EP0771251B1 - A pair of pliers - Google Patents

A pair of pliers Download PDF

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Publication number
EP0771251B1
EP0771251B1 EP94930396A EP94930396A EP0771251B1 EP 0771251 B1 EP0771251 B1 EP 0771251B1 EP 94930396 A EP94930396 A EP 94930396A EP 94930396 A EP94930396 A EP 94930396A EP 0771251 B1 EP0771251 B1 EP 0771251B1
Authority
EP
European Patent Office
Prior art keywords
jaw
pliers
circlip
pair
axis
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 - Lifetime
Application number
EP94930396A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0771251A1 (en
Inventor
Conny Jansson
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.)
Kapman AB
Original Assignee
Sandvik AB
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 Sandvik AB filed Critical Sandvik AB
Publication of EP0771251A1 publication Critical patent/EP0771251A1/en
Application granted granted Critical
Publication of EP0771251B1 publication Critical patent/EP0771251B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B25B27/20—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 inserting or withdrawing split pins or circlips
    • B25B27/205—Pliers or tweezer type tools with tow actuated jaws

Definitions

  • the invention relates to a pair of pliers for mounting or dismounting circlips.
  • a circlip is used for axially locking a component to an axis or a pipe.
  • the ends of the circlip are enlargened and provided with holes to facilitate mounting by means of a circlip pliers.
  • the jaw tips of the pliers are entered into the holes.
  • a circlip for external positioning is mounted by separating the ends until the inner diameter of the circlip becomes large enough to enter the axis.
  • a circlip for internal positioning is mounted by reducing the gap between the ends until the outer diameter of the circlip becomes short of the diameter of the hole in the pipe thereby making insertion therein possible.
  • the dismounting process is reverse to the mounting process.
  • pliers are used for external and internal positioning.
  • True in both cases of pliers is that a circlip held by the pliers is charged with a large amount of elastic energy, such that it easily may fly away if one end slides off of one tip of the jaws. This can easily happen if the tips are smooth and conical.
  • conventional solutions rely on tips with waists or tips with splines increasing friction to prevent the circlip from sliding.
  • the circlip will in connection with the conventional pliers, be held to the jaws even when one has let go of the operating grip of the jaws. That may extend the time for mounting and may demand that both hands be used to put the circlip aside for temporary storing during disassemblying of a machine element.
  • a prior art tool shown in Fig. 4 have jaws with tips that each includes a symmetrically shaped waist 15.
  • the waist however prevents the circlip from sliding along both sides of the jaw and thus impedes the dismounting process.
  • a pair of pliers according to the preamble of claim 1 is known for instance from US-A-4539873.
  • the present invention aims to provide a pair of circlip pliers having tips of the jaws configured in a manner that mounting and dismounting of circlips are facilitated. This aim is achieved with the pair of pliers defined in claim 1.
  • a preferred embodiment of the pair of pliers according to the invention is defined in dependent claim 2.
  • Fig. 3 shows an enlarged illustration of the front portion of the pair of pliers of figures 1 and 2, wherein each jaw has been provided with a non-symmetrically placed waist 16.
  • the waist is arranged as an imaginary part of a turned or ground rotational surface having an axis 17 of symmetry different from the symmetry axis 18 of the jaw.
  • the side 12, 14 of the jaw along which the circlip is not supposed to slide along thereby achieves an undercut contour while the side 11, 13 of the jaw along which the circlip is supposed to slide along, remains smooth and is preferably partly conical with a conicity 19 steeper that that of the jaw.
  • the non-symmetrical waist may be described by a very large radius thereby approaching a substantially planar undercut.
  • Circlip pliers according to the present invention may be provided with conventional straight or bent jaws with or without a contra-acting spring.
  • a pair of pliers for mounting or dismountiong of circlips comprising two jaws, each having a first side 11, 13 arranged to be pressed against a hole of an end of the circlip during deformation of the circlip for mounting or dismounting purposes, said jaw having a second side 12, 14 pressing against said hole during release of the pliers.
  • the first side 11, 13 of each jaw which can touch the circlip is provided with a non-symmetrical waist 16 forming a part of a rotational surface having an axis 17 of symmetry spaced from the axis 18 of symmetry of the jaw. The distance is so large that no undercut arises at the contour of the second side 12, 14.
  • Each jaw is generally conical and the tip of the jaw is conical but with an included angle larger than the corresponding angle of the jaw.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Workshop Equipment, Work Benches, Supports, Or Storage Means (AREA)
EP94930396A 1993-10-15 1994-10-14 A pair of pliers Expired - Lifetime EP0771251B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9303394 1993-10-15
SE9303394A SE501844C2 (sv) 1993-10-15 1993-10-15 Spårringstång
PCT/SE1994/000969 WO1995010394A1 (en) 1993-10-15 1994-10-14 A pair of pliers

Publications (2)

Publication Number Publication Date
EP0771251A1 EP0771251A1 (en) 1997-05-07
EP0771251B1 true EP0771251B1 (en) 1998-12-23

Family

ID=20391437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94930396A Expired - Lifetime EP0771251B1 (en) 1993-10-15 1994-10-14 A pair of pliers

Country Status (5)

Country Link
EP (1) EP0771251B1 (enrdf_load_stackoverflow)
DE (1) DE69415558T2 (enrdf_load_stackoverflow)
SE (1) SE501844C2 (enrdf_load_stackoverflow)
TW (1) TW250455B (enrdf_load_stackoverflow)
WO (1) WO1995010394A1 (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1652623A3 (en) * 2004-10-28 2006-09-13 Herramientas Eurotools, S.A. Pins at the tips of a manual tool
ES2265242B1 (es) * 2004-10-28 2008-03-01 Herramientas Eurotools, S.A. Espiga de punta de herramientas manuales.
TWI386287B (en) * 2010-12-17 2013-02-21 Circlip pliers
DE102016101926A1 (de) * 2016-02-04 2017-08-10 Knipex-Werk C. Gustav Putsch Kg Zange mit zwei Zangenschenkeln
JP7092457B2 (ja) * 2016-09-15 2022-06-28 株式会社明電舎 回路基板構造及び基板保持部材
CN106695682A (zh) * 2017-02-14 2017-05-24 哈尔滨东安发动机（集团）有限公司 一种轴用挡圈卡钳
US11172841B2 (en) * 2017-06-21 2021-11-16 Alandra Medical SAPI DE CV Electrode catheter assembly and method for the manufacture thereof
TWI838248B (zh) * 2023-05-11 2024-04-01 穩陞工業股份有限公司 扣環鉗結構

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE675756C (de) * 1936-11-11 1939-05-16 Bosch Gmbh Robert Aufweitezange
US4539873A (en) * 1983-11-30 1985-09-10 Freed Melvyn N Pryer-plier tool
DE3531847A1 (de) * 1985-09-06 1987-03-19 Seeger Orbis Gmbh Spannzange fuer sicherungsringe
SE449577B (sv) * 1986-06-06 1987-05-11 Devex Ab Omstellbar monteringstang

Also Published As

Publication number Publication date
DE69415558D1 (de) 1999-02-04
SE9303394D0 (sv) 1993-10-15
DE69415558T2 (de) 1999-05-12
EP0771251A1 (en) 1997-05-07
SE501844C2 (sv) 1995-06-06
WO1995010394A1 (en) 1995-04-20
SE9303394L (sv) 1995-04-16
TW250455B (enrdf_load_stackoverflow) 1995-07-01

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