EP0077346A1 - Sogenannter drehmoment- oder dynamometrischer schlüssel mit automatischer ausschaltung, pseudo-auskupplung und wiederbekräftigung. - Google Patents

Sogenannter drehmoment- oder dynamometrischer schlüssel mit automatischer ausschaltung, pseudo-auskupplung und wiederbekräftigung.

Info

Publication number
EP0077346A1
EP0077346A1 EP19820901132 EP82901132A EP0077346A1 EP 0077346 A1 EP0077346 A1 EP 0077346A1 EP 19820901132 EP19820901132 EP 19820901132 EP 82901132 A EP82901132 A EP 82901132A EP 0077346 A1 EP0077346 A1 EP 0077346A1
Authority
EP
European Patent Office
Prior art keywords
handle
cam
spring
rocker arm
torque wrench
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
EP19820901132
Other languages
English (en)
French (fr)
Other versions
EP0077346B1 (de
Inventor
Flavien Nordet
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 AT82901132T priority Critical patent/ATE22672T1/de
Publication of EP0077346A1 publication Critical patent/EP0077346A1/de
Application granted granted Critical
Publication of EP0077346B1 publication Critical patent/EP0077346B1/de
Expired legal-status Critical Current

Links

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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/142—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
    • B25B23/1422—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters
    • B25B23/1427—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters by mechanical means

Definitions

  • the present invention relates to hand tools of the type "dynamometric wrenches" making it possible to provide bolting or screwing of mechanical assemblies to a recommended torque. This proceeds from the predetermined deformation of a spring. The amplitude of deformation of the spring, obtained with each stress, is constant. The torque variation effects are proportional to the length of spring subject to deformation after adjustment.
  • this body is pierced with a transverse lumen intended to receive the intermediate elements 11 for driving the screws and nuts. Adjoining this receptacle is fitted a hoop 9 which maintains the thickest end of the leaf spring 8 along the body 1, and the assembly is secured by a bolted axis.
  • the other end of the body receives a hollow pivoting handle 5 which partially fits in and envelops all the active elements of the key, cam 2 with its return spring, rocker arm 3 and damping block 4.
  • An adjusting screw (which can, if necessary, be made inviolable by existing means for carburetor jets for example) allows the tool to be recalibrated according to wear.
  • this reversible tool ensures both right tightening and left tightening. He is precise and faithful. Its construction is simple (reduced number of components and wide adjustment tolerances). His reduced head and slim body allow him the best access.
  • the leaf spring releases part of the accumulated force by pushing back the rocker arm through its point of contact with the roller, and its return effect is stopped at its free end by the block. damper.
  • the resulting shock constitutes the expected tactile and auditory signal.
  • the leaf spring supports a residual tension lower than the nominal torque displayed since its free length increased while its torsion decreased. Consequently, the body of the tool retains its angular position, while even carried away by its momentum, the operator's hand only accentuates the rotational movement of the handle.
  • This subsidiary effect is limited by the rise in tension of the leaf spring and, at the end of the stroke, by the contact of the safety stop with the body of the tool. It is during this period that the physiological reflex intervenes to interrupt the tightening action.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP19820901132 1981-04-27 1982-04-27 Sogenannter drehmoment- oder dynamometrischer schlüssel mit automatischer ausschaltung, pseudo-auskupplung und wiederbekräftigung Expired EP0077346B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82901132T ATE22672T1 (de) 1981-04-27 1982-04-27 Sogenannter drehmoment- oder dynamometrischer schluessel mit automatischer ausschaltung, pseudo- auskupplung und wiederbekraeftigung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8108506A FR2504436A1 (fr) 1981-04-27 1981-04-27 Cle dite a " couple ou dynamometrique, a declenchement, pseudo-debrayage, et rearmement automatique "
FR8108506 1981-04-27

Publications (2)

Publication Number Publication Date
EP0077346A1 true EP0077346A1 (de) 1983-04-27
EP0077346B1 EP0077346B1 (de) 1986-10-08

Family

ID=9257881

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820901132 Expired EP0077346B1 (de) 1981-04-27 1982-04-27 Sogenannter drehmoment- oder dynamometrischer schlüssel mit automatischer ausschaltung, pseudo-auskupplung und wiederbekräftigung

Country Status (4)

Country Link
EP (1) EP0077346B1 (de)
DE (1) DE3273614D1 (de)
FR (1) FR2504436A1 (de)
WO (1) WO1982003816A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2730943B1 (fr) * 1995-02-24 1997-05-23 Facom Cle dynamometrique a rearmement automatique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1234972A (fr) * 1958-10-17 1960-07-01 Clé dynamométrique
FR1510105A (fr) * 1966-12-06 1968-01-19 Forges Stephanoises Sa Des Déclencheur à réarmement automatique pour clé dynamométrique
US3847038A (en) * 1971-07-26 1974-11-12 Snap On Tools Corp Automatic release wrench of the preset type
FR2250308A7 (de) * 1973-07-05 1975-05-30 Wille Eduard

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8203816A1 *

Also Published As

Publication number Publication date
EP0077346B1 (de) 1986-10-08
FR2504436A1 (fr) 1982-10-29
FR2504436B1 (de) 1984-07-13
DE3273614D1 (en) 1986-11-13
WO1982003816A1 (fr) 1982-11-11

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