EP0054007A1 - Outil pour le serrage et le desserrage de grands profils de filetage comme tubes ou analogues - Google Patents

Outil pour le serrage et le desserrage de grands profils de filetage comme tubes ou analogues Download PDF

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Publication number
EP0054007A1
EP0054007A1 EP81830192A EP81830192A EP0054007A1 EP 0054007 A1 EP0054007 A1 EP 0054007A1 EP 81830192 A EP81830192 A EP 81830192A EP 81830192 A EP81830192 A EP 81830192A EP 0054007 A1 EP0054007 A1 EP 0054007A1
Authority
EP
European Patent Office
Prior art keywords
cylindrical body
chain
pin
tool
cylindrical
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Withdrawn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
EP81830192A
Other languages
German (de)
English (en)
Inventor
Gino Passera
Bruno Sandei
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.)
Elettromeccanica Industriale Emi Di Sandei Bruno & C Sdf
Original Assignee
Elettromeccanica Industriale Emi Di Sandei Bruno & C Sdf
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 Elettromeccanica Industriale Emi Di Sandei Bruno & C Sdf filed Critical Elettromeccanica Industriale Emi Di Sandei Bruno & C Sdf
Publication of EP0054007A1 publication Critical patent/EP0054007A1/fr
Withdrawn legal-status Critical Current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
    • B25B13/48—Spanners; Wrenches for special purposes
    • B25B13/50—Spanners; Wrenches for special purposes for operating on work of special profile, e.g. pipes
    • B25B13/52—Chain or strap wrenches

Definitions

  • the invention described herein is a tool for tightening and slackening threaded parts, -especially those having larger dimensions such as tubes, pipes etc.
  • One object of the invention herein is that of providing a tool for tightening or slackening large threaded parts which enables working on components out of easy reach or awkward to lay hold on.
  • a further object of the invention is that of providing a simple, inexpensive and compact tool.
  • a further object of the invention is that of creating a tool which may be used in conjunction with others normally untilised by fitters/maintenance men.
  • the tool described herein which is characterised by the fact that it comprises: a cylindrical body provided with a shank which, paired with a conventional wrench/spanner of the appropriate size, allows for rotation of the cylindrical body around its own axis, to which the extremity of a chain is permanently attached in such a way that the axis of rotation relative to each link thereof lies parallel with the. said cylindrical body's axis; locking means designed for making the said chain fast to the said cylindrical body by any one of the individual links thereof.
  • the tool described herein comprises a cylindrical body 1 provided with a shank 2;
  • the shank 2 may be any one of a variety of types viz.-prismatic with square./ hexagonal cross-section, or splined or similar, and, paired with a conventional spanner/wrench of correct size -which needless to say must be of corresponding cross-section to the shank- furnishes the means for causing the cylindrical body 1 to rotate around its own axis.
  • the wrench in question clearly could be a box-spanner, socket wrench or any other kind.
  • the lateral surface of the cylindrical body is given axially-disposed knurling, for reasons which will become apparent hereafter.
  • the cylindrical body 1 comprises a cylindrical mid-section 5 of a lesser diameter than that of the body 1 as a whole, being defined by an annular recess 6 located in the cylindrical body 1 itself.
  • One extremity of a chain 3 is permanently attached to the cylindrical body 1 and disposed in such a way that the axis of rotation of each link thereof lies parallel with the cylindrical body 1 axis; provision is made for attachment of the chain extremity to the cylindrical body by means of a first pin 7 threaded through the end-link of the " said chain itself and fixed permanently to the cylindrical body; a second pin 8 fixed likewise to the cylindrical body 1 holds the end-link afore-mentioned hard against the cylindrical mid-section 5.
  • Pins 7 & 8 are disposed internally of annular recess 6 with axes parallel to that of cylindrical body 1; the extremities of pins 7 & 8 being bedded into the flank- walls of annular recess 6.
  • the tool described herein further comprises locking means designed for locking the chain 3 to the cylindrical body 1 by any one of its several links.
  • the locking means comprises a third pin 9 which may be inserted into or withdrawn from cylindrical body 1; to this end there is a hole 12 located in the lower section of the cylindrical body 1 which admits the introduction of the said third pin 9.
  • the extremity of the pin 9 is threaded in order to be screwed into a further, second hole 13 located in the upper section of the cylindrical body 1.
  • pin 9 is disposed with axis parallel to that of cylindrical body 1, being likewise positioned internally of annular recess 6; said pin 9 is disposed all but diametrically opposite to second pin 8.
  • Chain 3 having one extremity permanently fixed to cylindrical body 1 and one extremity free, is wrapped around the part or component to be tightened or slackened, for instance around a tube 10 as illustrated in Figs 2 & 3; chain 3 is then fastened to cylindrical body 1-in such a way as to maintain contact -to all intents and purposes- between cylindrical body and part/component; to this end one of the chain links is introduced into annular recess 6, whereupon pin 9 is inserted into holes 12 & 13 in such a way that the chain link introduced into annular recess 6 is lodged between pin 9 itself and cylindrical mid-section 5. In this manner pin 9 holds said chain link fast against cylindrical mid-section 5 thereby fastening chain 3 itself to cylindrical body 1.
  • the special shape of the tool described thus allows its being used for tightening or slackening threaded parts or components in the most inaccessible of locations; in fact, dimensions of the tool are such that , being small, the tool may be applied to the workpiece in practically any position whatever, a fact which makes for ease of access with a wrench or spanner to the shank 2.
  • the shank may be male or female to accommodate whatever kind of wrench, spanner or extension bar etc.- without straying from within the bounds of protection afforded to the basic concept as described above, and as claimed below.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP81830192A 1980-12-05 1981-10-12 Outil pour le serrage et le desserrage de grands profils de filetage comme tubes ou analogues Withdrawn EP0054007A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2906480U 1980-12-05
IT2906480U IT8029064V0 (it) 1980-12-05 1980-12-05 Utensile per l'avvitamento e lo svitamento in particolare di elementi di grandi dimensioni quali tubi ecc.

Publications (1)

Publication Number Publication Date
EP0054007A1 true EP0054007A1 (fr) 1982-06-16

Family

ID=11226064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81830192A Withdrawn EP0054007A1 (fr) 1980-12-05 1981-10-12 Outil pour le serrage et le desserrage de grands profils de filetage comme tubes ou analogues

Country Status (2)

Country Link
EP (1) EP0054007A1 (fr)
IT (1) IT8029064V0 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1456126A (en) * 1922-06-05 1923-05-22 George B Friday Cap wrench
US2825253A (en) * 1956-04-24 1958-03-04 Howard W Brenner Ratcheting chain wrench
US3314317A (en) * 1966-02-16 1967-04-18 James M Ashley Wrench
US3505914A (en) * 1967-10-24 1970-04-14 Virgil M Ockinga Chain wrench
US4138910A (en) * 1977-10-11 1979-02-13 Laird Jr Jonathan L Cleated chain wrench

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1456126A (en) * 1922-06-05 1923-05-22 George B Friday Cap wrench
US2825253A (en) * 1956-04-24 1958-03-04 Howard W Brenner Ratcheting chain wrench
US3314317A (en) * 1966-02-16 1967-04-18 James M Ashley Wrench
US3505914A (en) * 1967-10-24 1970-04-14 Virgil M Ockinga Chain wrench
US4138910A (en) * 1977-10-11 1979-02-13 Laird Jr Jonathan L Cleated chain wrench

Also Published As

Publication number Publication date
IT8029064V0 (it) 1980-12-05

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH DE FR GB SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19830521

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SANDEI, BRUNO

Inventor name: PASSERA, GINO