EP0180831B1 - Pince à tuyaux - Google Patents

Pince à tuyaux Download PDF

Info

Publication number
EP0180831B1
EP0180831B1 EP85113244A EP85113244A EP0180831B1 EP 0180831 B1 EP0180831 B1 EP 0180831B1 EP 85113244 A EP85113244 A EP 85113244A EP 85113244 A EP85113244 A EP 85113244A EP 0180831 B1 EP0180831 B1 EP 0180831B1
Authority
EP
European Patent Office
Prior art keywords
driving gear
handle
pipe wrench
arms
respect
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
Application number
EP85113244A
Other languages
German (de)
English (en)
Other versions
EP0180831A1 (fr
Inventor
Chao-Yang Chen
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Priority to AT85113244T priority Critical patent/ATE43086T1/de
Publication of EP0180831A1 publication Critical patent/EP0180831A1/fr
Application granted granted Critical
Publication of EP0180831B1 publication Critical patent/EP0180831B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • B25B13/00—Spanners; Wrenches
    • B25B13/10—Spanners; Wrenches with adjustable jaws
    • B25B13/12—Spanners; Wrenches with adjustable jaws the jaws being slidable
    • B25B13/14—Spanners; Wrenches with adjustable jaws the jaws being slidable by rack and pinion, worm or gear

Definitions

  • the invention relates to an adjustable pipe wrench, which has increased strength and increased resilience.
  • an adjustable pipe wrench which has increased strength and increased resilience.
  • it had been shown in use for heavy work that most of these known pipe wrenches are too weak to exert considerable attacking or turning forces. With strong elasticity there is a risk that the locking member, the drive shaft and / or the clamping head break easily.
  • the invention relates to a pipe wrench with a handle with two parallel, spaced arms, each arm has a hole and both holes are aligned with each other; with a body rotatably held with respect to the two arms, on which a first jaw is fixedly attached, a guide being formed inside the body, into which a toothed rack is slidably inserted, which carries a second jaw; with a rotatably arranged drive part which meshes with the toothed rack and with at least one locking device which optionally prevents rotation between the drive part and the handle.
  • a pipe wrench of this type is known from document FR-A-398 733.
  • the drive part and the body with the fixed jaw are rotatably held independently of one another by an axis.
  • the bearing part of the body is relatively weak and has a considerable opening which is open to the outside in order to make room for the rotatable arrangement of the drive part.
  • the rotatable arrangement of body and drive part around a common axis limits the extent of the pivoting of the two jaws.
  • a second axis is required to hold a locking member, the arrangement of which also affects the adjustability of the rack with the movable jaw.
  • a ratchet mechanism in which an adjustable pawl with a toothed locking surface engages in an internal toothed ring fixedly connected to a handle in order to selectively rotate a square in one direction or the other with respect to the handle to enable.
  • This document is not related to a pipe wrench.
  • the object of the present invention is to eliminate the deficiencies of the pipe wrench known from document FR-A-398 733 and to create a pipe wrench of this type which, in particular, thanks to a new design of the bearing of the body guiding the rack, is simpler Construction has a larger range of pivoting of the jaws and a higher load capacity without restricting the simple and easy to use.
  • the solution to this problem according to the invention is characterized in that a bore is formed within the body which communicates with the guide and which is aligned with the two openings in the two arms; the drive member is housed within a chamber formed by the bore and the two openings; and there are two locking devices, each designed as a ratchet mechanism, each hole being delimited by an inner ring gear and two pawls inserted into the drive part, which are designed so as to be able to engage in the inner ring gear in order to rotate the drive part in a direction of rotation with respect to the To prevent the handle.
  • the drive member is not only part of the locking device, but also serves as a bearing for the body guiding the rack.
  • the drive member and the bore adapted to it in the body can be designed with a comparatively large diameter, as a result of which a higher load capacity is obtained.
  • the range of the swiveling of the jaw tongs and thus the usability of the pipe wrench is expanded because the axes required for the known pipe wrench for the rotatable mounting of the body and the locking member are no longer required.
  • a slot is cut out in the axial direction within the drive part over its entire length.
  • Such a slot facilitates the insertion of the drive part into the bore on the body, in the guide of which the rack is already inserted.
  • the drive part meshes with the rack guided in the body and at the same time serves as an axis about which the body is rotatably mounted.
  • each pawl can advantageously have two locking surfaces, an additional actuator being provided, the actuation of which brings one or the other locking surface into engagement with the toothed rings in order to prevent rotation of the drive part in a direction of rotation with respect to the handle.
  • Different working methods of the pipe wrench can be set by simply adjusting the actuator.
  • the essential components of the pipe wrench shown in FIGS. 1 to 3 include a handle 70 with the arms 71 and 71 ', a body 30 which guides a rack 40, and a drive member 50.
  • a jaw 35 which is fixed with respect to the body 30 can are attached to the body 30 by means of a screw 36.
  • a with respect to the fixed jaw 35 jaw 42 is formed at the front end of a rack 40, which in turn is slidably held within a guide 31 in the body 30 so that the distance between the fixed jaw 35 and the movable jaw 42 can be adjusted.
  • In the wall of the body 30 there is a bore 32, which in turn is connected to the guide 31, so that the teeth 41 of the rack 40 protrude into the bore 32.
  • the handle 70 used to actuate the pipe wrench has two arms 71 and 71 'which are arranged parallel and at a distance from one another. On each arm 71, 71 'there is a hole 72, 72', the inner circumference of which is designed as a ring gear 721, 721 '.
  • the handle 70 is arranged to be pivotable with respect to the body 30, the two arms 71, 71 'being adjacent to the outer wall of the body 30, and the holes 72, 72' being axially aligned with the bore 32.
  • a drive part 50 has a length in the axial direction which essentially corresponds to the distance between the two arms 71, 71 'of the handle 70.
  • This drive part 50 is inserted in the axial direction into the bore 32 in the body 30.
  • a slot 56 extends over the entire length of the drive part 50.
  • the teeth 41 of the rack 40 mesh with the drive part 50 inserted into the body 30 because the teeth 41 protrude into the bore 32;
  • the drive member 50 meshes with the teeth 41 of the rack 40 so that when the rack 40 rotates together with the body 30 with respect to the handle 70 clockwise or counterclockwise, the opening formed between the movable jaw 42 and the fixed jaw 35 in its Width is changed in order to clamp workpieces with different dimensions.
  • a certain angle of rotation of the same components is given because the radius of curvature of the sector-shaped pinions 61, 61 'is greater than the radius of the holes 72, 72', so that only one side of the sector-shaped pinions 61, 61 'with the internal teeth of the adjacent ring gear 721 , 721 'combs while the other side of the pinion does not engage these teeth.
  • An actuator 63 serving as a selector or control lever is provided with a button 631 and fastened within an axial bore 51 of the drive part 50.
  • the spring actuated pins 65, 65' are pressed against the curved inner surface 613 of the sector-shaped pinions 61, 61 'so that these pinions 61, 61' are held in engagement with the ring gears 721, 721 '.
  • the operator can turn the knob 631 to the right or to the left, whereupon either the teeth 611 on the right side or the teeth 612 on the left side of the pinions 61, 61 'in Engage with the sprockets 721, 721 '.
  • rotation of the handle 70 clockwise with respect to the drive member 50 has the effect of attracting the movable jaw 42 and increasing the pressure on a workpiece located between the jaws 35, 42.
  • rotation of the handle 70 with respect to the body 30 is prevented.
  • cover plates 75 and 'washers 74 are provided which are fastened by means of a screw 76, which can be screwed into one end face of the body 30 (see FIG. 4). This also prevents lateral movement of the drive part 50 in the transverse direction.
  • An axial bore 632 is recessed in the shaft of the control lever 63, into which a screw 76 can be screwed in order to thereby hold the drive part 50 within the body 30.
  • the jaws 35, 42 are thereby moved towards or away from one another depending on the direction of rotation.
  • FIG. 3 illustrates a working position, the teeth 611 located on the right side of the sector-shaped pinions 61, 61 'being in engagement with the adjacent ring gear 721, 721' of the handle 70.
  • An object (not shown) is inserted into the opening formed between the two jaws 35 and 42.
  • the drive member 50 can also be turned clockwise, whereby the movable jaw 42 is displaced toward the fixed jaw 35 by displacement of the rack 40 until it hits the object. If the handle 70 is now further rotated in the clockwise direction with the application of the required torque, the object is firmly clamped and clamped between the fixed jaw 35 and the movable jaw 42.
  • the operator can turn the control lever 63 so that the teeth 612 arranged on the left side of the sector-shaped pinions 61, 61 'come into engagement with the adjacent ring gear 721, 721'.
  • the handle 70 is then secured with respect to a rotation counterclockwise to the body 30, so that the object can now be rotated counterclockwise by rotating the handle 70.
  • the spring-actuated pins 65, 65 ' are in two bores 57, 57', which are left to the central axis of the drive part 50; these spring-actuated pins 65, 65 'bring the teeth 612, 612' located on the left side of the sector-shaped pinions 61, 61 'into engagement with the inner teeth of the adjacent toothed rings 721, 721'. If there is resistance between the movable jaw 42 and the fixed jaw 35, for example when an object is gripped by these two jaws 35, 42, these sector-shaped pinions 61, 61 'prevent the body 30 from rotating clockwise.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Pens And Brushes (AREA)
  • Drilling Tools (AREA)
  • Surgical Instruments (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Supports For Pipes And Cables (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Valve Device For Special Equipments (AREA)
  • Processing Of Terminals (AREA)

Claims (3)

1. Clé serre-tubes comprenant
une poignée (70) à deux bras (71, 71') parallèles disposés à distance l'un de l'autre, chaque bras (71, 71') comportant un trou (72, 72') et les deux trous (72, 72') étant alignés l'un sur l'autre ;
une pièce (30) qui est montée tournante par rapport aux deux bras (71, 71') et sur laquelle est fixée une première mâchoire (35), une glissière (31), dans laquelle est montée coulissante une crémaillère (40) qui porte une seconde mâchoire (42), étant constituée à l'intérieur de la pièce (30) ;
une partie d'entraînement (50) montée tournante et engrenant dans la crémaillère (40) ; et
au moins un dispositif de blocage qui empêche éventuellement toute rotation entre la partie d'entraînement (50) et la poignée (70), caractérisée, en ce que à l'intérieur de la pièce (30) est réalisé un perçage (32) qui communique avec la glissière et qui est aligné avec les deux trous (72, 72') des deux bras (71, 71') ;
en ce que la partie d'entraînement (50) est logée dans une chambre formée par le perçage (32) et par les deux trous (72, 72') ; et
il est prévu deux-dispositifs de blocage constitués chacun en mécanisme à cliquet, chaque trou (72, 72') étant délimité par une couronne dentée intérieurement (721, 721') et dans la partie d'entraînement (50) sont montés deux cliquets d'arrêt (61, 61'), qui sont constitués de manière à pouvoir pénétrer dans les couronnes dentées intérieurement (721, 721') pour empêcher toute rotation dans un sens de la partie d'entraînement (50) par rapport à la poignée (70).
2. Clé serre-tubes suivant la revendication 1, caractérisée, en ce qu'une fente (56) est ménagée en direction axiale dans la partie d'entraînement (50) sur toute sa longueur.
3. Clé serre-tubes suivant la revendication 1 ou 2, caractérisée, en ce que chaque cliquet d'arrêt (61, 61') comporte deux surfaces de blocage (611, 612) ; et en ce qu'il est prévu un organe de réglage (63), dont la manoeuvre met l'une ou l'autre des surfaces de blocage (611, 612) en prise avec les couronnes dentées (721, 721') pour interdire toute rotation dans un sens de la partie d'entraînement (50) par rapport à la poignée (70).
EP85113244A 1984-11-02 1985-10-18 Pince à tuyaux Expired EP0180831B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85113244T ATE43086T1 (de) 1984-11-02 1985-10-18 Rohrzange.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US667538 1984-11-02
US06/667,538 US4561330A (en) 1984-11-02 1984-11-02 Pipe wrench

Publications (2)

Publication Number Publication Date
EP0180831A1 EP0180831A1 (fr) 1986-05-14
EP0180831B1 true EP0180831B1 (fr) 1989-05-17

Family

ID=24678620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113244A Expired EP0180831B1 (fr) 1984-11-02 1985-10-18 Pince à tuyaux

Country Status (9)

Country Link
US (1) US4561330A (fr)
EP (1) EP0180831B1 (fr)
AT (1) ATE43086T1 (fr)
AU (1) AU572770B2 (fr)
CA (1) CA1240539A (fr)
DE (2) DE8514675U1 (fr)
ES (1) ES296158Y (fr)
MX (1) MX161491A (fr)
NZ (1) NZ214030A (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4766785A (en) * 1986-09-29 1988-08-30 Chen Hsi P Pipe clamp
US4924735A (en) * 1989-02-28 1990-05-15 Lee Clark J Reversible pipe wrench
US4942790A (en) * 1989-09-26 1990-07-24 Wang Bor J Pipe wrench
US6675679B2 (en) * 2001-07-12 2004-01-13 Dj Technologies, Inc. Internal gripping pipe wrench
US6834569B2 (en) * 2002-08-12 2004-12-28 Ching-Shu Wang Crescent wrench
US7024972B2 (en) * 2003-05-27 2006-04-11 Wj Technologies, Inc. Tool for removing and tightening screw-on drains
US8464615B2 (en) * 2010-03-29 2013-06-18 National Oilwell Varco, L.P. Safety pipe wrench
US20160176025A1 (en) * 2014-12-18 2016-06-23 Troy Houston Pipe wrench having changeable engaging surface

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR398733A (fr) * 1909-01-23 1909-06-12 Born Geb Clef à écrous à ouverture réglable
US1023001A (en) * 1910-12-20 1912-04-09 Harry C Bennetch Wrench.
US1094221A (en) * 1913-08-09 1914-04-21 James H Kuhns Wrench.
US2765691A (en) * 1954-12-03 1956-10-09 Orville S Meredith Claw operated, slidable outer jaw wrench
US3171307A (en) * 1963-08-19 1965-03-02 Victor J Jamal Slidable-side jaw wrench
US4147076A (en) * 1977-10-31 1979-04-03 The Wright Tool And Forge Company Reversing-ratchet socket wrench
US4452108A (en) * 1978-09-05 1984-06-05 Lawrence Irwin F Ratcheting pipe wrench
CA1112913A (fr) * 1979-02-05 1981-11-24 John Penner Cle a rochet avec ejecteur de douille
US4261233A (en) * 1979-02-05 1981-04-14 Thorsen Tool Company Ratchet wrench of the socket drive type
AU538922B2 (en) * 1979-07-13 1984-08-30 Kalamazoo Inc. Technology Slidable jaw wrench
AU531402B2 (en) * 1979-11-08 1983-08-25 Irwin, L.F. Ratchet pipe wrench

Also Published As

Publication number Publication date
CA1240539A (fr) 1988-08-16
ES296158U (es) 1987-08-16
EP0180831A1 (fr) 1986-05-14
NZ214030A (en) 1987-03-31
MX161491A (es) 1990-10-10
DE3570199D1 (en) 1989-06-22
AU572770B2 (en) 1988-05-12
ATE43086T1 (de) 1989-06-15
US4561330A (en) 1985-12-31
DE8514675U1 (de) 1985-08-29
ES296158Y (es) 1988-03-16
AU4930985A (en) 1986-05-08

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