pistons and piston rods may be aligned parallel to the axis ~ 7RS7 of the str~lcture, rather than being inclined as in the o-ther embodiment.
In bo-th embodiments the jaws are actuated through pneumatically operated pistons which are preferably connected -to the same source of compressed air used to operate the percussion drilling tool. Compressed air operates the pistons to effect locking engagement; and return action to disengage the jaws may be effected by return springs and/or compressed air to the other side of the piston.
The above discussed and other advantages of the present invention will be apparent to and unders-tood by those skilled in the art from the followin~ detailed description and drawings.
Referring now to the several FIGURES in the drawings, wherein like elements are numbered alike in the several FIGURE~:
FIGURE 1 is a sectional longitudinal or elevation view through a first embodiment o~ the coupling device of the present invention, wi-th the jaws shown in one position.
FIGURE 2 is a view similar to FIGURE 1 showing the jaws in a second position.
FIGURE 3 is a view similar to FIGURES 1 and 2 showing the jaws and taphole rod in another position.
FIGURE 4 is a rear elevation view, partly in section,
2~ showing the structure in FIGURES 1, 2 and 3.
FIGURE 5 is a partial sectional view showing a first jaw structure.
FIGU~E 6 is a partial sectional view similar to ~IGURE 5 showing a second jaw structure.
q FIG~RE 7 is a partial sectional view similar to FIGURES 5 and 6 showing a third jaw struc-ture.
FIGURE 8 is a view showing appara-tus similar to -that of FIGURES 1~ 2 and 3 with another embodiment of the jaw structure.
FIGURE 9 is a sectional elevation view showing a second embddiment of the coupling device of the present invention.
Referring jointly to FIGURES 1, 2 and 3, the coupling device of the present invention has a block or housing 10 in which the pistons and cylinde~s are located and another block or housing 12 having an internal compartment 20 in which the taphole rod and jaws are located. Housing 12 receives a taphole or drill rod 14 i~ through an aperture or axial opening 16. Opening 16 is circular in cross section with its center o~ the axis "O"
of the coupling mechanism; and the a~is o rod 14 is also coaxial with axis "O" when the rod is engaged in the coupling device. To assist in location and entry of taphole rod 1~ into the coupling mechanism throu5h opening 16, the front end of housing 12 has a concave or funnel shaped recess 18 to provide a lead in passage for the taphole rod 1~ .
The interior of block or housing 12 contains chamber ~; 20 which, as can be seen in FIGURE 4, has straight vertical side walls. When taphole rod 14 has been completely inserted into the coupling mechanism, compartment 20, as best seen in ~ 7 ~2~
_9_.~
FIGURE 1, -then consists of two cavities, one each positioned above and below the rod 14. Jaws 22 and 24, which are designed to grip rod 14, are positioned in these two cavities. The jaws 22 and 24 are designed and shaped so as to move within these cavities for grippiny engagement with rod 14. ~he two outer walls 26 and 28 of chamber 20 converge toward axis "0" in the direction of opening 16; and these ou~er walls, together with the side walls of the upper and lower portions of chamber 20 guide and support the jaws 22 and 24 which are si~ed to be in sliding contact engagement with the walls of these chambers. Jaws 22 and 24 are provided, respectively, with inner gripping edges 22a and 24a for locking engagement with the rod 14.
Housing 10 is configured to be integrally attached to an appropriate working tool, not shown, such as e percussion type taphole drilling machine. In the embodiment shown, this connection may be effected by wa~ of a central passageway 30, coaxial with axis "0", for mounting the coupling device on the woxking tool. The mounting of the coupling device on the working tool may be accomplished by known means, such as a key type or bayonet type securing device, or by the apparatus disclosed in Belgian Patent 890951.
Block or housing 10 has a pair of cylinders 32 and 34 in which a pair of pistons 36 and 38 and their piston rods 44 and 46 are mounted for sliding movement. Piston rods 44 and 46 are connected, respectively, to jaws 22 and 24. "0" rings or other known seals 40 and 42 provide fluid tight sealing of the pistons in their respective chambers so that the pistons 2~57 may be activated by pneumatic or other pressurized fluid.
The left side of each piston is connected to a source of compressed air (not shown) by appropriate pipes or conduits (also not shown).
Compressed air to operate the cylinders may be obtained from the pneumatic circuit of the percussion tool to which the coupling device is connected. The application of pressurized fluid to the left of each of the pistons 36 and 38 causes the pistons to move to the right from the position shown in FIGURE 1 to the positions shown in FIGURES 2 and 3, successively. Helical return springs 48 and ~0 are posi~ioned around the piston rods 44 and 46 to drive the pistons 36 and 38 back to the left from the FIG~RE 3 position to the FIGURE 1 position when the pressurized air is removed from the left side of the pistons.
In the embodiment shown in FIGURES 1 through 3, it is essential that the pistons and piston rods be positioned obliquely, i.e., inclined, with respect to the axis"0" and in line with the direction of movement of jaws 22 and 24 relative to axis "0" parallel to the walls 26 and 28 of chamber 20.
Still referring to FIGURES 1 through 3,the operation of the coupling device will be described. ~ssuming that the drilling rod or taphole rod is in place with the taphole closed and it is desired to extract the rod from the furnace, the percussion machine must be connected to the taphole rod 14 to extract the rod This is effected by means of the couplirlg d~vice o~ the present invention.
21D7~57 The coupling device (which is a-ttached to the percussion tool~ is first positioned on rod 1~, with rod 14 passing through opening 16 to the point where the back wall oE
chamber 20 is brought into abutting contact with the end of rod 14. In this position, and with the pistons and jaws 22 and 24 being in the unactivated (i.e., FIGUREl) state, the jaws 22 and 24 are not in contact with rod 14. Pneumatic pressure is then introduced into the left side of pistons 36 and 38 to drive the pistons to the right while compressing springs ~8 and 50. Jaws 22 and 24 move along walls 26 and 28 to the intermediate position shown in FIGURE 2 where the gripping surfaces 22a and 24a of the jaws come into gripping contact and engagement with rod 14. From that point on (i.e., from the intermediate position shown in FIGURE 2) traction can then be exerted on rod 14 by moving the coupling device to the left as viewed in the drawings. This displacement of the coupling member is, in ~act, carried out by the operation of the percussion tool while pistons 36 and 38 remain pressurizad. Under the simultaneous action of the pneuma-tic pressure on pistons 36 and 38 and the action of the percussion tool associated with the traction or tension exerted by the jaws 22 and 24 on rod 14, the jaws are caused to move ~rom ~he position shown in FIGU~E 2 to the position shown in FIGURE 3, while at the same time the jaws are driven into biting engagement with the outer layer of the rod 14.
That is, the surfaces 22a and 24 a of the jaws actually bite or penetrate into the outer surface of rod 14 for a slight distance because of the obli~ue sliding movement of the jaws.
'-:
~20~ 7 An automatic and self-clamping ac-tion takes place in which the gripping action between the jaws and taphole rod increase in proportion to the tractive force exerted on the rod. This automatic clamping not only insures extremely reliable operation, but also prevents the rod 14 from inadvertently slipping out of the coupling device. It is to be noted that for the device to function properly, the two jaws 22 and 24 must be made out of material harder than that of rod 14, so that the biting effect described and illustrated with respect to FIGURE 3 will occur.
Wi-th the coupling to the taphole or drilling rod having been made as described in connection with FIGURES 1 r 2 and 3, the taphole may then be opened by removal of the rod from the taphole by further operation of the percussion device.
As indicated previously, it is necessary to replace the taphole rod after it has been extracted from the taphole.
Thus, the taphole rod must be disengaged from the coupling device. To effect this disengagement, the left side of pistons 36 and 38 are ven-ted to atmosphere (i.e., the pressurized fluid is removed), whereby the compressed springs 48 and 50 return the pistons, piston rods and jaws from the position of FIGURE 3 to the position of FIGURF 1. If the force of springs 48 and 50 should, for sorne reason, be insufficient to return the pistons, rods and jaws, rod 14 can be manually pushed to the left to disengage the jaws , or the percussion tool can be actuated to the right, so that its vibrations will release rod 14.
Housings lO and 12 are separable from each other in order to afford access to chamber 20 for purposes such as changing the jaws when they are worn. To this end, the housings 10 and 12 are connected together by bolts 52 (see FIGURE 4~; and these housings may be separated whenever it is desired to replace the jaws.
The inner or gripping edges 22a an 24 a of jaws 22 and 24 must be sufficiently sharp to enable them to bite into drilling rod 14, as shown in FIGURE 3. In the simplest con-figuration, edges 22a and 24a will be straight edges formed by the junction of inclined surfaces on the jaws. ~hat simplest configuration is shown in FIGURES 4 and 7, with FIGUR~ 7 depicting the jaw having penetrated into the surface of rod 14. It is, nevertheless, preferable for the edges 22a and 24a to be shaped to provide wider contact with the drilling rod than is effected in the FIGURE
4 and 7 configuration. FIGURES 5 and 6 show two variations of the edge arrangement to achieve that wider contact.
In FIGURE 5 the edges 22a and 24a have a concave shape which is essentially complimentary to the shape of the outer surface of rod 14. In the FIGURE 6 embodiment, the edges 22a ~nd 24a are each made in two convex portions (i.e., having convex portions arching from the center of the jaw to each edge). With the configuration of FIGURE 6, contact between the jaws and the rod in the position corresponding to the FIGURE 2 position is obtained at two points on two sides of a vertical axis of symmetry of the rod and jaws, thus enhancing both the gripping of the rod and the self centering action of the jaws.
Referring now to FIGURE 8, a variation of the coupling device of the present invention is shown.
::, ~L~Q7~7 In the FIGURE ~ construction, the jaws 22 and 24 aLe replaced by rollers 54 and 56 rotatably mounted on the ends of rods 44 and 46. The ends of rods 44 and 46 are bifurcated in order to receive and mount -the xollers 54 and 56 on the rods. The presence of the rollers 5~ and 56 in place of jaws 22 and 24 results in greater fle~ibility in the choice of the angle of inclination for the walls 26 and 28. In all other respects, the coupling device of FIGURE 8 is the same as that described with respect to FIGURES 1, 2 and 3, both in construction and function.
Referring now to FIGURE 9, still another embodiment of the present invention is shown. In the FIGURE 9 embodiment, the jaws consist of a pair of pivoting jaw or cam elements 66 and 68 which are mounted on pivots 70 and 72 in a chamber 64 in a block or housing 60. Another block or housing element 62 (which, as in the preceding embodiments, is affixed to the drilling machine) has a pair of cylinders 74 and 76 with pistons 78 and 80. Pistons 78 and 80 are actuated by pneumatic pressurized fluid from ~0 the left toward the right as seen in FIGURE 9 to pivot th~ jaws or cams 66 and 68 into locking engagement with rod 14. The piston rods 86 and 88 pass into compartment 60 and are articulated via connecting rods 90 and 92 to the corresponding pivoting jaws 66 and 68, respectively. The sliding movement of the pistons 78 and 80 causes the jaws 66 and 68 to pivot counterclockwise and cloc~wise, respectively, around their fulcrums 70 and 72 to effect locking engagement with and coupling to the taphole rod ~0~ 7 when pressurized fluid is introduced to the left of pistons 7~ and 80. Jaw 66 will be pivoted counterclockwise and j~w 68 will be pivoted clockwise to bring the jaws into contact with the outer surface of rod 14; and the simultaneous action of the pistons and the traction on rod : 14 will move the jaws 66 and 68 into the position shown in FIGURE 9 where the jaws bite into the rod 14. This is the position corresponding to that shown in FIGURE 3, which occurs when the drilling rod 14 is retracted from the taphole. When the left side of pistons 78 and 80 are vented to ambient, the springs 82 and 84 will drive the pistons to the left, whereby jaws or cams 66 and 68 will be pivoted in the reverse directions to disengage the jaws from rod 14, this being the position corresponding to that shown in FIGURE 1.
It will be noted that in the FIGURE 9 embodiment the pistons and piston rods may be positioned parallel to axis "0" rather than being inclined with respect to the axis. It is also to be noted that in the embodiment of FIGURE 9 the drilling rod 14 also undergoes a self-clamping action as in the previously described embodiments. That is, the greater the tractive force exerted on rod 14, the greater will be the distance to which the jaws 66 and 68 penetrate the peripheral surface of rod 14, so that there is no risk that rod 14 will slide between the jaws 66 and 6B during retraction.
The disengagement of rod 14 from the coupling device of the FIGURE 9 embodiment following extraction of the rod ,r from the taphole is effected in the same manner as in the embodimen-ts discussed previously.
In order to prevent the jaws 66 and 68 from pivoting into a position perpendicular to the axis of rod 14, which would make it extremely difficult to release the rod 14 from the coupling device, the front or right walls of chamber 64 can be constructed at a moderate angle of inclination so that the extreme position of jaws 66 and 68 on engagement with rod 14 may he approximately the position corresponding so that shown in FIGURE 9.
It is also to be noted that the jaws of the FIGURE 9 embodiment may be of different shapes, such as described with regard to FIGUR~S 5 through 7 ; and the jaws of all embodiments may be of additional alternative shapes and each may be provided with two or more transverse engaging edges.
As will be recogni~ed and understood, the coupling apparatus of the present invention is novel in its structure and operation; and it has the special advantage over the prior art in that it does not require any modification of the end of rod 14 which is to be engaged by the coupling device.
That is, the end o rod 14 to be engaged by -the coupling device may be cylindrical and smooth and does not have to be provided with special slots or grooves for engagement with 2~ the coupling device. Thus, the rod 14 may be economically produced. A further advantage is that the rods may be out of round and vary in diameter by up to 15 millimeters, and the device of the present invention will still function effectively~
FIGURE 5 is a partial sectional view showing a first jaw structure.
FIGU~E 6 is a partial sectional view similar to ~IGURE 5 showing a second jaw structure.
q FIG~RE 7 is a partial sectional view similar to FIGURES 5 and 6 showing a third jaw struc-ture.
FIGURE 8 is a view showing appara-tus similar to -that of FIGURES 1~ 2 and 3 with another embodiment of the jaw structure.
FIGURE 9 is a sectional elevation view showing a second embddiment of the coupling device of the present invention.
Referring jointly to FIGURES 1, 2 and 3, the coupling device of the present invention has a block or housing 10 in which the pistons and cylinde~s are located and another block or housing 12 having an internal compartment 20 in which the taphole rod and jaws are located. Housing 12 receives a taphole or drill rod 14 i~ through an aperture or axial opening 16. Opening 16 is circular in cross section with its center o~ the axis "O"
of the coupling mechanism; and the a~is o rod 14 is also coaxial with axis "O" when the rod is engaged in the coupling device. To assist in location and entry of taphole rod 1~ into the coupling mechanism throu5h opening 16, the front end of housing 12 has a concave or funnel shaped recess 18 to provide a lead in passage for the taphole rod 1~ .
The interior of block or housing 12 contains chamber ~; 20 which, as can be seen in FIGURE 4, has straight vertical side walls. When taphole rod 14 has been completely inserted into the coupling mechanism, compartment 20, as best seen in ~ 7 ~2~
_9_.~
FIGURE 1, -then consists of two cavities, one each positioned above and below the rod 14. Jaws 22 and 24, which are designed to grip rod 14, are positioned in these two cavities. The jaws 22 and 24 are designed and shaped so as to move within these cavities for grippiny engagement with rod 14. ~he two outer walls 26 and 28 of chamber 20 converge toward axis "0" in the direction of opening 16; and these ou~er walls, together with the side walls of the upper and lower portions of chamber 20 guide and support the jaws 22 and 24 which are si~ed to be in sliding contact engagement with the walls of these chambers. Jaws 22 and 24 are provided, respectively, with inner gripping edges 22a and 24a for locking engagement with the rod 14.
Housing 10 is configured to be integrally attached to an appropriate working tool, not shown, such as e percussion type taphole drilling machine. In the embodiment shown, this connection may be effected by wa~ of a central passageway 30, coaxial with axis "0", for mounting the coupling device on the woxking tool. The mounting of the coupling device on the working tool may be accomplished by known means, such as a key type or bayonet type securing device, or by the apparatus disclosed in Belgian Patent 890951.
Block or housing 10 has a pair of cylinders 32 and 34 in which a pair of pistons 36 and 38 and their piston rods 44 and 46 are mounted for sliding movement. Piston rods 44 and 46 are connected, respectively, to jaws 22 and 24. "0" rings or other known seals 40 and 42 provide fluid tight sealing of the pistons in their respective chambers so that the pistons 2~57 may be activated by pneumatic or other pressurized fluid.
The left side of each piston is connected to a source of compressed air (not shown) by appropriate pipes or conduits (also not shown).
Compressed air to operate the cylinders may be obtained from the pneumatic circuit of the percussion tool to which the coupling device is connected. The application of pressurized fluid to the left of each of the pistons 36 and 38 causes the pistons to move to the right from the position shown in FIGURE 1 to the positions shown in FIGURES 2 and 3, successively. Helical return springs 48 and ~0 are posi~ioned around the piston rods 44 and 46 to drive the pistons 36 and 38 back to the left from the FIG~RE 3 position to the FIGURE 1 position when the pressurized air is removed from the left side of the pistons.
In the embodiment shown in FIGURES 1 through 3, it is essential that the pistons and piston rods be positioned obliquely, i.e., inclined, with respect to the axis"0" and in line with the direction of movement of jaws 22 and 24 relative to axis "0" parallel to the walls 26 and 28 of chamber 20.
Still referring to FIGURES 1 through 3,the operation of the coupling device will be described. ~ssuming that the drilling rod or taphole rod is in place with the taphole closed and it is desired to extract the rod from the furnace, the percussion machine must be connected to the taphole rod 14 to extract the rod This is effected by means of the couplirlg d~vice o~ the present invention.
21D7~57 The coupling device (which is a-ttached to the percussion tool~ is first positioned on rod 1~, with rod 14 passing through opening 16 to the point where the back wall oE
chamber 20 is brought into abutting contact with the end of rod 14. In this position, and with the pistons and jaws 22 and 24 being in the unactivated (i.e., FIGUREl) state, the jaws 22 and 24 are not in contact with rod 14. Pneumatic pressure is then introduced into the left side of pistons 36 and 38 to drive the pistons to the right while compressing springs ~8 and 50. Jaws 22 and 24 move along walls 26 and 28 to the intermediate position shown in FIGURE 2 where the gripping surfaces 22a and 24a of the jaws come into gripping contact and engagement with rod 14. From that point on (i.e., from the intermediate position shown in FIGURE 2) traction can then be exerted on rod 14 by moving the coupling device to the left as viewed in the drawings. This displacement of the coupling member is, in ~act, carried out by the operation of the percussion tool while pistons 36 and 38 remain pressurizad. Under the simultaneous action of the pneuma-tic pressure on pistons 36 and 38 and the action of the percussion tool associated with the traction or tension exerted by the jaws 22 and 24 on rod 14, the jaws are caused to move ~rom ~he position shown in FIGU~E 2 to the position shown in FIGURE 3, while at the same time the jaws are driven into biting engagement with the outer layer of the rod 14.
That is, the surfaces 22a and 24 a of the jaws actually bite or penetrate into the outer surface of rod 14 for a slight distance because of the obli~ue sliding movement of the jaws.
'-:
~20~ 7 An automatic and self-clamping ac-tion takes place in which the gripping action between the jaws and taphole rod increase in proportion to the tractive force exerted on the rod. This automatic clamping not only insures extremely reliable operation, but also prevents the rod 14 from inadvertently slipping out of the coupling device. It is to be noted that for the device to function properly, the two jaws 22 and 24 must be made out of material harder than that of rod 14, so that the biting effect described and illustrated with respect to FIGURE 3 will occur.
Wi-th the coupling to the taphole or drilling rod having been made as described in connection with FIGURES 1 r 2 and 3, the taphole may then be opened by removal of the rod from the taphole by further operation of the percussion device.
As indicated previously, it is necessary to replace the taphole rod after it has been extracted from the taphole.
Thus, the taphole rod must be disengaged from the coupling device. To effect this disengagement, the left side of pistons 36 and 38 are ven-ted to atmosphere (i.e., the pressurized fluid is removed), whereby the compressed springs 48 and 50 return the pistons, piston rods and jaws from the position of FIGURE 3 to the position of FIGURF 1. If the force of springs 48 and 50 should, for sorne reason, be insufficient to return the pistons, rods and jaws, rod 14 can be manually pushed to the left to disengage the jaws , or the percussion tool can be actuated to the right, so that its vibrations will release rod 14.
Housings lO and 12 are separable from each other in order to afford access to chamber 20 for purposes such as changing the jaws when they are worn. To this end, the housings 10 and 12 are connected together by bolts 52 (see FIGURE 4~; and these housings may be separated whenever it is desired to replace the jaws.
The inner or gripping edges 22a an 24 a of jaws 22 and 24 must be sufficiently sharp to enable them to bite into drilling rod 14, as shown in FIGURE 3. In the simplest con-figuration, edges 22a and 24a will be straight edges formed by the junction of inclined surfaces on the jaws. ~hat simplest configuration is shown in FIGURES 4 and 7, with FIGUR~ 7 depicting the jaw having penetrated into the surface of rod 14. It is, nevertheless, preferable for the edges 22a and 24a to be shaped to provide wider contact with the drilling rod than is effected in the FIGURE
4 and 7 configuration. FIGURES 5 and 6 show two variations of the edge arrangement to achieve that wider contact.
In FIGURE 5 the edges 22a and 24a have a concave shape which is essentially complimentary to the shape of the outer surface of rod 14. In the FIGURE 6 embodiment, the edges 22a ~nd 24a are each made in two convex portions (i.e., having convex portions arching from the center of the jaw to each edge). With the configuration of FIGURE 6, contact between the jaws and the rod in the position corresponding to the FIGURE 2 position is obtained at two points on two sides of a vertical axis of symmetry of the rod and jaws, thus enhancing both the gripping of the rod and the self centering action of the jaws.
Referring now to FIGURE 8, a variation of the coupling device of the present invention is shown.
::, ~L~Q7~7 In the FIGURE ~ construction, the jaws 22 and 24 aLe replaced by rollers 54 and 56 rotatably mounted on the ends of rods 44 and 46. The ends of rods 44 and 46 are bifurcated in order to receive and mount -the xollers 54 and 56 on the rods. The presence of the rollers 5~ and 56 in place of jaws 22 and 24 results in greater fle~ibility in the choice of the angle of inclination for the walls 26 and 28. In all other respects, the coupling device of FIGURE 8 is the same as that described with respect to FIGURES 1, 2 and 3, both in construction and function.
Referring now to FIGURE 9, still another embodiment of the present invention is shown. In the FIGURE 9 embodiment, the jaws consist of a pair of pivoting jaw or cam elements 66 and 68 which are mounted on pivots 70 and 72 in a chamber 64 in a block or housing 60. Another block or housing element 62 (which, as in the preceding embodiments, is affixed to the drilling machine) has a pair of cylinders 74 and 76 with pistons 78 and 80. Pistons 78 and 80 are actuated by pneumatic pressurized fluid from ~0 the left toward the right as seen in FIGURE 9 to pivot th~ jaws or cams 66 and 68 into locking engagement with rod 14. The piston rods 86 and 88 pass into compartment 60 and are articulated via connecting rods 90 and 92 to the corresponding pivoting jaws 66 and 68, respectively. The sliding movement of the pistons 78 and 80 causes the jaws 66 and 68 to pivot counterclockwise and cloc~wise, respectively, around their fulcrums 70 and 72 to effect locking engagement with and coupling to the taphole rod ~0~ 7 when pressurized fluid is introduced to the left of pistons 7~ and 80. Jaw 66 will be pivoted counterclockwise and j~w 68 will be pivoted clockwise to bring the jaws into contact with the outer surface of rod 14; and the simultaneous action of the pistons and the traction on rod : 14 will move the jaws 66 and 68 into the position shown in FIGURE 9 where the jaws bite into the rod 14. This is the position corresponding to that shown in FIGURE 3, which occurs when the drilling rod 14 is retracted from the taphole. When the left side of pistons 78 and 80 are vented to ambient, the springs 82 and 84 will drive the pistons to the left, whereby jaws or cams 66 and 68 will be pivoted in the reverse directions to disengage the jaws from rod 14, this being the position corresponding to that shown in FIGURE 1.
It will be noted that in the FIGURE 9 embodiment the pistons and piston rods may be positioned parallel to axis "0" rather than being inclined with respect to the axis. It is also to be noted that in the embodiment of FIGURE 9 the drilling rod 14 also undergoes a self-clamping action as in the previously described embodiments. That is, the greater the tractive force exerted on rod 14, the greater will be the distance to which the jaws 66 and 68 penetrate the peripheral surface of rod 14, so that there is no risk that rod 14 will slide between the jaws 66 and 6B during retraction.
The disengagement of rod 14 from the coupling device of the FIGURE 9 embodiment following extraction of the rod ,r from the taphole is effected in the same manner as in the embodimen-ts discussed previously.
In order to prevent the jaws 66 and 68 from pivoting into a position perpendicular to the axis of rod 14, which would make it extremely difficult to release the rod 14 from the coupling device, the front or right walls of chamber 64 can be constructed at a moderate angle of inclination so that the extreme position of jaws 66 and 68 on engagement with rod 14 may he approximately the position corresponding so that shown in FIGURE 9.
It is also to be noted that the jaws of the FIGURE 9 embodiment may be of different shapes, such as described with regard to FIGUR~S 5 through 7 ; and the jaws of all embodiments may be of additional alternative shapes and each may be provided with two or more transverse engaging edges.
As will be recogni~ed and understood, the coupling apparatus of the present invention is novel in its structure and operation; and it has the special advantage over the prior art in that it does not require any modification of the end of rod 14 which is to be engaged by the coupling device.
That is, the end o rod 14 to be engaged by -the coupling device may be cylindrical and smooth and does not have to be provided with special slots or grooves for engagement with 2~ the coupling device. Thus, the rod 14 may be economically produced. A further advantage is that the rods may be out of round and vary in diameter by up to 15 millimeters, and the device of the present invention will still function effectively~
Claims (19)
1. A coupling device for coupling to a rod, the coupling device including:
first housing means having a chamber therein for receiving a rod to be coupled;
jaw means in said chamber, said jaw means being movable between a first position of disengagement from the rod and a second position of engagement with and penetration into the rod;
said jaw means being of a material harder than the material of the rod;
second housing means; and actuating means in said second housing means and connected to pressurized fluid said jaw means for moving said jaw means between said first and second positions.
first housing means having a chamber therein for receiving a rod to be coupled;
jaw means in said chamber, said jaw means being movable between a first position of disengagement from the rod and a second position of engagement with and penetration into the rod;
said jaw means being of a material harder than the material of the rod;
second housing means; and actuating means in said second housing means and connected to pressurized fluid said jaw means for moving said jaw means between said first and second positions.
2. A coupling device as claimed in claim 1, wherein the coupling device has an axis, and said jaw means travel in a direction inclined with respect to said axis between said first and second positions.
3. A coupling device as claimed in claim 2, wherein said jaw means includes first and second jaw elements spaced symmetrically about said axis, each of said jaw elements having a straight gripping edge orthogonal with respect to said axis.
4. A coupling device as claimed in claim 2, wherein said jaw means includes first and second jaw elements spaced symmetrically about said axis, each of said jaw elements having a concave gripping surface.
5. A coupling device as claimed in claim 2, wherein said jaw means includes first and second jaw elements spaced symmetrically about said axis, each of said jaw elements having a pair of convex gripping surfaces.
6. A coupling device as claimed in claim 2, wherein said jaw means includes first and second roller elements rotationally mounted to said actuating means.
7. A coupling device as claimed in claim 1, wherein said jaw means includes first and second cam elements spaced symmetrically about said axis, each of said cam elements being mounted in said chamber for pivotal movement.
8. A coupling device as in claim 7, wherein said actuating means includes first piston and piston rod means positioned parallel to said axis and linkage means connecting said first piston rod to said first cam element and second piston and piston rod means positioned parallel to said axis and linkage means connected to said second piston rod to said second cam element.
9. A coupling device as claimed in any one of claims 1 to 3 wherein the coupling device has an axis and said chamber means has a pair of outer walls inclined inwardly with respect to said axis, said walls guiding said jaw means to travel in a direction inclined with respect to said axis between said first and second positions.
10. A coupling device for coupling a working tool to a taphole rod of a molten metal vessel, the coupling device including :
first housing means having a chamber therein for receiving the taphole rod to be coupled;
entrance means at the front of said first housing means for passage of said taphole rod into said chamber;
said chamber having first and second spaced outer walls symmetric about an axis of the coupling device, said first and second walls being inclined inwardly toward said axis and said entrance means;
jaw means in said chamber and adapted to move along said first and second spaced outer walls between a first position of disengagement with the taphole rod and a second position of engagement with and penetration into said taphole rod;
second housing means connected to said first housing means and adapted to be connected to the working tool; and actuating means in said second housing means and pressurized fluid connected to said jaw means for moving said jaw means along said first and second walls of said chamber between said first and second positions, said actuating means being aligned with the direction of motion of said jaw means.
first housing means having a chamber therein for receiving the taphole rod to be coupled;
entrance means at the front of said first housing means for passage of said taphole rod into said chamber;
said chamber having first and second spaced outer walls symmetric about an axis of the coupling device, said first and second walls being inclined inwardly toward said axis and said entrance means;
jaw means in said chamber and adapted to move along said first and second spaced outer walls between a first position of disengagement with the taphole rod and a second position of engagement with and penetration into said taphole rod;
second housing means connected to said first housing means and adapted to be connected to the working tool; and actuating means in said second housing means and pressurized fluid connected to said jaw means for moving said jaw means along said first and second walls of said chamber between said first and second positions, said actuating means being aligned with the direction of motion of said jaw means.
11. A coupling device as claimed in claim 10, wherein said jaw means includes first and second jaw elements, said first jaw element being guided by said first outer wall and said second jaw element being guided by said second wall element; and said actuating means includes first piston and piston rod means inclined along a line parallel to said first outer wall and connected to said first jaw element and second piston and piston rod means inclined along a line parallel to said second outer wall and connected to said second jaw element.
12. A coupling device as claimed in claim 11, wherein said first and second jaw elements are spaced symmetrically +
about said axis, each of said jaw elements having a straight gripping edge orthogonal with respect to said axis.
about said axis, each of said jaw elements having a straight gripping edge orthogonal with respect to said axis.
13. A coupling device as claimed in claim 11, wherein said first and second jaw elements are spaced symmetrically about said axis, each of said jaw elements having a concave gripping surface.
14. A coupling device as claimed in claim 11, wherein said first and second jaw elements are spaced symmetrically about said axis, each of said jaw elements having a pair of convex gripping surfaces.
15. A coupling device as claimed in claim 11, wherein said jaw elements are first and second roller elements rotationally mounted to said piston rod means.
16. A coupling device as claimed in claim 11, wherein said piston and piston rod means are pneumatically actuated from a first position to a second position to move said jaw elements from said first position thereof to said second position thereof, and further including spring means associated with each of said piston and piston rod means to act on said piston means to urge each of said piston and piston rod means and the jaw elements connected thereto from the second position of each twoard the first position of each.
17. A coupling device as claimed in claim 11, wherein said entrance means at the front of said first housing means includes a tapered lead in section and an orifice connected to said chambers, said orifice being centered on the axis of the coupling device.
18. The coupling device of claim 1 wherein, said presssurized fluid is pneumatic fluid.
19. The coupling device of claim 10 wherein, said presssurized fluid is pneumatic fluid.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU83.917 | 1982-02-03 | ||
| LU83917A LU83917A1 (en) | 1982-02-03 | 1982-02-03 | DEVICE FOR COUPLING A DRILLING ROD FROM THE CASTING HOLE OF A TANK OVEN TO THE WORKING TOOL OF A DRILLING MACHINE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1207157A true CA1207157A (en) | 1986-07-08 |
Family
ID=19729808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000420863A Expired CA1207157A (en) | 1982-02-03 | 1983-02-03 | Device for coupling a shaft furnace tap hole drilling rod to the working tool of a drilling machine |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JPS58136706A (en) |
| AT (1) | AT380563B (en) |
| AU (1) | AU559626B2 (en) |
| BE (1) | BE895749A (en) |
| BR (1) | BR8300546A (en) |
| CA (1) | CA1207157A (en) |
| DE (1) | DE3241746A1 (en) |
| ES (1) | ES8401232A1 (en) |
| FR (1) | FR2520857B1 (en) |
| GB (1) | GB2116898B (en) |
| IN (1) | IN159675B (en) |
| IT (1) | IT1161864B (en) |
| LU (1) | LU83917A1 (en) |
| MX (1) | MX159863A (en) |
| NL (1) | NL191801C (en) |
| ZA (1) | ZA83525B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3339127A1 (en) * | 1983-10-28 | 1985-05-09 | Dango & Dienenthal Maschinenbau GmbH, 5900 Siegen | GRIPING DEVICE FOR RODS INSERTIBLE INTO THE STITCH HOLE OF METALLURGICAL OFENS, IN PARTICULAR TAPPING RODS |
| LU87010A1 (en) * | 1987-10-06 | 1989-05-08 | Wurth Paul Sa | DEVICE FOR MOUNTING A CLAMP FOR THE COUPLING OF A DRILLING ROD FROM THE CASTING HOLE OF A TANK OVEN TO A DRILLING MACHINE |
| DE3803625A1 (en) * | 1988-02-06 | 1989-08-17 | Dango & Dienenthal Maschbau | METHOD AND DEVICE FOR OPENING THE STITCH HOLE OF OEFEN |
| LU87427A1 (en) * | 1989-01-16 | 1990-07-24 | Wurth Paul Sa | METHOD AND DEVICE FOR OPENING THE CASTING HOLE OF A TANK OVEN |
| LU87546A1 (en) * | 1989-06-30 | 1991-02-18 | Wurth Paul Sa | DEVICE FOR COUPLING A DRILLING ROD FROM THE CASTING HOLE OF A TANK OVEN TO THE WORKING TOOL OF A DRILLING MACHINE |
| GB2245521A (en) * | 1990-07-03 | 1992-01-08 | Psc Freyssinet Ltd | Portable pressure exerting device |
| LU88059A1 (en) * | 1992-01-27 | 1993-08-17 | Paul Wurth S.A. | DRILLING MACHINE FOR A CAST HOLE OF A TANK OVEN |
| LU88129A1 (en) * | 1992-06-10 | 1994-03-01 | Wurth Paul Sa | UNIVERSAL CHUCK FOR A DRILLING MACHINE FOR A TAP HOLE OF A TANK OVEN |
| EP0574729B1 (en) * | 1992-06-17 | 1998-12-02 | Paul Wurth S.A. | Shaft furnace taphole piercing machine |
| FR2865509B1 (en) * | 2004-01-23 | 2006-04-28 | Maurice Fallavier | POLYGONAL DEVICE FOR FASTENING A AXIS |
| KR101576685B1 (en) * | 2010-01-19 | 2015-12-21 | 현대모비스 주식회사 | Control method for electronic parking brake |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB225100A (en) * | 1924-02-26 | 1924-11-27 | Edward Richard Crisp | A tool for use in removing tubes from boilers |
| GB502432A (en) * | 1937-12-07 | 1939-03-17 | Reginald Asline Bedford | Improved device for removing drills or other articles from their shafts |
| US2463064A (en) * | 1944-05-22 | 1949-03-01 | Globe Oil Tools Co | Work handling device |
| GB665783A (en) * | 1949-08-03 | 1952-01-30 | Frederick Harrison | Machine key extractor for keys with or without gib heads |
| FR1437613A (en) * | 1965-03-25 | 1966-05-06 | Ct De Rech S De Pont A Mousson | Chuck for lathes |
| BE757888A (en) * | 1969-10-24 | 1971-04-01 | Burndy Corp | TOOL FOR DISASSEMBLY AND ASSEMBLY OF CONNECTORS |
| GB1377365A (en) * | 1972-01-19 | 1974-12-11 | Ass Eng Ltd | Fixture for locating a hollow article |
| US3814449A (en) * | 1972-10-05 | 1974-06-04 | Ruck Tool Co | Hydraulic ring chuck |
| US3861252A (en) * | 1974-03-04 | 1975-01-21 | Judelshon Industries | Air chuck for roll slitting machine |
| GB1447958A (en) * | 1975-02-26 | 1976-09-02 | Porter Co Inc H K | Tool for releasably gripping and pulling a rod |
| DE2850984A1 (en) * | 1978-11-23 | 1980-05-29 | Mannesmann Ag | DEVICE FOR SUPPORTING WORKPIECES ON LATHE |
| AT361955B (en) * | 1979-03-02 | 1981-04-10 | Ver Edelstahlwerke Ag | DEVICE FOR HITING A BUMPER |
| FR2479065A1 (en) * | 1980-03-28 | 1981-10-02 | Dietrich & Cie De | TOOL FOR DISASSEMBLY OF ELECTRODES FROM SPOT WELDING MACHINES |
| LU82943A1 (en) * | 1980-11-17 | 1981-03-26 | Wurth Anciens Ets Paul | GUIDE AND SUPPORT HEAD OF A DRILLING ROD OF THE CASTING HOLE OF A TANK OVEN AND DRILLER PROVIDED WITH SUCH A HEAD |
-
1982
- 1982-02-03 LU LU83917A patent/LU83917A1/en unknown
- 1982-11-11 DE DE19823241746 patent/DE3241746A1/en active Granted
- 1982-12-30 NL NL8205063A patent/NL191801C/en not_active IP Right Cessation
-
1983
- 1983-01-04 ES ES518779A patent/ES8401232A1/en not_active Expired
- 1983-01-07 AT AT0004183A patent/AT380563B/en not_active IP Right Cessation
- 1983-01-21 FR FR8301046A patent/FR2520857B1/en not_active Expired
- 1983-01-26 ZA ZA83525A patent/ZA83525B/en unknown
- 1983-01-28 BE BE6/47772A patent/BE895749A/en not_active IP Right Cessation
- 1983-02-01 BR BR8300546A patent/BR8300546A/en not_active IP Right Cessation
- 1983-02-02 JP JP58015999A patent/JPS58136706A/en active Granted
- 1983-02-02 MX MX196128A patent/MX159863A/en unknown
- 1983-02-03 GB GB08302922A patent/GB2116898B/en not_active Expired
- 1983-02-03 CA CA000420863A patent/CA1207157A/en not_active Expired
- 1983-02-03 AU AU10992/83A patent/AU559626B2/en not_active Ceased
- 1983-02-03 IT IT19408/83A patent/IT1161864B/en active
- 1983-02-24 IN IN121/DEL/83A patent/IN159675B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58136706A (en) | 1983-08-13 |
| AT380563B (en) | 1986-06-10 |
| BE895749A (en) | 1983-05-16 |
| LU83917A1 (en) | 1983-09-02 |
| JPH0261523B2 (en) | 1990-12-20 |
| ATA4183A (en) | 1985-10-15 |
| GB2116898B (en) | 1985-10-30 |
| MX159863A (en) | 1989-09-21 |
| ES518779A0 (en) | 1983-12-16 |
| IT8319408A1 (en) | 1984-08-03 |
| ES8401232A1 (en) | 1983-12-16 |
| AU1099283A (en) | 1983-08-11 |
| FR2520857A1 (en) | 1983-08-05 |
| ZA83525B (en) | 1984-01-25 |
| BR8300546A (en) | 1983-11-08 |
| NL8205063A (en) | 1983-09-01 |
| IN159675B (en) | 1987-05-30 |
| IT1161864B (en) | 1987-03-18 |
| IT8319408A0 (en) | 1983-02-03 |
| DE3241746A1 (en) | 1983-08-04 |
| GB2116898A (en) | 1983-10-05 |
| NL191801B (en) | 1996-04-01 |
| FR2520857B1 (en) | 1987-12-18 |
| NL191801C (en) | 1996-08-02 |
| DE3241746C2 (en) | 1991-01-17 |
| AU559626B2 (en) | 1987-03-19 |
| GB8302922D0 (en) | 1983-03-09 |
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| Date | Code | Title | Description |
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| MKEX | Expiry |