EP0625085A1 - Dispositif de sertissage - Google Patents

Dispositif de sertissage

Info

Publication number
EP0625085A1
EP0625085A1 EP93903251A EP93903251A EP0625085A1 EP 0625085 A1 EP0625085 A1 EP 0625085A1 EP 93903251 A EP93903251 A EP 93903251A EP 93903251 A EP93903251 A EP 93903251A EP 0625085 A1 EP0625085 A1 EP 0625085A1
Authority
EP
European Patent Office
Prior art keywords
handles
crimp
jaw members
tool
crimp tube
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.)
Withdrawn
Application number
EP93903251A
Other languages
German (de)
English (en)
Inventor
Alan Crockard
Raphael Melloul
Brenda Lugo
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.)
Hillway Surgical Ltd
Original Assignee
Hillway Surgical Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from GB929202635A external-priority patent/GB9202635D0/en
Priority claimed from GB929212150A external-priority patent/GB9212150D0/en
Application filed by Hillway Surgical Ltd filed Critical Hillway Surgical Ltd
Publication of EP0625085A1 publication Critical patent/EP0625085A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8861—Apparatus for manipulating flexible wires or straps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/2804—Surgical forceps with two or more pivotal connections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/146—Clip clamping hand tools
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/2812—Surgical forceps with a single pivotal connection
    • A61B17/282—Jaws
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/2812—Surgical forceps with a single pivotal connection
    • A61B17/2833—Locking means
    • A61B2017/2837—Locking means with a locking ratchet
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/2812—Surgical forceps with a single pivotal connection
    • A61B17/2841—Handles
    • A61B2017/2845—Handles with a spring pushing the handle back

Definitions

  • the present invention relates to a crimp tool for crimping a hollow tube around a wire or cable to form a joint and, in particular, to a crimp tool for use in surgical procedures.
  • This particular form of crimped joint is particularly advantageous in surgical procedures because, once the loop is closed, the crimp tube lies flat against underlying structures and there are no projecting wire ends which might cause damage to surrounding tissues.
  • the commonly used alternatives are to close the loop by twisting the ends of the wire together or to form a different kind of crimp joint by passing both wire ends through the crimp tube from the same end, leaving the crimp tube projecting from the closed loop.
  • Both of these alternative methods leave projecting wire ends but, nevertheless, have the advantage that they permit the wire loop to be closed relatively easily.
  • the wire loop can be tightened to the required degree by further twisting of the wire ends or by sliding the crimp tube towards the bone, as the case may be.
  • the crimp can be formed relatively easily since the tube projects away from the bone into 'free space' .
  • no. 9202635.0 has the advantage that it leaves no projecting wire ends but has the disadvantage that it has hitherto been more difficult to form a reliable crimp joint with the crimp tube lying flat against the bone. It will be appreciated that the crimping operation must be sufficiently reliable to minimise the risk of the loop coming undone and the bone fragments becoming free to move at the site of a fracture. It is also important that the crimping operation should not be such that it causes the loop to loosen as the crimp is formed..
  • a crimp tool for deforming a crimp tube around at least one wire or cable; the tool having a pair of relatively long handles pivotable about a rear pivot axis toward and away from one another, each handle being extended forwardly of the rear pivot axis to form a rear jaw member, the handles having co-operating cam surfaces formed thereon such that pivoting of the handles towards one another causes the free ends of the rear jaw members to move apart; the free ends of the rear jaw members each carrying an intermediate pivot and the tool further comprising a pair of forward jaw members, the forward jaw members' being pivotable about the intermediate pivots carried by the free ends of the rear jaw members and being pivotable about a common forward pivot axis; the forward jaw members extending forwardly of the forward pivot axis so that the forward end portions thereof may engage the crimp tube to deform it; the length of the handles being substantially greater than the length of the rear jaw members and the length of the forward jaw members being substantially greater than the length of the forward end portions thereof so
  • a crimp tool for deforming a crimp tube around at least one wire or cable, the tool having a pair of handles pivotable toward and away from one another to bring a pair of opposed jaws into engagement with a crimp tube to crimp it, the tool including a first latching member carried by one handle and a second latching member carried by the other handle, the first and second latching members, in use, engaging one another when the jaws are in a partially-closed position and being so arranged that they cannot be disengaged from one another until the jaws have been moved together to a predetermined fully closed position.
  • indicator means for providing a visual indication as to when the handles have been pivoted toward one another to the fully closed position.
  • Figure 1 shows a crimp tube and a part of a wire loop around a fracture site or the like
  • Figure 2 shows a first crimp tool in accordance with the invention
  • Figure 3a and 3b are a side view and end view respectively of the jaw ends of the tool of Figure 2;
  • Figure 4 shows a modified crimp tool in accordance with the invention
  • Figures 5a and 5b are fragmentary views of the indicator of figure 4.
  • Figure 6 shows a further modified crimp tool in accordance with the invention.
  • Figure 7 is a fragmentary view of the ratchet of Figure 6.
  • the two ends of the wire 10a and 10b are passed through the crimp tube 12 from opposite ends thereof so that they lie substantially parallel to one another within the tube 12.
  • the tube 12 is crimped to deform it around the wire 10.
  • the crimp tool 100 has a pair of opposed jaws 101 and 102 which are hinged together at pivot 106. Each of the jaws 101 and 102 is itself hinged part-way along its length at pivots 103 and 104 respectively.
  • the rear part 101a and 102a of each ja 101 and 102 is extended rearwardly to form a handle 107 or 108 and the handles 107 and 108 are formed with cam surfaces (not shown) so that, as the handles 107 and 108 are moved together about pivot 106 (as shown in dotted lines in Figure 2), the ends of the rear parts of the jaws 101a and 102a carrying pivots 103 and 104 move apart.
  • each of the jaws 101 and 102 is provided with a forward jaw member 111 and 112 connected to the rear parts of the jaws at the pivots 103 and 104 respectively.
  • the forward jaw members 111 and 112 are themselves hinged together at pivot 110, close to their forward ends. .
  • the forward ends of the two forward jaw members 111 and 112 are shaped to form co-operating die surfaces 113 and 114'.
  • a crimp tube 12 is disposed between the die surfaces 113 and 114 and the forward jaw members 111 and 112 are moved together, using the handles 107 and 108, the crimp tube 12 is deformed around the wire 10 to grip it tightly.
  • the arrangement and spacing of the pivots 103, 104, 106 and 110 is such that a relatively large movement at the handles 107 and 108 is translated into a movement of very small magnitude at the forward jaw members 111 and 112. Consequently, since the torque applied by the surgeon through the handles 107 and 108 is transmitted through the tool 100 to the forward jaw members 111 and 112, the compressive force applied by the forward jaw members 111 and 112 to the crimp tube 12 is much greater than the force applied to the tool 100 by the surgeon. This assists the user -in forming a firm and reliable crimp.
  • the forward end surfaces of the forward jaw members 111 and 112 are substantially flat and extend generally transversely of the crimp tool 100 and parallel to the line of movement of the jaw members 111 and 112, so that the crimp tube 12 can be crimped using the tool as close to the bone as possible.
  • the crimping action produced by the jaws is such as to deform the crimp tube 12 about two different axes.
  • the 'upper' jaw 111 as seen in the drawings, is provided with a protrusion 121 which co-operates with a recess 122 formed in the 'lower' jaw 112 so that the cylindrical crimp tube 12 is deformed to a tube of generally crescent-shaped crossrsection.
  • the protrusion 121 and recess 122 vary transversely of the jaws 11 and 112 with the protrusion 121 extending furthest at the centre of the jaws 111 and the recess 122 being deepest midway across the jaw 112. Consequently, the crimping action also deforms the crimp tube 12 along its longitudinal axis. This double crimping action helps to ensure that the crimped joint is very secure and reliable.
  • Figures 4 and 5 show a modified crimp tool 400 which is capable of providing the surgeon with a visible indication that the required pressure has been applied.
  • the overall construction of the crimp tool 400 is broadly similar to that of the tool 100 shown in Figures 2 and 3 and so, for the sake of clarity, only those reference numerals necessary to identify the additional features shown in Figures 4 and 5 have been included in these drawings.
  • an adjustable stop 430 and an indicator mechanism 440.
  • the adjustable stop 430 projects from the surface of the handle 407 which faces handle 408 and engages, in use, a fixed stop 432 on handle 408 to limit movement of the handles 407 and 408 towards one another.
  • the degree to which the adjustable stop 430 projects from handle 407 can be varied to change the extent to which the handles 407 and 408 can be moved together and, hence, to limit the compression of the crimp tube 12 by the jaws 411 and 412. This helps to avoid any chance of the crimp tube 12 being broken or split due to extreme pressure inadvertently being applied by the user.
  • the crimp tool 400 includes an indicator mechanism 440 consisting of two projecting tabs 442 and 444 extending from the handles 407 and 408.
  • the tabs 442 and 440 are so positioned that, as the handles 407 and 408 are moved together, the tab 442 carried by handle 408 slidingly engages the tab 440 on handle 407 as shown in Figure 5a.
  • the tab 440 has marked on.it an indicator scale 446 (for the sake of clarity, only one graduation on the scale is shown * ) and, in order to ensure that the required pressure has been exerted on the crimp tube 12, the handles 407 and 408 are simply moved together until the end of the tab 442 is brought into alignment with the appropriate marking on the scale 446. This ensures that the correct pressure is applied and that the same pressure can be applied at each crimping operation.
  • a leaf spring assembly 448 is also mounted between the handles 407 and 408 so as to urge the handles apart. This arrangement ensures that positive action to close the jaws of the tool 400 around a crimp tube is required and that, if the surgeon relaxes his grip for any reason, the tool immediately releases the crimp tube.
  • the tool 600 rather than merely providing an indication that the correct pressure has been applied, is so constructed that the grip on the crimp tube cannot be released until the necessary pressure has been exerted.
  • the tool 600 is broadly similar to the tool 100 shown in Figures 2 and 3 and, for ease of reference, only those parts which differ from those of the tool 100 have been allocated reference numerals in these drawings.
  • the tool 600 shown in Figures 6 and 7 includes a ratchet mechanism 650 which prevents the handles 607 and 608 being moved apart until they have been closed to the degree necessary to apply the required pressure to the crimp tube.
  • the ratchet mechanism 650 has a female part 652 carried by handle 608 and a co-operating male part 652 carried by handle 607.
  • the female part 652 is a forked element having two tabs 656 extending parallel to one another and substantially parallel to the handle 607. Each tab 656 carried a single ratchet tooth 658 engageable with appropriately formed teeth on the male part 654 of the ratchet mechanism.
  • the male part 654 consists of a single toothed plate 660 which has a plurality of ratchet teeth 662 formed on it.
  • the toothed plate 660 of the male part 654 moves between the tabs 656 of the female part and the ratchet teeth 658 and 662 engage one another.
  • the tabs 656 are sufficiently resilient and the ratchet teeth 658 and 662 are so shaped that the teeth can move past one another as the handles 607 and 608 continue to move toward one another.
  • the shaping of the teeth 658 and 662 is such that, once they are engaged, the toothed plate 660 cannot be withdrawn from between the tabs 656.
  • the tool 600 can be set at partial pressure (sufficient to grip the crimp tube but not sufficient to form the final crimp) with the ratchet teeth engaged, allowing final adjustments to the wire loop to be made with the tool 600 in place. The final crimp can then be made subsequently by closing the tool.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Surgical Instruments (AREA)

Abstract

Un outil de sertissage, servant à déformer un tube de sertissage (10) autour de fils métalliques utilisés au cours d'interventions chirurgicales, comprend une paire de poignées relativement longues (107, 108) pivotant autour d'un axe de pivotement postérieur (106). Chaque poignée s'étend vers l'avant d'un axe de pivotement postérieur (106) pour former une partie de mâchoire postérieure (101a, 101b). Les poignées comprennent des surfaces de came coopérantes qui y sont ménagées de manière que, lorsque les poignées sont pivotées l'une vers l'autre, les extrémités libres des parties de mâchoires arrière s'écartent. Ces extrémités libres (101a, 101b) portent chacune un pivot intermédiaire (103, 104). Des parties de mâchoires antérieures (111, 112) peuvent pivoter autour du pivot intermédiaire (103, 104), autour d'un axe de pivotement avant commun (110). Les parties de mâchoires antérieures (11, 112) s'étendent vers l'avant par rapport à l'axe de pivotement avant (110) de façon que leurs extrémités avant puissent entrer en contact avec le tube de sertissage pour le déformer. La longueur des poignées (107, 108) est sensiblement supérieure à celle des parties de mâchoires postérieures (101a, 101b) et la longueur des parties de mâchoires antérieures (111, 112) est sensiblement supérieure à celle de leurs extrémités avant. En conséquence, la force de compression appliquée par les extrémités avant des parties de mâchoires antérieures est sensiblement supérieure à la force de compression appliquée par un utilisateur sur les poignées (107, 108).
EP93903251A 1992-02-07 1993-02-08 Dispositif de sertissage Withdrawn EP0625085A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB929202635A GB9202635D0 (en) 1992-02-07 1992-02-07 Device for tightening a loop in a wire or cable
GB9202635 1992-02-07
GB929212150A GB9212150D0 (en) 1992-06-09 1992-06-09 Crimper
GB9212150 1992-06-09
PCT/GB1993/000262 WO1993015880A2 (fr) 1992-02-07 1993-02-08 Dispositif de sertissage

Publications (1)

Publication Number Publication Date
EP0625085A1 true EP0625085A1 (fr) 1994-11-23

Family

ID=26300289

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93903251A Withdrawn EP0625085A1 (fr) 1992-02-07 1993-02-08 Dispositif de sertissage

Country Status (3)

Country Link
EP (1) EP0625085A1 (fr)
JP (1) JPH07503907A (fr)
WO (1) WO1993015880A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5545168A (en) * 1994-03-11 1996-08-13 Burke; Dennis W. Apparatus for both tensioning and crimping a surgical wire
FR2723529B1 (fr) * 1994-08-09 1996-10-25 Rech Ligamentaire Scrl Soc Civ Procede de fixation par sertissage d'un lien prothetique et pince permettant de realiser ce sertissage
DE29602240U1 (de) * 1996-02-09 1997-06-19 Novopress GmbH Pressen und Presswerkzeuge & Co KG, 41460 Neuss Preßgerät
CN101426443B (zh) * 2006-04-21 2011-11-23 新特斯有限责任公司 整形手术中使用的长尖嘴夹压钳
JP6005765B2 (ja) * 2013-01-31 2016-10-12 株式会社シンテック かしめ工具
JP6153782B2 (ja) * 2013-06-25 2017-06-28 日野自動車株式会社 カシメ工具

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR444847A (fr) * 1911-08-18 1912-10-26 Antal Fodor Pince nouvelle
BE888258A (nl) * 1981-04-03 1981-07-31 Peever N V Tang voor het op een dier vasthechten van een identifikatiemerk.
US4462403A (en) * 1983-01-21 1984-07-31 Vernitron Corporation Single action forceps for bone surgery
DE3319149C1 (de) * 1983-05-26 1984-12-13 Franz 7202 Mühlheim Leibinger Anordnung zur gegenseitigen Lagefixierung von Knochenteilen und Werkzeug zum Befestigen dieser Anordnung
US4966600A (en) * 1989-01-26 1990-10-30 Songer Robert J Surgical securance method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9315880A3 *

Also Published As

Publication number Publication date
WO1993015880A2 (fr) 1993-08-19
WO1993015880A3 (fr) 1993-11-25
JPH07503907A (ja) 1995-04-27

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