US3551999A - Butt-joining of steel bars - Google Patents

Butt-joining of steel bars Download PDF

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Publication number
US3551999A
US3551999A US690214A US3551999DA US3551999A US 3551999 A US3551999 A US 3551999A US 690214 A US690214 A US 690214A US 3551999D A US3551999D A US 3551999DA US 3551999 A US3551999 A US 3551999A
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United States
Prior art keywords
sleeve
rods
steel
sleeves
bars
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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 - Lifetime
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US690214A
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English (en)
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Siegfried Gutmann
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Individual
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Individual
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B17/00—Connecting constructional elements or machine parts by a part of or on one member entering a hole in the other and involving plastic deformation
    • F16B17/004—Connecting constructional elements or machine parts by a part of or on one member entering a hole in the other and involving plastic deformation of rods or tubes mutually
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F15/00—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire
    • B21F15/02—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire
    • B21F15/06—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with wire with additional connecting elements or material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
    • E04C5/165—Coaxial connection by means of sleeves
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/16—Sealing arrangements on wings or parts co-operating with the wings
    • E06B7/22—Sealing arrangements on wings or parts co-operating with the wings by means of elastic edgings, e.g. elastic rubber tubes; by means of resilient edgings, e.g. felt or plush strips, resilient metal strips
    • E06B7/232—Resilient strips of hard material, e.g. metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B4/00—Shrinkage connections, e.g. assembled with the parts at different temperature; Force fits; Non-releasable friction-grip fastenings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/04—Clamping or clipping connections
    • F16B7/0406—Clamping or clipping connections for rods or tubes being coaxial
    • F16B7/0426—Clamping or clipping connections for rods or tubes being coaxial for rods or for tubes without using the innerside thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49927—Hollow body is axially joined cup or tube
    • Y10T29/49929—Joined to rod
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/49—Member deformed in situ
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/57—Distinct end coupler

Definitions

  • a tubular sleeve is placed over a pair of aligned endbutted steel bars.
  • the steel bars are compressed by totally surrounding jaws to cold-flow the tubular sleeve around the steel bars over the entire surrounded surfaces thereof; preferably, the tubular sleeve has internal, inclined serrations so that, upon compression, axial forces arise tending to press the steel bars towards each other; steel wires may be inserted prior to the compression step t0 further increase the tensile strength of the joint.
  • the present invention relates to the butt-joining of steel bars and more particularly to butt-joining of structural steel members such as are used in connection with reinforced concrete, to provide a rapid and durable process of joining steel bars which can be carried out right at a construction site, with a minimum of expense, and still provide joints having full load-bearing strength both in tension, and in compression equal of that of the bars themselves.
  • connections made by adhesion with epoxy resins are even more sensitive to contamination by moisture or dirt.
  • the heat-resistance of such connections is very low and further little is known about the properties of resins for long periods of time.
  • End-butted rods can be joined by electrical butt-welding, or may be overlapped and welded by ordinary arcwelding. If the bars are to be placed into tension, a specially formed sleeve is pushed over the butted ends, then electrically Welded to the butted ends of the rods. Such a process can, however, be carried out only in a shop and it is not possible to use it on bars already cast into cement. It is time-consuming to make the electrically welded connections, they require highly skilled and trained welding personnel and careful supervision and inspection. Additionally, the welded joints decrease the load carrying capacity of the rods, with a given diameter, by about 20% It has also been proposed to interconnect a pair of abutting steel rods by a cold-ow process.
  • a tubular sleeve is slipped over the two rods, and pressed thereagainst.
  • the known process is comparatively expensive, requires cornplicated internally toothed surfaces formed with clamping jaws and deformable inserts, which inserts supposedly cold-How upon compression of the sleeve. It has been found that substantial portions of the packing, intended to cold-ow, remains at the point between the rods, so that their load-bearing capacity is lost, and that the interior parts of the sleeves contact the rods only at points along the toothed inserts, leaving hollow' spaces which cannot accept any longitudinal forces.
  • Such joints are, therefore, expensive and complicated and, since the endabutting rods do not have end-to-end Contact, commercially as well as technically uneconomical joints will be produced.
  • a tubular sleeve is placed over two, abutting rods.
  • the inner surface of the sleeve, or the outer surface of the rod has inclined serrations thereon, the direction of inclination being such that the rods are pressed to gether; for example, the rods, in accordance with custom, are cross-ribbed or have external projections.
  • Radial pressure is applied to the sleeve across the entire cross-sec ⁇ tional area of the walls thereof, exclusively directed in a plane transverse to the axial direction of the sleeves and rods, by means of compression jaws, operating with such high pressure that the sleeve-material will flow practically at the entire circumferential surfaces adjacent the ends of the rods, and thus join the rods tightly and non-releasably together.
  • the tubular sleeve has, at its inner surface, toothed regions, directed in opposite directions in such a manner that axial forces will arise tending to push the reinforcement rods together when the sleeve is compressed transversely to the axial direction.
  • toothed regions directed in opposite directions in such a manner that axial forces will arise tending to push the reinforcement rods together when the sleeve is compressed transversely to the axial direction.
  • each one of the rods has a half-sleeve pressed thereon having a pre-finished end, ush 'with the end of the rods; to provide a completely ush surface, if feasible, an additional surface preparation step may be used.
  • the two rods, with their end-sleeves thereover, are then surrounded by one of the tubular sleeves which are cold-worked around rods and end sleeves.
  • the method of the present invention enables the production of a simple, strong joint which can be made directly at a construction site, by cold-flowing.
  • the sleeve may be of any metal, for example aluminum, soft carbon steel, or pure iron, having each one of the rods to be joined inserted therein to half its length.
  • the sleeve is then placed in a pressure tool, having a semi-circular recess therein (or, alternatively, a portable tool is placed around the sleeve, in situ).
  • the half-round recess is preferably slightly smaller than the outer diameter of the sleeve.
  • a similar counter die is placed against the rst work-die and the two dies are pressed together by means of a hydraulic press until the material of the sleeve completely covers and surrounds all surfaces of the ends of the rods. Pressures of from 50 to 250 tons are necessary.
  • the junction can be used immediately after pressing, and both rods are connected together by a joint strong in both tension and compression.
  • the radial forces are supplied by magnetic deformation, or by explosion pressure over liquid media.
  • Constructional steel according to the usual specification can be used, as well as the soft steels of reinforcement rods, the semi-hard steels and hard steels (see specifications DIN 1045, Groups I, IIa Illa, IIIb, IVa and semi hard steel of Groups II and III).
  • the present invention is particularly applicable to ribbed reinforcement rods, for example cold-deformed (twisted) torsional steel.
  • Self-hardening manganese and silicon containing constructional steel can also be butt-joined in accordance with the process of the present invention.
  • the diameter of the rods to be joined is determined by the eventual use, customarily between 7 and 26 mm.
  • Rods of small diameter for example 14 mm.
  • Larger rods may require more pressure steps, axially located one-behind-the-other.
  • pressure is applied in line with one end of the rods, and a second application of pressure at the opposite side of the other rod.
  • the time duration of application of pressure, to provide for cold-liowing, is in the order of a minute.
  • a manometer can be used as a measure to sense the compression of the sleeve.
  • the material to be used for the sleeves is chosen in accordance with the wall thickness left when passing over ribs or projections on the rods to be joined, as well as in dependence on the strength requirements of the joint, the availability of compressive force, and the eventual outer diameter of the sleeve.
  • Steel sleeves only require 26 of the wall thickness for equal strength with respect to aluminum sleeves.
  • the compressive force necessary when using steel is approximately less than that for aluminum.
  • Rods of, for example, 1 inch diameter, joined in accordance with the present invention may utilize a sleeve having an internal diameter of 30 mm., a length of about 4 inches and are made of aluminum.
  • the outer diameter of the sleeve will be 66 mm, and, when utilizing two pressure steps, pressure of 200 tOnS Will be applied, Which Will correspond to a per-unit pressure of 7.5 to 8 t./cm.2. lf, however, steel is chosen as the material for the sleeve, an external diameter of 42 mm. su'lces. A single application of pressure of to 160 tons (corresponding to 6-7 t./cm.2) can be used. In both instances, the sleeve material will fully ilow between ribs or beads on the ends of the rods. A strain test was made; the strength of the junction is greater than that of the rods themselves, the break occurring in the rod beyond the junction.
  • the pressure must be applied sequentially in order to retain the required per-unit pressure, for example four sequential pressing steps may be necessary, on two-each axially shifted points surrounding the rods to be connected.
  • the choice of the material for the sleeves can be influenced by the thermal loading and thermal resistance depending on building code requirements, for example in case of re.
  • the limit for steel is at about 400 C.
  • the limit for aluminum is at about 200 C., or even less.
  • Steel sleeves can be made of ordinary soft steel, that is soft carbon steel or over 0.1 percent C (specification DIN 2391).
  • the sleeves may be made of precision tubes manufactured from seamless drawn carbon steel tubing. If pure iron is used, the wall thicknes of the sleeve has to be suitably chosen to compensate for the lower strength thereof. If high thermal loading is not expected, sleeves may be made of pure or alloyed aluminum, which can be pressed readily and which ows. A complete, tight junction is obtained upon application of pressure causing the aluminum to flow since, after metal had been worked to cold-flow, no spring-back will occur.
  • the joint made in accordance with the present invention provides for rods which are non-releasably connected together, that is the rods can transfer compression as well as tensile forces to their fullest extent.
  • the rods In order to provide for full tensile transfer of strength, the rods should have suitable shear surfaces in order to securely carry shear forces. At least, the surface should be roughened at the outside, in order to inhibit longitudinal shifting. The normal surface roughness of naturally hardened steel is suitable.
  • the internal surface of the sleeves can be toothed, with the teeth directed inwardly in order to provide for axial forces against the rods upon application of radial forces.
  • the pressure jaws may be formed with slightly double-conical outer surfaces in order to prevent sleeve material from flowing away from the butt joint, causing lateral shifting of the rods.
  • the sleeve, itself, can be slightly conical as required.
  • the sleeve may, in the region where the rods butt against each other, have a slight internal groove or recess in order to further prevent penetration of sleeve material between the rods and thus their separation.
  • the sleeves may be pre-heated in order to decrease the forces necessary by the pressure jaws.
  • the method according to the present invention may be used in order to join steel rods of any desirable length, for example, in reinforced cement construction, and before the reinforcing rods are built into the cement forms.
  • any kind of structural elements can be joined by means of butt-joints directly.
  • the joints of the present invention have the advantage that the sleeve is simple, inexpensive, and largely insensitive against minor contamination by dirt or moisture. The transfer of force does not occur by adhesion, but rather by connection to the joining member.
  • the junction can be made in any position, vertically, horizontally, or at any desired angle, and may be made by hand presses customary for clamping and joining of wire ropes. Such portable hand presses are particularly suitable for the joining of reinforcing rods directly at a construction site although, in shop operation, stationary hydraulic presses with suitable dies, corresponda ing to the various rod-diameters, would be preferred.
  • FIG. 1 shows a form of the butt joint connection in accordance with the invention, partly broken away;
  • FIG. 2 shows a sleeve used for making a connection, at the left-hand side before, and at the right-hand side after the compression step, in cross section;
  • FIG. 3 is a cross sectional view of rod to be compressed, with sleeve applied, and in the tool, prior to the pressure step;
  • FIG. 4 is a view similar to FIG. 3 at the end of the pressure step
  • FIG. 5 is a partial longitudinal view, before the pres sure step, with an internally toothed sleeve
  • FIG. 6 is a partially broken away longitudinal sectional view with inserted wires
  • FIG. 7 is a partial longitudinal view of the sleeve, at the left-hand side before, and at the right-hand side after compression;
  • FIG. 8 is a transverse sectional view with inserted wires, and applied sleeve, before the pressure step;
  • FIG. 9 is a view similar to FIG. 8 after the pressure step.
  • FIG. l is a partial broken, partial cross sectional longitudinal view of a pressure joint having a pair of internally applied auxiliary sleeves, and a covering outer sleeve.
  • FIG. 1 A pair of reinforcing rods 1, 2, are joined by an external sleeve 3 applied thereover.
  • FIG. 2 clearly shows the sleeve before, and after compression, the cross sectional area of the sleeve, and its shape, and the change thereof after compression ⁇ being clearly seen.
  • the material of the sleeve tightly surrounds the entire circumference and the surface of the rods.
  • FIGS. 3 and 4 illustrate the two pressure jaws 4, 5, having semi-cylindrical recesses y6, 7, the circumference of which is slightly smaller than the outer shape of the sleeve before the pressure step.
  • the surfaces of the grooves 6, 7 tightly surround the sleeve and the outer surface exactly conforms to the shape of the dies 4, 5, as seen best in FIG. 4.
  • the internal surface of the sleeve is completely in contact, throughout its entire circumference, with the surface of the rods 1, 2.
  • a small flash or ridge at the juncture of the two die parts 4, 5, is removed by the compression operation, it may remain in place, or may be removed by any other suitable tool.
  • FIG. illustrates a sleeve 8, having on both of its sleeve halves internal teeth 9 inclined in opposite direction in order to provide for axially directed forces in the direction of arrows 10 to press the ends of rods 1, 2 against each other.
  • the sleeve is further formed with a central circular groove 11 which prevents penetration of metal into gap between the rods to be joined together.
  • FIGS. 6 to 9 illustrate a pair of reinforcing rods 21, 22, and longitudinally extending steel wires 24, interconnected by means of a metal sleeve which is cold-flowed over the assembly of the rods 21, 22 and the steel wires 24.
  • the steel wires best seen in FIGS. 7 and 8, and loose in the sleeve before the compression process, tightly close the outer surface, and its profile during the compression step, as best seen by comparing the left and right halves of FIG. 7, and the cross sectional view of FIG. 6.
  • the high tensile strength of steel wires prevents an internal shifting of the reinforcing rods under tension. After compression, they are completely enclosed by sleeve material which, throughout its entire length, passes between the various steel wires (see FIG. 9) and is in intimate contact with both the steel wires and the reinforcing rods.
  • FIG. l0 illustrates a pair of reinforcing rods 31, 32, on which initial half-sleeves 33, 34, are applied, by compression as previously described in connection with FIGS. 3 and 4.
  • the end faces of the intermediate sleeves 33, 34 are preferably perfectly flat. Additionally, the end faces of the rods 31, 32 with the half-sleeves 33, 34 applied thereto can be worked to present perfectly at surfaces, which can readily be contacted without a gap (FIG. 10 shows such a gap for illustration only).
  • An outer sleeve 36 is then slipped over the interior small sleeves 33, 34, and compressed thereover as previously described in connection with FIGS. l, 2, 3 and 4.
  • the outer sleeve extends beyond inner sleeves 33, 34 to tightly interconnect the rods 31, 32 themselves.
  • the outer ends of sleeves 33, 34 preferably taper to the diameter of the rods, as seen in FIG. 10. The thus formed shoulders prevent any possible opening of the compressed sleeves and readily transmit tensile stresses.
  • one of said surfaces being shaped to have inclined serrations, the inclinations of said serrations being directed to tend to press said bars together upon engagement of the sleeve with said bars;
  • said cold-flowing step comprising completely enclosing the outer tubular circumference of said sleeve by compression means, applying force transversely to the axial direction of the sleeve under such pressure that the sleeve material will ow substantially over the entire surface of the bar portions within the sleeve, axial forces being applied by said inclined serrations during said compression step to tend to press the end faces of said bars together into tightly abutting relation while non-releasably tightly surrounding said bar portions.
  • step of cold-flowing comprises sequentially applying transverse pressure by said compression means; and moving said mean axially of said rods during sequential compression steps.
  • Method according to claim 1 including the step of heating to below the recrystallization point said sleeve in advance of said cold-flowing step.
  • Method according to claim 1 including the step of inserting high tensile strength steel wire within said sleeve and extending for a length sufficient to bridge the abutting end faces of the bars prior to the cold-flowing step; and cold-flowing said sleeve over the assembly of bars and steel wires.
  • Method according to claim 1 including the step of applying a half-sleeve to each of said bars, said half-sleeve terminating flush with the end of said bar and having an outer surface; cold-flowing said half-sleeves, each, over the ends of said bars, each, said cold-flowing step comprising enclosing the outer surfaces of the half-sleeve by compression means moved transversely of the axial direction of the half-sleeve;
  • tubular sleeve being longer than both said half-sleeves together and extending therebeyond at either end;
  • said coldowing step comprises compressing said tubular sleeve by means of movable compression jaws, said compression jaws having a recess formed therein to accomodate said sleeve, said recesses, together, being slightly smaller than said tubular sleeve when in uncompressed state.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Forging (AREA)
US690214A 1966-12-14 1967-12-13 Butt-joining of steel bars Expired - Lifetime US3551999A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG0048735 1966-12-14

Publications (1)

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US3551999A true US3551999A (en) 1971-01-05

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US (1) US3551999A (de)
AT (1) AT282903B (de)
BE (1) BE707934A (de)
CH (1) CH464609A (de)
DE (1) DE1500759B1 (de)
DK (1) DK128749B (de)
FR (1) FR1552292A (de)
GB (1) GB1174154A (de)
NL (1) NL152046B (de)
SE (1) SE343652B (de)

Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3729218A (en) * 1967-12-06 1973-04-24 S Gutmann Butt joining of steel bars and connection assembly therefor
US3733681A (en) * 1968-05-16 1973-05-22 Tanner Manuf Co Method of forming gripping device
US3737975A (en) * 1970-07-15 1973-06-12 Kinnon C Mc Arrangement for explosively formed connections and method of making such connections
US3769678A (en) * 1972-05-10 1973-11-06 Stricon Prod Ltd Splicer for reinforcing bars
US3871071A (en) * 1973-09-24 1975-03-18 Thomas & Betts Corp Method of forming an electrical connection
US3921281A (en) * 1971-10-28 1975-11-25 Daido Steel Co Ltd Method for joining steel bars
US4019241A (en) * 1975-11-10 1977-04-26 Thomas & Betts Corporation Method of splicing elongate members
US4095389A (en) * 1976-04-20 1978-06-20 Ccl Systems Limited Joined concrete bodies and method of joining same
US4223497A (en) * 1978-06-26 1980-09-23 Ccl Systems Limited Coupling assembly
US4241490A (en) * 1976-05-14 1980-12-30 CCL Systems, Limited Method of applying metal sleeve to concrete reinforcing bar, metal sleeve and swaged connection
US4390303A (en) * 1980-08-06 1983-06-28 Nadella Torque tube-to-universal joint yoke deformation coupling
US4461063A (en) * 1981-08-26 1984-07-24 Columbus Auto Parts Company Prevailing torque adjusting element and method and apparatus for the construction thereof
US4469465A (en) * 1981-09-10 1984-09-04 Andrus James S Rebar coupler
US4506423A (en) * 1980-12-24 1985-03-26 Hitachi, Ltd. Method of producing a fluid pressure reducing device
US4712294A (en) * 1985-10-21 1987-12-15 Hughes Aircraft Company Method of forming a helical wave guide assembly by precision coining
US5664902A (en) * 1995-01-26 1997-09-09 Barsplice Products, Inc. Tubular coupler for concrete reinforcing bars
US5692853A (en) * 1995-11-27 1997-12-02 Curtiss Wright Flight Systems Inc. Threaded joint construction and rod assembly incorporating same
US5713686A (en) * 1995-09-25 1998-02-03 Dana Corporation Prevailing-torque adjusting sleeve
US5909980A (en) * 1995-01-26 1999-06-08 Barsplice Products, Inc. Tubular coupler for concrete reinforcing bars
US6036451A (en) * 1998-03-03 2000-03-14 Badger; Omer R. Shaft assemblies for lineshaft turbine pump
US20020112337A1 (en) * 2001-01-23 2002-08-22 Gregel John J. Reinforcing bar tool and method
US6571452B1 (en) 1999-01-19 2003-06-03 Barsplice Products, Inc. Method of making steel couplers for joining concrete reinforcing bars
FR2836653A1 (fr) * 2002-02-21 2003-09-05 Jidosha Denki Kogyo Kk Procede de matage de tubes et systeme de matoir utilise dans le procede
US20030198513A1 (en) * 2000-11-21 2003-10-23 Barsplice Products, Inc. Method of making steel couplers for joining concrete reinforcing bars
WO2003093601A1 (en) * 2002-05-01 2003-11-13 Ultimate Design Solutions Ltd Coupling device
US6719478B2 (en) 2001-01-23 2004-04-13 Erico International Corporation Reinforcing bar connection and method
US20040071507A1 (en) * 2001-02-14 2004-04-15 Kim Yong-Keun Reinforcing bar coupling
US20040086330A1 (en) * 2001-01-23 2004-05-06 Gregel John J. Reinforcing bar connection and method
US6851172B2 (en) * 2000-01-27 2005-02-08 Willy Voit Gmbh & Co. Stanz- Und Metallwerk Method for securing a rod-shaped part in a holding member
US20080060291A1 (en) * 2006-09-08 2008-03-13 Dextra Asia Co., Ltd. Device for connecting bars end-to-end
US20080172979A1 (en) * 2007-01-19 2008-07-24 Wilson Eric J Reinforcing bar splice with cutting edge bolts
CN101881066A (zh) * 2010-06-25 2010-11-10 罗勇 一种钢筋连接套筒
US20110052343A1 (en) * 2009-09-03 2011-03-03 Hilti Aktiengesellschaft Fastening element and method for producing a fastening element
US20140227024A1 (en) * 2013-02-11 2014-08-14 Robert Gilling Assembly for connecting rebar segments
US20150337533A1 (en) * 2013-08-28 2015-11-26 Jong-Youl Lee Apparatus for coupling reinforcing bar using hydraulic pressure
US20160084282A1 (en) * 2013-03-15 2016-03-24 Hlt, Inc. Stress Concentration Reduction Method And Design For Improved Fatigue Performance
ES2573143A1 (es) * 2014-12-05 2016-06-06 Bsh Electrodomésticos España, S.A. Método de montaje de una polea y máquina de tratamiento de ropa con dicha polea
CN106363107A (zh) * 2016-11-09 2017-02-01 河北易达钢筋连接技术有限公司 扣压装置及钢筋连接用机床
CN110725480A (zh) * 2019-10-29 2020-01-24 中建七局安装工程有限公司 一种钢筋对接方法及钢筋对接组件
US11242683B2 (en) * 2017-06-12 2022-02-08 Jeil Wire Production Co., Ltd. Reinforcing bar coupler
US11454268B2 (en) * 2017-07-20 2022-09-27 Illinois Tool Works Inc. Coupler for threaded reinforcing bar
CN115233908A (zh) * 2022-09-23 2022-10-25 河北易达钢筋连接技术有限公司 一种改进型钢筋挤压连接套筒组件
US20220356893A1 (en) * 2021-05-04 2022-11-10 Illinois Tool Works Inc. Coupler for threaded reinforcing bar
CN115614354A (zh) * 2022-09-30 2023-01-17 香港理工大学 用于混凝土结构frp筋的楔形连接接头
US12049765B2 (en) 2021-07-20 2024-07-30 Life Coded, Llc Portable hot swaged coupling device for connecting articles

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS537732B1 (de) * 1971-02-19 1978-03-22
DE2952557C2 (de) * 1979-12-28 1982-04-29 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Spannelement zum Verbinden von Teilen, insbesondere von Teilen bei Haushaltgeräten
DE3149596A1 (de) * 1981-12-15 1983-06-23 Uni-Cardan Ag, 5200 Siegburg Verbindung von teilen
CN112108593A (zh) * 2020-09-03 2020-12-22 王晓明 一种钢筋连接装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE663175C (de) * 1938-07-30 Ventzki G M B H Maschf Vorrichtung zur Verbindung mehrerer nebeneinanderliegender Staebe
US1109258A (en) * 1913-10-06 1914-09-01 Edwin E Slick Spliced reinforcing-bar.
US1643150A (en) * 1925-12-04 1927-09-20 American Cable Co Inc Attachment for wire strand and process for producing the same
US1727896A (en) * 1927-04-04 1929-09-10 Joseph L Mraz Apparatus for making tubular joints
US2022977A (en) * 1931-02-05 1935-12-03 Bell Telephone Labor Inc Joint in line wires
US2799721A (en) * 1953-01-09 1957-07-16 Amp Inc Connector
GB863676A (en) * 1957-07-03 1961-03-22 British Ropes Ltd Improvements in or relating to the joining of wire ropes or strands
US2998696A (en) * 1959-04-13 1961-09-05 Slater N Co Ltd Gripping surface for preformed helical rods
DE1231407B (de) * 1960-08-19 1966-12-29 Zueblin Ag Stossverbindung fuer Betonbewehrungsstaebe
DE1828164U (de) * 1961-01-17 1961-03-16 Pfisterer Elektrotech Karl Zugfester pressverbinder fuer stahl-aluminium-seile.
DE1200614B (de) * 1961-02-16 1965-09-09 Cable Covers Ltd Kupplungsmuffe fuer Stangen, Kabel, Drahtseile od. dgl.

Cited By (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3729218A (en) * 1967-12-06 1973-04-24 S Gutmann Butt joining of steel bars and connection assembly therefor
US3733681A (en) * 1968-05-16 1973-05-22 Tanner Manuf Co Method of forming gripping device
US3737975A (en) * 1970-07-15 1973-06-12 Kinnon C Mc Arrangement for explosively formed connections and method of making such connections
US3921281A (en) * 1971-10-28 1975-11-25 Daido Steel Co Ltd Method for joining steel bars
US3769678A (en) * 1972-05-10 1973-11-06 Stricon Prod Ltd Splicer for reinforcing bars
US3871071A (en) * 1973-09-24 1975-03-18 Thomas & Betts Corp Method of forming an electrical connection
US4019241A (en) * 1975-11-10 1977-04-26 Thomas & Betts Corporation Method of splicing elongate members
US4095389A (en) * 1976-04-20 1978-06-20 Ccl Systems Limited Joined concrete bodies and method of joining same
US4241490A (en) * 1976-05-14 1980-12-30 CCL Systems, Limited Method of applying metal sleeve to concrete reinforcing bar, metal sleeve and swaged connection
US4223497A (en) * 1978-06-26 1980-09-23 Ccl Systems Limited Coupling assembly
US4390303A (en) * 1980-08-06 1983-06-28 Nadella Torque tube-to-universal joint yoke deformation coupling
US4506423A (en) * 1980-12-24 1985-03-26 Hitachi, Ltd. Method of producing a fluid pressure reducing device
US4461063A (en) * 1981-08-26 1984-07-24 Columbus Auto Parts Company Prevailing torque adjusting element and method and apparatus for the construction thereof
US4469465A (en) * 1981-09-10 1984-09-04 Andrus James S Rebar coupler
US4712294A (en) * 1985-10-21 1987-12-15 Hughes Aircraft Company Method of forming a helical wave guide assembly by precision coining
US5664902A (en) * 1995-01-26 1997-09-09 Barsplice Products, Inc. Tubular coupler for concrete reinforcing bars
US5909980A (en) * 1995-01-26 1999-06-08 Barsplice Products, Inc. Tubular coupler for concrete reinforcing bars
US6202282B1 (en) 1995-01-26 2001-03-20 Barsplice Products, Inc. Method of making a tubular coupler for concrete reinforcing bars
US5713686A (en) * 1995-09-25 1998-02-03 Dana Corporation Prevailing-torque adjusting sleeve
US5692853A (en) * 1995-11-27 1997-12-02 Curtiss Wright Flight Systems Inc. Threaded joint construction and rod assembly incorporating same
US6036451A (en) * 1998-03-03 2000-03-14 Badger; Omer R. Shaft assemblies for lineshaft turbine pump
US6571452B1 (en) 1999-01-19 2003-06-03 Barsplice Products, Inc. Method of making steel couplers for joining concrete reinforcing bars
US6851172B2 (en) * 2000-01-27 2005-02-08 Willy Voit Gmbh & Co. Stanz- Und Metallwerk Method for securing a rod-shaped part in a holding member
WO2004098807A1 (en) * 2000-11-21 2004-11-18 Barsplice Products, Inc. Method of making steel couplers for joining concrete reinforcing bars
US7032286B2 (en) * 2000-11-21 2006-04-25 Barsplice Products, Inc. Method of making steel couplers for joining concrete reinforcing bars
US20030198513A1 (en) * 2000-11-21 2003-10-23 Barsplice Products, Inc. Method of making steel couplers for joining concrete reinforcing bars
US7118299B2 (en) 2001-01-23 2006-10-10 Erico International Corporation Reinforcing bar connection and method
US6719478B2 (en) 2001-01-23 2004-04-13 Erico International Corporation Reinforcing bar connection and method
US20040086330A1 (en) * 2001-01-23 2004-05-06 Gregel John J. Reinforcing bar connection and method
US20020112337A1 (en) * 2001-01-23 2002-08-22 Gregel John J. Reinforcing bar tool and method
US6966104B2 (en) 2001-01-23 2005-11-22 Erico International Corporation Reinforcing bar tool and method
US20040071507A1 (en) * 2001-02-14 2004-04-15 Kim Yong-Keun Reinforcing bar coupling
US6860672B2 (en) * 2001-02-14 2005-03-01 Kim Yong-Keun Reinforcing bar coupling
FR2836653A1 (fr) * 2002-02-21 2003-09-05 Jidosha Denki Kogyo Kk Procede de matage de tubes et systeme de matoir utilise dans le procede
US20050072102A1 (en) * 2002-05-01 2005-04-07 Ian Hopwood Coupling device
US7093402B2 (en) 2002-05-01 2006-08-22 Ultimate Design Solutions Ltd. Coupling device
US7107735B2 (en) 2002-05-01 2006-09-19 Ultimate Design Solutions Ltd. Coupling device
WO2003093601A1 (en) * 2002-05-01 2003-11-13 Ultimate Design Solutions Ltd Coupling device
US20080060291A1 (en) * 2006-09-08 2008-03-13 Dextra Asia Co., Ltd. Device for connecting bars end-to-end
US20080172979A1 (en) * 2007-01-19 2008-07-24 Wilson Eric J Reinforcing bar splice with cutting edge bolts
US20110052343A1 (en) * 2009-09-03 2011-03-03 Hilti Aktiengesellschaft Fastening element and method for producing a fastening element
CN101881066A (zh) * 2010-06-25 2010-11-10 罗勇 一种钢筋连接套筒
US20140227024A1 (en) * 2013-02-11 2014-08-14 Robert Gilling Assembly for connecting rebar segments
US9506250B2 (en) * 2013-02-11 2016-11-29 Robert Gilling Assembly for connecting rebar segments
US20160084282A1 (en) * 2013-03-15 2016-03-24 Hlt, Inc. Stress Concentration Reduction Method And Design For Improved Fatigue Performance
US9528537B2 (en) * 2013-03-15 2016-12-27 Hlt, Inc. Stress concentration reduction method and design for improved fatigue performance
US9551151B2 (en) * 2013-08-28 2017-01-24 Jong Ryul Lee Apparatus for coupling reinforcing bar using hydraulic pressure
US20150337533A1 (en) * 2013-08-28 2015-11-26 Jong-Youl Lee Apparatus for coupling reinforcing bar using hydraulic pressure
ES2573143A1 (es) * 2014-12-05 2016-06-06 Bsh Electrodomésticos España, S.A. Método de montaje de una polea y máquina de tratamiento de ropa con dicha polea
CN106363107A (zh) * 2016-11-09 2017-02-01 河北易达钢筋连接技术有限公司 扣压装置及钢筋连接用机床
CN106363107B (zh) * 2016-11-09 2018-05-04 河北易达钢筋连接技术有限公司 扣压装置及钢筋连接用机床
US11242683B2 (en) * 2017-06-12 2022-02-08 Jeil Wire Production Co., Ltd. Reinforcing bar coupler
US11454268B2 (en) * 2017-07-20 2022-09-27 Illinois Tool Works Inc. Coupler for threaded reinforcing bar
CN110725480A (zh) * 2019-10-29 2020-01-24 中建七局安装工程有限公司 一种钢筋对接方法及钢筋对接组件
CN110725480B (zh) * 2019-10-29 2023-12-08 中建七局安装工程有限公司 一种钢筋对接方法及钢筋对接组件
US20220356893A1 (en) * 2021-05-04 2022-11-10 Illinois Tool Works Inc. Coupler for threaded reinforcing bar
US12253106B2 (en) * 2021-05-04 2025-03-18 Illinois Tool Works Inc. Coupler for threaded reinforcing bar
US12049765B2 (en) 2021-07-20 2024-07-30 Life Coded, Llc Portable hot swaged coupling device for connecting articles
US12509894B2 (en) 2021-07-20 2025-12-30 Life Coded, Llc Portable hot swaged coupling device for connecting articles
CN115233908A (zh) * 2022-09-23 2022-10-25 河北易达钢筋连接技术有限公司 一种改进型钢筋挤压连接套筒组件
CN115233908B (zh) * 2022-09-23 2023-01-17 河北易达钢筋连接技术有限公司 一种改进型钢筋挤压连接套筒组件
CN115614354A (zh) * 2022-09-30 2023-01-17 香港理工大学 用于混凝土结构frp筋的楔形连接接头

Also Published As

Publication number Publication date
GB1174154A (en) 1969-12-17
BE707934A (de) 1968-04-16
FR1552292A (de) 1969-01-03
DE1500759B1 (de) 1970-12-10
SE343652B (de) 1972-03-13
NL152046B (nl) 1977-01-17
AT282903B (de) 1970-07-10
DK128749B (da) 1974-06-24
CH464609A (de) 1968-10-31
NL6717048A (de) 1968-06-17

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