FR2839670A1 - Tool for removing shaft seals has a flat profile with angled head fitted with pulling hook and thrust bearing - Google Patents

Abstract

A tool for removing shaft seals without damage to either the seal or the fitting has a flat strip body with a hand grip at one end and with a shaped head angled at 160 deg. to the handle. The head has a trapezoidal shape with the tow short sides at right angles to the outer side. A hook is fitted at one end of the outer side and a round stub at the other end. The stub is fitted with a cylindrical bearing. The hook end is inserted into the hole in the shaft seal and tilted to lift the seal. The tool is rotated, with the thrust bearing running around the outside of the seal housing, to progressively lift the seal without damage.

Description

REGULAR AVAILABILITY.

  The present invention relates to a hand tool specially for

  tine has the extraction of retaining rings of seals.

  In certain maintenance or repair work on internal combustion engines of automobiles, as well as other machines provided with mechanisms, the interior areas of which are perfectly closed by known retaining rings, it is necessary to extract these behind have access to the interior of these closed areas and thus be able to carry out the necessary tasks of emptying, filling, checking levels

  et al., forming part of said work.

  0 Currently, it is sometimes difficult to remove a retaining ring, because the tools used by the user, due to the fact that they are not specially intended for this task, can often deteriorate said retaining ring or its environment. and cause accidents or

  hand injuries to said user.

  The tool according to the present invention eliminates these drawbacks by allowing the user to extract the retaining ring conveniently and efficiently, without damaging it or affecting the environment of the retaining ring. This ease, due to the characteristics of the tool, also entails safety for the user, a very important factor.

  in accordance with the regulations in force.

  The figures in the accompanying drawing will make it clear how the invention can be made. In these figures, identical references

designate similar elements.

  Figure 1 is an elevational view of a tool according to the pre

sense invention.

  Figure 2 is a side view of the tool of Figure 1.

  FIG. 3 is a partial view, similar to that of FIG. 1, of the front part of an alternative embodiment of the tool according to the invention, intended for the extraction of retaining rings of smaller diameter . Figure 4 is a view, in section and in plan, of the stop

  of support of the tool according to the invention.

  Figure 5 is a perspective view, from back to front, of

the tool of the invention.

  FIG. 6 is a perspective view, from the front towards the rear,

audit tool.

  Figures 7 and 8 show views, also in perspective, to said tool, which show its front part, front view (Figure 7) and view from behind.

  riere (Figure 8), in a position different from that of Figures 5 and 6.

  Figs, ures 9, 10 and 1 1 illustrate in perspective the implementation of the tool, respectively in a first position (Figure 9) for which the tool is disposed near the inner edge of the retaining ring, in an intermediate position for which said tool has been inserted behind this edge (FIG. 10) and in a position in which the tool lifts

  the retaining ring (figure 11) to extract it.

  The manual tool for extracting retaining rings, in accordance with the invention and shown in the figures, comprises a metal body 1, treated adequately to give it the physical physical characteristics necessary for any tool, the shape of which is flat and rectangular, substantially elongated and having a relatively small width compared to

3 its length.

  The rear part of this body 1 is covered with a thick plasticized sheath 2 forming a handle and allowing the user a good grip.

manual.

  The front area of the tool widens into a virtually trapezoid shape

  rectangle 3, tilt at an angle of 160 to the plane of the body 1.

  This front zone ends with a wider opening 5 than that of the body 1. The inclined side of the trapezoid 4, which diverges to form this wider zone 3, forms an angle of 120 relative to the late ral profile of the body 1 , while the opening 5 has, on one side, a sail lantern pivot 6 on which is placed a stop 7 of slightly softer material, serving as a support for the tool. On the opposite side, the opening 5 is extended by forming an extraction finger 8, provided with a point towards the outside and

  with a slightly rounded outline.

  The stop 7 has a cylindrical and hollow shape, with an internal diameter suitable for being firmly adjusted on the pivot 6 of the open

  ture and a closed end having a rounded external shape.

  The end 3 of the tool 1 where the extraction finger 8 is located, that is to say the right angle of the trapezoid, forms a zone 9 with a reduction in thickness because its upper face is inclined by 7 relative to the rest of the end 3. As a result, this finished zone 9, at its front edge, practically by a sharp edge, the extraction finger 8 thus having a thickness much smaller than that of the body 1 of the tool. Such a reduced thickness is necessary for this extraction finger 8 to be able to be inserted behind the inner edge of the retaining ring 10, near the core 1 1 around which this retaining ring 10 is placed, as is my

be shown in Figures 9 and 10.

  As these figures and FIG. 11 show, once the extraction finger 8 is engaged behind the retaining ring 10, the tool is lifted up to assume a position practically perpendicular to the surface of the part in which is place the retaining ring 10, ius that the support stop 7 is supported on this surface. At this time, the user can tilt it in the opposite direction to lift the retaining ring 10, using the finger 8. The ease of extraction is

  obvious and the physical effort to achieve is minimal.

  As can be seen with reference to FIG. 9, the width of the grip opening 5 depends on the thickness of the edge of the housing 12 of the retaining ring, as well as on the diameter of the retaining ring 10. For for this reason, a smaller outlet opening 5a (see FIG. 3) may be useful for extracting the retaining rings 10 located in boxes

12 with a narrower rim.

  In this case, the outside dimension 4a of the trapezoidal area 3a pre

  o sense a slope of 135, as can be seen in Figure 3.

Claims (5)

  1. Tool for extracting retaining rings from gaskets, characterized in that it comprises a metal body (1), or of very resistant material, covered at its end with a handle zone ( 2), preferably plasticized, and having a flat and rectangular shape, appreciably elongated and not very wide, and in that the front zone (3) of said body (1) is enlarged and has the shape of a trapbze practically rec tangle, the large base of which constitutes a large opening (5, 5a), said front zone (3) forming an angle of 160 relative to the plane of said body (1).   2. Tool according to claim 1, characterized in that the inclined dimension (4) of the trapeze, which diverges to form the enlarged front zone (3), forms an angle of at least 120 relative to to the lateral profile of the body.   3. Tool according to one of claims 1 or 2,   characterized in that the grip opening (5, 5a) of the front zone (3) pos sbde, at its narrower end, a protruding pivot (6) on which is adjusted and fixed a cylindrical support stop ( 7), with an outside head.   4. Tool according to one of claims 1 to 3,   characterized in that, at the widest end of the grip opening (5, a), there is an extraction finger (8), situated on a small zone (9) of decreasing thickness, having a slope of 7 relative to the rest of said front zone, this extraction finger (8) having a rounded outline and being situated towards the outside of the body so as to be placed under the internal edge of the retaining ring (10), between this ci and the core (11) where it is placed.   5. Rune salon tool of claims 1 to 4,   characterized in that the intake opening (5, 5a) of the front zone (3) pre-   feels a variable width adapted to the diameter of the retaining ring