GB2387806A

GB2387806A - Tool for withdrawing retainers for sealing gaskets

Info

Publication number: GB2387806A
Application number: GB0305112A
Authority: GB
Inventors: Olga Llevot Betancourt
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-03-14
Filing date: 2003-03-06
Publication date: 2003-10-29
Anticipated expiration: 2023-03-06
Also published as: GB2387806B; ITMI20030464A1; ES1052237U; FR2839670B1; GB0305112D0; DE10258407A1; FR2839670A1; DE20219349U1; ES1052237Y

Abstract

A tool for withdrawing retainers for sealing gaskets, characterised in that said tool comprises a body 1 of metal of another strongly resistant material covered at its back end by a holder-like preferably plastified area 2, such body having a flat and rectangular shape, significantly elongated and thin and the front area of which is extended adopting the shape of a virtually rectangular trapezium 3, the wider side of this constitutes a large mouth 5 and the said area in addition shows an upwards slope in an angle of 160{ with respect to the body itself. The pawl 8 is placed behind the retainer (fig 11,10), the tool is lifted and the supporting butt (fig 11,7) aids the lever action to lift the retainer.

Description

-1 TOOL FOR WITHDRAWING RETAINERS FOR SEALING GASKETS

This disclosure refers to a hand tool specially designed to be used for withdrawing

retainers, the characteristics of which are described below.

5 At given steps of work for the maintenance or repair of automotive heat engines, as well as other machines provided with mechanisms the internal areas of which are perfectly closed by known retainers, it is necessary to withdraw them in order to have access to the said closed area and thus be able to carry out necessary tasks of emptying, filling, checking the levels and like above stated tasks.

10 Currently, it can sometimes be hard to withdraw the retainer because the tools which help an operator are not specially designed for that purpose and this can often provoke damage to the retainer itself or to its environment, with the risk of accidents or injuries at the hands of the operator.

The tool, object of this disclosure, overcomes such drawbacks because it allows that

15 the operator withdraws the retainer in an easy and comfortable way without damaging it nor affecting the environment of such retainer. This easy usage arising from the characteristics of the tool also entails safety for the operator, a greatly important factor according for regulations existing in this sense.

order to fully detail the characteristics of the tool for withdrawing retainers, object 2 0 of this invention, a sheet of drawings is appended to this specification for the purpose of

illustrating a specific example of the tool without in any way limiting the invention.

In such drawings, Fig.1 is an elevation view of the tool which is being disclosed; Fig. 2 is a side view of the same tool corresponding to the above Fig. 1; 2 5 Fig. 3 is a part view, similar to that of Fig. 1 of a front part of the tool in a variation embodiment, for withdrawing retainers having a smaller diameter; Fig. 4 is a sectional side plan view of the supporting butt shown by the tool; Fig. 5 is a perspective view from the back to the front; Fig. 6 is a perspective view, similar to that of the preceding figure, but in a view 3 0 from the front to the back;

-2 Figs. 7 and 8 are also views in perspective of the tool showing its front part, in a view from the front (Fig. 7) and a view from the back (Fig. 8) and from a position different from that of Fig. 5 and 6; Last Figs. 9, 10 and 11, show in perspective the practical application of the tool, in a 5 first position (Fig. 9) in which it is arranged close to the internal edge of the retainer, the position immediately to which it has been introduced behind the said edge (Fig. 10) and last, the action of the tool lifting the retainer (Fig. 11) to withdraw it.

According to the above drawings, the hand tool for withdrawing retainers comprises a metallic body (1), suitably treated to confer it the physicomechanical characteristics 10 necessary for any tool, the shape of which is flat and rectangular, significantly elongated and being relatively thin compared with its width.

The back part of the said body (1) is covered by a plastified sheath (2), with a thick layer which allows the operator to best catch the tool with the hand.

The front area of the tool is extended adopting the shape of a virtually rectangular 15 trapezium (3) the area of which shows an upwards slope with an angle of 160 with reference to the plane of the body (1). Such area ends in a mouth (5) much larger than the body (1). The inclined side of the trapezium (4) which is open to form such larger area (3) forms an angle of 120 with relation to the side profile of the body (1), while the mouth (5) possesses, at its end, a protruding pivot (6) on which a butt (7) is placed, of a somewhat 2 0 softer material, which serves as a support to the tool. On the opposite side, the mouth (5) is extended forming a pawl (8) with its point outwards, showing in turn its softly rounded outline. The butt (7) is cylinder-shaped and hollow, with a suitable internal diameter to tightly fit on the pivot (6) of the mouth and its closed end shows an externally rounded 2 5 shape.

The end (3) of the tool (1), and where the extracting pawl (8) is located, that means, close to the right angle of the trapezium decrease in thickness forming an area (9) because its top face is inclined 7 with respect to the rest of the end (3). Therefore such area (9) ends at its front edge virtually in a draft edge so that the pawl (8) is much thinner than the 3 0 body (1) of the tool, in order that such pawl (8) is introduced behind the internal edge of the retainer (10) close to the core (11) around which such retainer (10) is located as can be clearly seen in Figs. 9 and 10.

-3 As these figures and figure 11 also show, once the pawl (8) is placed behind the retainer (10) the tool will be lifted until locating it virtually perpendicular to the surface of the place where the retainer (10) is located, until the supporting butt (7) is supported on such surface such that the operator can lever up on the opposite sense to lift the retainer 5 (10) with the assistance of the pawl (8). The easy withdrawal is evident, and the physical effort to perform is minimum.

As it can be seen in Fig. 9, the width of the mouth (S) depends on the thickness of the rim of the housing (12) of the retainer, as well as on the diameter of the retainer (10) itself. For this reason, a narrower mouth (Sa) (see figure 3) could be useful for 10 withdrawing retainers (10) located in housing (12) having a narrower rim.

In this case, the trapezoid area (3a) shows its external side (4a) having a slope of 135 , as it can be seen in figure 1.

Having sufficiently described the object of this invention, it must be said that any variation of the non basic shapes and sizes, as well as the 'Kind of material, feature and 15 external finish of the tool, shall not impair its scope which is summarized in the following claims.

Claims

Claims:

1. A tool for withdrawing retainers for sealing gaskets, characterised in that said tool comprises a body of metal or another strongly resistant material covered at its back end by a holder-like preferably plastified area, such body having a flat and 5 rectangular shape, significantly elongated and thin and the front area of which is extended adopting the shape of a virtually rectangular trapezium, the wider side of this constitutes a large mouth and the said area in addition shows an upwards slope in an angle of 160 with respect to the body itself.

10

2. The tool for withdrawing retainers for sealing gaskets, according to claim 1, characterized in that the inclined side of the trapezium which is open to form such wider front area, forms an angle of 120 with relation to the side profile of the body.

3. The tool for withdrawing retainers for sealing gaskets, according to claim 1 15 or claim 2, characterized in that the mouth of the front area possesses, at the pointed end a protruding pivot on which is fitted and fixed a cylindrical supporting butt having a rounded external head.

4. The tool for withdrawing retainers for sealing gaskets, according to any 2 0 one of the preceding claims, characterized in that at the other opposite end of the mouth it shows a withdrawing pawl, located on a small area having a decreasing thickness, as it has a slope of 7 with respect to the rest of the end area, such withdrawing pawl having a rounded outline and it is located outwards the body to be located under the internal edge of the retainer, between this later and the core where it is placed.

S. The tool for withdrawing retainers for sealing gaskets, according to any one of the preceding claims, characterized in that the mouths of the front area can have variable width between the supporting butt and the withdrawing pawl, according to the diameters of the retainers to be withdrawn.