FR2628019A1 - INSULATING RATCHET KEY - Google Patents

Abstract

Insulating ratchet wrench, comprising a body 1, a rotor 3, one end of which is engaged in the body 1, a cap 8 covering the body, a partial rotor covering element such as a socket 7, and an electrical insulator 9, 12 covering these different parts, characterized in that it comprises an insulating ring 15 surrounding the part 3 of the rotor 3 left free by said element 7 and which is provided with an end collar 16 fixed to the insulating coating 9 of the body 1, and a slight play is reserved between this ring 15 and the rotor 3. The insulating ring 15 is manufactured with a very precise external dimension which always remains the same, which allows it to meet the new standards for electrical insulation of such a tool. .

Description

(I) FRENCH REPUBLIC Publication no .: 2,628,019 (to be used only

  for NATIONAL INSTITUTE reproduction orders)

NATIONAL INSTITUTE

  INDUSTRIAL PROPERTY, i INDUSTRIAL PROPERTY National registration number 88 02720 PARIS

Int CI4: B 25 B 13/46.

  A1 PATENT APPLICATION

  (Date of filing: March 3, 1988. (Applicant (s): Company known as: ATELIERS SIBILLE ET

CIE.- FR.

  () Priority (Inventor (s) Da; = of the public availability of the

  application: BOPI "Patents" n 36 of September 8, 1989.

  6 References to other national documents appearing

rented: (r Holder (s)

_ Agent (s): Cabinet Lavoix.

3 Insulating ratchet wrench.

  Insulating ratchet wrench, comprising a body 1, a rotor 3, one end of which is engaged in the body 1, a cap 8 covering the body, an element for partially covering the rotor xi / i such as a socket 7, and an insulator electric 9, 12 covering these different parts, characterized in that it includes a 9 '

  insulating ring 15 surrounding the part 3a of the rotor 3 left 1-

  free by said element 7 and which is provided with an end flange 16 fixed to the insulating coating 9 of the body 1, and there is a slight clearance 9 m between this ring 15 and the rotor 3. The insulating ring 15 is manufactured with a exterior dimension very 12 L z precise and which always remains the same, which allows it to meet the new standards for electrical insulation of such a tool x 5. O 1M on ND Sale of booklets to 'IMPRIMERIE NATIONALE, 27, rue deConvention75732 PARIS CEDEX 15 DL Ovente booklets to' IMPRIMERIE NATIONALE, 27, rue de le Convention - 75732 PARIS CEDEX 15 The subject of the present invention is a ratchet wrench insulator, of the type comprising a body, a rotor of which one end is engaged in the body, a cap covering the body, a partial covering element of the rotor such as a sleeve, and an insulator

  electric covering these different parts.

  In a key like this, electrical isolation

  up to now has been ensured by mutual covering of the end parts of the body insulation and of the insulation of the rotor sleeve, the body insulation comprising for this purpose an annular lip which covers the end of the insulator of the socket. However, 'experience shows that such a key is insufficient to meet the requirements of the standard

  NF C 18400, according to which no current must pass through

  pour an insulating tool immersed in a bath of beads

  steel and receiving for several minutes a

  10 kV electric rant. Indeed, it turns out that

  isolation at the terminal lip of the coating

  insulation of the body and the end of the insulation

  of the socket is insufficient to prevent the passage

current age.

  To solve this problem, it has already been proposed to completely fill the rotor with an insulator.

  in solidarity with it and which therefore rotates with it.

  But it can be seen that in use the ineffective friction

  livable thus generated lead to rapid wear of the insulation, which then no longer fulfills its function and

must be replaced quickly.

  The object of the invention is to produce a ratchet wrench whose insulation meets the above standard

  while having a long lifespan by almost ab-

friction friction.

  According to the invention, the ratchet wrench

  carries an insulating ring surrounding the part of the rotor left free by said covering element and which is provided with an end flange fixed to the insulating coating of the body, and a slight clearance is

  reserved between this ring and the rotor.

  The ring is advantageously manufactured by a process allowing its outer dimension to be adjusted very precisely, that is to say to a fraction of a millimeter. So this insulating ring can be

  obtained by molding, bar turning or other process if-

  milaire. In addition, the existence of a slight play between

  this ring and the rotor avoid any general friction

  rator of premature wear of the insulation on the

rotor.

  Tests have shown that a ratchet wrench with this insulating ring meets the standard

NF above.

  Other features of the invention appear

  will appear during the description which follows,

  made with reference to the accompanying drawing which illustrates an embodiment thereof by way of nonlimiting example.

  Figure 1 is a mid-section view half

  elevation of an embodiment of the wrench

insulating pawl according to the invention.

  Figure 2 is a partial exploded perspective view of the key of Figure 1, showing

  in particular the insulating plastic ring.

  The insulating ratchet key shown in Figures 1 and 2 comprises a body 1 for manual gripping of the key, terminated by an annular part 2, a rotor 3 provided with a radial flange 4, and of which a first end 5 is received in the opening of the annular part 2. The opposite end 6 of the rotor 3 is engaged in a partial covering element of the rotor 3, namely a sleeve 7 in this example. A cap 8 covers the terminal part 2, and contains a known ratchet mechanism

per se, not shown.

  These various parts are covered with an electrical insulator, namely on the body 1 a coating 9 which ends under the annular part 2 by a circular lip 11 forming a sort of skirt coaxial with the axis XX of the rotor 2 and the cap. 8. An insulating layer 12 also covers the pain 7 and ends, at the level of the lip 11, with a ring 13

inside the latter.

  Hat 8 is coated with an iso- cap

  lante 14 which completes the isolation of the key.

  This is provided in accordance with the invention.

  tion of an insulating ring 15 of a suitable plastic material, surrounding the part 3a of the rotor 3 left o20 free by the covering element 7, that is to say the cylindrical part 3a of the rotor 3 comprised between its ends 5 and 6. The ring 15 is provided with a cup-shaped end collar 16 adapted to match the contour of the collar 4, and consisting of a portion 16a extending radially and of a terminal ring 16b extending in the axial direction. This flange 16a, 16b fits into a corresponding clearance in the insulating coating 9, to which it is fixed, substantially at the level of the circular lip 11, with a slight clearance, relative to

the surface of the rotor 3.

  In addition, an annular groove 17 is formed in the external surface of the ring 15, and this groove 17 receives a first annular bead 18 insulating and waterproof, forming part of the insulating layer 12,

  by forming an internal projection of the collar 13.

  In addition, the insulating cap 14 has an annular groove 19 receiving a second annular insulating bead 21 forming part of the iso-

  lant 9, from which it projects internally

  laughingly. The two cords 18 and 21 are applied in the respective grooves 15 and 19 so

waterproof.

  The insulation of the rotor 3 is therefore perfectly ensured by these cords 18, 21 and by the ring 15, which undergoes no wear due to the slight clearance reserved between the latter and the rotor 3. On the other hand, the manufacture of the ring 15 by one of the aforementioned processes gives it a very precise external dimension and which always remains stable, which allows the key to satisfy

to the insulation standard above.

Claims (3)

  1.Insulating ratchet wrench, comprising a body (1), a rotor (3) one end of which is engaged in the body (1), a cap (8) covering the body, an element for partially covering the rotor such as a   socket (7), and an electrical insulator (9,12) covered   vrant these different parts, characterized in that it comprises an insulating ring (15) surrounding the part (3a) of the rotor (3) left free by said element (7), and which is provided with a terminal flange (16 ) attached to the insulating coating (9) of the body (1), and a slight clearance is reserved between this ring (15) and the rotor (3).   2. Key according to claim 1, charac-   t5 terized in that the ring (15) has an annular groove (17) in which is received a first annular bead (18) insulating and waterproof making   part of the insulation (12,13) of the covering element vement (7) of the rotor (3).   3. Key according to claim 2, charac-   terized in that the cap (8) is coated with an insulating cap (6) in which is formed an annular groove (19) sealingly receiving a second annular insulating bead (21) forming part of the insulator (9) of the body (1).   O 'co ("o c"' ú \ X L'DiA ::! -Z VOHV- kl 6 / 'q 1l 8 L -..... 6, ' 6 / Ix-   go that way. Z '91i 99JL N m s 9 9.Lt fi ú z zt Erratum Patent no A1 Patent application no 88 02720 Publication no: 2,628,019 International classification CLASST 4 B25B 13/46; E R A T U M   In section 72 of the cover page of the booklet of the request for   patent, the name of the inventor has been omitted. I1 fauz to read: GEAY Michel.   xi Erratum Patent no A1 Patent application no 88 02720 Publication No: 2 628 019 International classification: CLASST 4 B25B 13/46; E.ERRATUM   In section 72 of the cover page of the booklet of the request for   patent, the name of the inventor has been omitted. You should read: GEAY Michel.