EP0508850A1 - Reduzierzange für Rohre und dergleichen - Google Patents

Reduzierzange für Rohre und dergleichen Download PDF

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Publication number
EP0508850A1
EP0508850A1 EP92400784A EP92400784A EP0508850A1 EP 0508850 A1 EP0508850 A1 EP 0508850A1 EP 92400784 A EP92400784 A EP 92400784A EP 92400784 A EP92400784 A EP 92400784A EP 0508850 A1 EP0508850 A1 EP 0508850A1
Authority
EP
European Patent Office
Prior art keywords
arm
axis
blades
notch
pliers
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.)
Granted
Application number
EP92400784A
Other languages
English (en)
French (fr)
Other versions
EP0508850B1 (de
Inventor
Roger Malagnoux
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.)
Pierre Grehal et Cie SA
Original Assignee
Pierre Grehal et Cie SA
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 Pierre Grehal et Cie SA filed Critical Pierre Grehal et Cie SA
Publication of EP0508850A1 publication Critical patent/EP0508850A1/de
Application granted granted Critical
Publication of EP0508850B1 publication Critical patent/EP0508850B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/04—Reducing; Closing

Definitions

  • the present invention relates to a new clamping pliers for shaping the end of a pipe to be engaged inside another pipe initially of the same diameter.
  • the shaping for the constriction of a pipe end is an operation which must be carried out frequently on site during the assembly of the pipe elements for the transport and distribution of air or other gases, in particular in air conditioning installations.
  • constriction is carried out over a significant length, for example of the order of 5 cm.
  • the force to be applied to shrink the metal by waving it depends on several factors, in particular the hardness of the metal, its thickness and of course the length over which the shrinkage must be carried out. In all cases, the effort to apply is important.
  • the invention creates a hand clamp which makes it possible to achieve this constriction by exerting on the handles a force proportionally low compared to that which is applied by the clamp, that is to say that it allows to work with a high leverage ratio, while making it possible for the necking to be carried out over a significant length.
  • the constriction pliers for pipes and the like is characterized by a first arm having, in section, the shape of a U and forming a spout in which a notch delimiting edges forming blades is produced, said first arm being articulated to a second arm by an axis disposed near the end of the spout, said second arm delimiting ramps for actuating at least one blade articulated on an axis of the first arm, this axis being disposed beyond the notch
  • Fig. 1 is a perspective of two sections of pipe, one of which is constricted to allow its engagement in the other.
  • Fig. 2 is a side elevation of the necking pliers according to the invention.
  • Fig. 3 is a top view along line III-III of FIG. 2.
  • Fig. 4 is an end view seen along line IV-IV of FIG. 2.
  • Fig. 5 is a section seen along line V-V of FIG. 3.
  • Fig. 6 is an elevation similar to FIG. 2 showing the clamp in the open position.
  • Fig. 1 shows two sections of pipe 1 and 2 to be engaged one inside the other. Originally, the two sections are of the same diameter and one of them, the section 2, is constricted at its end 2a by the formation of corrugations reducing its outside diameter to cause it to coincide with the inside diameter of the section 1.
  • the clamp has two arms 3, 4 constituted by fittings bent in U of different widths so that one of the arms can be engaged in the other by interlocking at least at their end at which said two arms are articulated around an axis 5.
  • One of the arms that designated by 3 in the drawing, is provided with an axis 6 for a spring 7 of the pin type which tends to keep said arms separated from one another as illustrated in FIG. 6 by rotating them around axis 5.
  • the arms 3, 4 form or are provided with handles 8, 9, preferably in flexible material, and with a clip 10 for joining them when the clamp is unused as shown in FIG. 2.
  • the arm 3 forms, at its front end, in each of its sides 3a, 3b, a spout 11 in which is formed a notch 12 whose edges 13, 13a substantially form a triangle whose apex 14 defines an acute angle.
  • the upper edge 13 of the notch 12 is bevelled to delimit two blades, which is shown by fig. 4 and 6.
  • the notch 12 has a depth of the order of 5 cm.
  • the arm 3 carries, beyond the top 14 of the notch 12, an axis 15 for the articulation of blades 16 which, in the example shown, are three in number and which are kept suitably spaced from each other by spacer washers 17 carried by the axle 15 as well as by spacer washers 18 carried by an axle 19 which constitutes a second connecting element for the blades 16.
  • the thickness of the spacer washers 17 and 18 is chosen so that the blades 16 are equidistant from each other, as shown in FIG. 4, and so that the sides 3a, 3b forming the blades 13 can be inserted between the blades 16, which is also shown in FIG. 4.
  • the arm 4 defines, opposite the axis 19, ramps 20 in each of its two sides against which the axis 19 is supported since the spring 7 tends to pivot the arm 3 for which the axis 19 is applied against said ramps 20.
  • the upper edge of the blades 16 is thinned to form counterblades 16a arranged opposite the edges 13 forming the blades but offset as illustrated in FIG. 4.
  • the clamp is engaged in the pipe by its notch 12 while the arms 3, 4 are spaced apart as illustrated in FIG. 6.
  • the ramp 20 acts like a cam on the axis 19, so that the blades 16 pivot around the axis 15, their edges 16a being brought closer to the edge 13 on the sides 3a, 3b of the arm 3.
  • the clamp has three counterblades.
  • a simplified model could have only one counter blade which would be the middle counter blade 16 appearing in FIG. 4. In this case, a single ripple would only be formed.

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)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
EP92400784A 1991-03-28 1992-03-23 Reduzierzange für Rohre und dergleichen Expired - Lifetime EP0508850B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9103767 1991-03-28
FR9103767A FR2674461B1 (fr) 1991-03-28 1991-03-28 Pince a retreindre pour tuyaux et analogues.

Publications (2)

Publication Number Publication Date
EP0508850A1 true EP0508850A1 (de) 1992-10-14
EP0508850B1 EP0508850B1 (de) 1994-09-28

Family

ID=9411213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92400784A Expired - Lifetime EP0508850B1 (de) 1991-03-28 1992-03-23 Reduzierzange für Rohre und dergleichen

Country Status (6)

Country Link
US (1) US5263355A (de)
EP (1) EP0508850B1 (de)
AT (1) ATE112193T1 (de)
DE (2) DE9105353U1 (de)
ES (1) ES2060456T3 (de)
FR (1) FR2674461B1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5794483A (en) * 1996-09-25 1998-08-18 Robinson Fin Machines, Inc. Angled blade tooling for a fin machine
US6164107A (en) * 1996-12-12 2000-12-26 Korba, Jr.; William Radius crimping tool
US5768935A (en) * 1997-03-13 1998-06-23 Owens; Carl H. Blade crimping device
US8333729B2 (en) * 2009-04-07 2012-12-18 Polybiotics Llc Multi-dose delivery system
US8495902B2 (en) * 2010-11-30 2013-07-30 Mwi Veterinary Supply Co. Crimping device
CN104139120A (zh) * 2014-07-01 2014-11-12 广东志高空调有限公司 一种采用可燃制冷剂空调的冲注工艺管封口方法
US11794232B1 (en) 2017-05-11 2023-10-24 Simpson Strong-Tie Company Inc. Tool for curving structural framing components

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH370903A (de) * 1959-06-26 1963-07-31 Schoop Traugott Verfahren zur Herstellung von Dachablaufrohren aus gefalztem zylindrischem Blechrohr, darnach hergestelltes Dachablaufrohr und Einziehapparat zur Durchführung des Verfahrens
AU3304171A (en) * 1971-09-02 1973-03-08 Herbert Conn Rex Hand crimper
DE2602491A1 (de) * 1975-03-25 1976-10-14 Pressmaster Ag Anordnung mit veraenderlichem kraftuebertragungsverhaeltnis, insbesondere bei einem zangen- oder scherenartigen werkzeug

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE601234C (de) * 1934-08-10 Siemens Schuckertwerke Akt Ges Pressgesenk zum Herstellen von Wellblechwaenden aus Blechtafeln
DE50444C (de) * L. SCHÜLER und und HCH. JETTER in Goeppingen Selbstthätige Maschine zur Herstellung von gewelltem Draht
US273382A (en) * 1883-03-06 Crimping-tongs
US354657A (en) * 1886-12-21 C rim ping-tool
US704217A (en) * 1902-03-12 1902-07-08 Leon Sarr Jar-cover-repairing tool.
GB190907116A (en) * 1908-05-14 1909-06-10 Charles Hiller Improvements in Pliers.
US1066804A (en) * 1910-08-27 1913-07-08 John L Falk Crimping-pliers.
FR513815A (fr) * 1919-04-04 1921-02-24 Leopold Bernard Et Cie Pince à plomber
US1809168A (en) * 1928-12-18 1931-06-09 Junkers Hugo Tool for upsetting or stretching sheet metal
US2861491A (en) * 1956-02-08 1958-11-25 Kelsey Hayes Co Ratchet and cam actuated tool
US3028628A (en) * 1960-06-24 1962-04-10 Darel A Rutherford Vinyl base bender
FR2398580A1 (fr) * 1977-07-28 1979-02-23 Lieutaud Et Cie Ets Pince a plomber
DE3234898C2 (de) * 1982-09-21 1985-02-28 C.A. Weidmüller GmbH & Co, 4930 Detmold Zangenartiges Presswerkzeug
DE3638083C2 (de) * 1986-11-07 1994-04-07 Siemens Ag Biegestanze

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH370903A (de) * 1959-06-26 1963-07-31 Schoop Traugott Verfahren zur Herstellung von Dachablaufrohren aus gefalztem zylindrischem Blechrohr, darnach hergestelltes Dachablaufrohr und Einziehapparat zur Durchführung des Verfahrens
AU3304171A (en) * 1971-09-02 1973-03-08 Herbert Conn Rex Hand crimper
DE2602491A1 (de) * 1975-03-25 1976-10-14 Pressmaster Ag Anordnung mit veraenderlichem kraftuebertragungsverhaeltnis, insbesondere bei einem zangen- oder scherenartigen werkzeug

Also Published As

Publication number Publication date
DE69200456D1 (de) 1994-11-03
ATE112193T1 (de) 1994-10-15
EP0508850B1 (de) 1994-09-28
FR2674461A1 (fr) 1992-10-02
DE9105353U1 (de) 1991-06-20
FR2674461B1 (fr) 1993-06-11
US5263355A (en) 1993-11-23
ES2060456T3 (es) 1994-11-16
DE69200456T2 (de) 1995-01-26

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