US3554492A - Apparatus for drawing an anchor head on a rod or a tight cable - Google Patents

Apparatus for drawing an anchor head on a rod or a tight cable Download PDF

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Publication number
US3554492A
US3554492A US775603A US3554492DA US3554492A US 3554492 A US3554492 A US 3554492A US 775603 A US775603 A US 775603A US 3554492D A US3554492D A US 3554492DA US 3554492 A US3554492 A US 3554492A
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US
United States
Prior art keywords
cable
cylinder
piston
annular
piston rod
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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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US775603A
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English (en)
Inventor
Rene Beghi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe des Grands Travaux de Marseille SA
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Societe des Grands Travaux de Marseille SA
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/121—Construction of stressing jacks

Definitions

  • ABSTRACT An apparatus for drawing an anchor head on a rod or a tight cable, which comprises a single hydraulic piston- [54] APPARATUS FOR DRAWING AN ANCHOR HEAD cylinder unit of which the cylinder receives the cable ON A ROD OR A TIGHT CABLE therethrough and engages with one end the base plate, and of 7Chims 3 Drawing Figs which the pistonrigid with a hollow piston rod having a die secured therein IS shdably mounted in a working chamber [52] US.
  • a hollow central punch fitted in 2,756,019 7/l956 Von Heidenstam 254/29 the bore of said hollow piston rod receives said vcable 2,844,356 7/ 195 8 Siegfried 254/29 therethrough and engages with one end the socket to be drawn 3,399,865 9/1968 Kelly 254/29 and with the opposite end said pair of transverse keys.
  • This apparatus is objectionable in that it requires the use of two separate piston-cylinder units or actuators for performing the tensioning and drawing functions, and furthermore its longitudinal dimensions are relatively important.
  • the apparatus according to the present invention for drawing an anchor head on a rod or a tight cable which comprises internally a drawing socket through which the cable extends, said drawing socket reacting through the medium of a base plate against the mass, block or structure in which the cable is embedded, and a cable clamping device mounted on the end of the cable, is characterized in that it comprises a single hydraulic piston-cylinder unit of which the cylinder receives the cable therethrough and engages with one end the base plate, and of which the piston rigid with a hollow piston rod having a die'secured therein is slidably mountedin a working chamber adapted to be connected'to a source of fluid under pressure, than an annulardistance-piece slidably mounted in said working chamber is adapted to be.
  • the cable clamping device comprises a screw-threaded portion on which a nut is engaged and tightened when the cable is tensioned, said nut holding the cable tight by reacting against the cylinder end.
  • the apparatus according to this invention is advantageous in that its design is considerably simpler than that of the previously known apparatus, since it comprises only a single pistoncylinder unit or actuator for tensioning the rod or cable and also for drawing the socket on the cable. Besides, its longitudinal dimensions are considerably shorter.
  • FIG. 3 is a view similar to FIG. 1 but showing the sameapparatus in the condition obtaining after tensioning the cable and before drawing the anchor head thereon.
  • the apparatus comprises a hydraulic piston-cylinder unit or actuator having an outer cylindrical body or cylinder 4 havingon either side of an annular shoulder 5 a pair of cylindrical chambers 6, 7 in which a return piston 8 and a working piston 9 are slidably fitted, respectively.
  • chambers 6 and 7 may be connected to a source of fluid under pressure, respectively through ports 11 and 12 opening into these chambers in the vicinity of the right-hand end of chamber 6 and left-hand end of chamber 7, respectively, as seen in the drawing.
  • the return piston 8 and working piston 9 both rigid with a common hollow rod 13 are in their innermost or lefthand position, as shown in FIG. 1.
  • a die 14 mounted inside the hollow piston rod 13 is a die 14 locked against the rod by a nut 15. This die 14 partially surrounds the socket 3 to be drawn and the tubular distance-piece l0 centered on the bearing plate 16 through which the cylinder 4 of the apparatus and the drawing socket 3 bear against the concrete mass 2.
  • the drawing socket 3 is retained between the tubular distance-piece 10 centered by the base plate 16 and an elongated hollow punch 17 through which extends the cable 1.
  • the punch 17 has a gradually stepped outer surface, and its outermost portion having the greater diameter is slidably fitted in the bore of rod 13 so that this'rod 13 can move along the punch 17.
  • punch l7 may be a cylindrical, frustoconical or otherwise shaped punch l7.
  • the outermost or right-hand end of punch 17 engages a pair of parallel transverse keys 18, 19 slidably fitted in opposite longitudinal slots 21 and 22 (see FIG. 2) for the upper key 18,
  • these keys 18, 19 are disposed against a self-clamping device 25 mounted on the cable end and having mounted therein tapered keys 26 for clamping the cable strands when the device 25 is moved to the right as seen in FIG. 1.
  • the outer surface of this device 25 is screwthreaded.
  • a distance-piece 28 comprising a cylindrical central sleeve '29 having welded thereto at either end an outer ring 31, 32 is slidably mounted in chamber 7. Before tensioning the cable, this distance-piece 28 is positioned between theright-hand end of piston 13 and the pair of keys 18, 19 located themselves between the punch 17 and the cable clamping device 25.
  • An externally threaded nut 33 formed with a central bore 34 receiving the cable 1 therethrough is screwed'in the internally screw-threaded right-hand end portion of cylinder 4.
  • This nut 33 comprises on its inner or left-hand end an extension constituting a cylindrical skirt 35 having slidably mounted thereon an annular piston 36 disposed between this skirt and the bore of cylinder 4.
  • the permissible movement of piston 36 to the left is limited by a stop ring 37 secured to the end of said skirt 35.
  • the chamber 38 in which the piston 36 is movable communicates through an orifice 39 with the source of fluid under pressure (not shown).
  • the annular cross-sectional surface area of chamber'38 is greater by at least percent to that of chamber 7.
  • piston 36 will recedeslightly and gradually as the socket 3 is elongated as a consequence of the drawing force exerted thereon, this elongation being transmitted through punch .17, transverse keys 18 and 1 9 and distance-piece 28. Therefore, piston 36 will cause an antagonistic force to be exerted against punch 17 which is greater than the reaction resulting from the drawingoperation while permitting a gradual backward movement of piston 17 as the die 3 is elongated.
  • An apparatus for drawing an anchor head on a rod or tight cable from a drawing socket receiving said cable therethrough which comprises a base plate through which said socket bears against the structure in which said cable is embedded, a cable clamping device mounted on the cable end, a single hydraulic piston and cylinder unit comprising an elongated cylinder, a cylinder bottom, aworking chamber formed within said cylinder, a working pistonslidably mounted in said working chamber and a hollow piston rod rigid with said working piston, said cylinder receiving said cable therethrough and contacting said base plate with one end, a die secured within said, hollow piston rod, an annular distance-piece slidably rnounted in the working chamber of said cylinder, longitudinal slots formed through said cylinder, a pair of transverse keys adapted to slide in said slots, said annular distance-piece being interposed, during the tensioning of said cable, between said hollow piston rod and said pair of transverse keys, said transverse keys also bearing against said cable clamping device, said annular distance-piece
  • said cable clamping device comprises an externally screw-threaded portion, said apparatus further comprising a nut adapted to engage said screw-threaded portion when said cable is tensioned, in order to hold the cable under tension by reacting against the cylinder end.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Piles And Underground Anchors (AREA)
  • Bridges Or Land Bridges (AREA)
US775603A 1967-12-26 1968-11-14 Apparatus for drawing an anchor head on a rod or a tight cable Expired - Lifetime US3554492A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR133720 1967-12-26

Publications (1)

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US3554492A true US3554492A (en) 1971-01-12

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US775603A Expired - Lifetime US3554492A (en) 1967-12-26 1968-11-14 Apparatus for drawing an anchor head on a rod or a tight cable

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US (1) US3554492A (enrdf_load_stackoverflow)
BE (1) BE723707A (enrdf_load_stackoverflow)
DE (1) DE1814988A1 (enrdf_load_stackoverflow)
FR (1) FR1556335A (enrdf_load_stackoverflow)
GB (1) GB1176439A (enrdf_load_stackoverflow)
LU (1) LU57260A1 (enrdf_load_stackoverflow)
NL (1) NL6818303A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811653A (en) * 1968-06-21 1974-05-21 Christiani And Nielson Ltd Fluid operated jacks
USB591615I5 (enrdf_load_stackoverflow) * 1975-06-30 1976-03-30
US4405114A (en) * 1980-06-12 1983-09-20 Romualdo Macchi Jack for tensioning cables in prestressed concrete structures
US4484425A (en) * 1982-07-21 1984-11-27 Figg And Muller Engineers, Inc. Anchorage of cables
US6578328B2 (en) * 2001-01-29 2003-06-17 Vsl International Ag Device for anchoring one end of a stay to a base
US20050177992A1 (en) * 2004-02-02 2005-08-18 Foege Carl A. Cable tensioning system and method of operation
US12054947B1 (en) * 2024-01-08 2024-08-06 King Faisal University Multi-layer wedge anchorage for FRP plates and FRP tendons

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1609272B1 (de) * 1963-10-11 1970-07-16 Schmitz Friedrich Wilhelm Hein Entlueftungsvorrichtung fuer ein Spuelklosett
ZA785539B (en) * 1978-09-29 1980-04-30 R Stamper A device for the removal of foul air from toilet bowls or the like
CH665444A5 (de) * 1985-01-17 1988-05-13 Losinger Ag Zwischenankeranordnung zum vorspannen von bauteilen, die in mehreren bauetappen erstellt werden, und ein verfahren zum herstellen einer solchen zwischenankeranordnung.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756019A (en) * 1947-10-23 1956-07-24 Lindman Hydraulic or pneumatic form lifter
GB772858A (en) * 1954-06-16 1957-04-17 Losinger & Co S A Method and hydraulic jack for pretensioning the reinforcing of a prestressed concrete structure
US2844356A (en) * 1955-04-15 1958-07-22 Losinger Ag Hydraulic jack for tensioning reinforcing wires of prestressed concrete structures
GB893567A (en) * 1959-08-27 1962-04-11 P S C Equipment Ltd Improvements in or relating to hydraulic jacks
US3399865A (en) * 1966-06-27 1968-09-03 William F. Kelly Jacking apparatus for posttensioning concrete

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756019A (en) * 1947-10-23 1956-07-24 Lindman Hydraulic or pneumatic form lifter
GB772858A (en) * 1954-06-16 1957-04-17 Losinger & Co S A Method and hydraulic jack for pretensioning the reinforcing of a prestressed concrete structure
US2844356A (en) * 1955-04-15 1958-07-22 Losinger Ag Hydraulic jack for tensioning reinforcing wires of prestressed concrete structures
GB893567A (en) * 1959-08-27 1962-04-11 P S C Equipment Ltd Improvements in or relating to hydraulic jacks
US3399865A (en) * 1966-06-27 1968-09-03 William F. Kelly Jacking apparatus for posttensioning concrete

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811653A (en) * 1968-06-21 1974-05-21 Christiani And Nielson Ltd Fluid operated jacks
USB591615I5 (enrdf_load_stackoverflow) * 1975-06-30 1976-03-30
US4405114A (en) * 1980-06-12 1983-09-20 Romualdo Macchi Jack for tensioning cables in prestressed concrete structures
US4484425A (en) * 1982-07-21 1984-11-27 Figg And Muller Engineers, Inc. Anchorage of cables
US6578328B2 (en) * 2001-01-29 2003-06-17 Vsl International Ag Device for anchoring one end of a stay to a base
US20050177992A1 (en) * 2004-02-02 2005-08-18 Foege Carl A. Cable tensioning system and method of operation
US7147210B2 (en) 2004-02-02 2006-12-12 Actuant Corporation Cable tensioning system and method of operation
US12054947B1 (en) * 2024-01-08 2024-08-06 King Faisal University Multi-layer wedge anchorage for FRP plates and FRP tendons

Also Published As

Publication number Publication date
NL6818303A (enrdf_load_stackoverflow) 1969-06-30
FR1556335A (enrdf_load_stackoverflow) 1969-02-07
GB1176439A (en) 1970-01-01
DE1814988A1 (de) 1969-10-16
LU57260A1 (enrdf_load_stackoverflow) 1969-02-11
BE723707A (enrdf_load_stackoverflow) 1969-04-16

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