Hydraulic connector, particularly for motor vehicle windscreen wiper system

Abstract

The invention relates to a hydraulic connector, particularly for a motor vehicle windscreen wiper system. The connector is designed to be mounted on a wiper blade fitted with a perforated pipe carrying cleaning and de-icing fluid, and comprises at least one inlet coupling suitable for connection to a fluid feed, and at least one distributor provided with at least one outlet coupling designed to be connected to the perforated pipe. The connector also includes at least one internal path for carrying the fluid from the inlet coupling to the distributor. Thus, by means of the presence of the internal path through the connector, the inlet coupling can be positioned at various locations on the connector, without feeding directly into the distributor.

Claims

1. A connector for attaching a wiper blade to a wiper arm, the connector comprising: a single piece housing comprising: a first distributor comprising: a first fluid coupling at a first end of a length of the first distributor, and a second fluid coupling at a second end of the length of the first distributor; a first fluid internal path that comprises two opposing ends in a direction that is oblique with respect to the length of the first distributor, the first fluid internal path comprising: a first inlet coupling at a first end of a length of the first fluid internal path; a first internally connecting portion that hydraulically connects a second end of the length of the first fluid internal path to a portion of the length of the first distributor, wherein a length of first internally connecting portion is perpendicular to the length of the first distributor, and wherein the length of the first internally connecting portion is oblique with respect to the direction of the two opposing ends of the first fluid internal path; and an adapter configured to form a rotatable joint.

2. The connector of claim 1, wherein the second end of the first fluid internal path connects to a portion of the length of the first internally connecting portion.

3. The connector of claim 1, wherein an axis of rotation of the adapter is perpendicular to the length of the first distributor r.

4. The connector of claim 1, wherein an axis of rotation of the adapter is perpendicular to the length of the first fluid internal path.

5. The connector of claim 1, wherein the single piece housing is moulded plastic.

6. The connector of claim 1, wherein a portion of a first end of the length of the first internally connecting portion is open to an exterior of the single piece housing.

7. The connector of claim 6, wherein a second end of the length of the first internally connecting portion connects to the portion of the length of the first distributor.

8. The connector of claim 1, wherein the first distributor is cylindrical.

9. The connector of claim 8, wherein the first internally connecting portion is not cylindrical.

10. The connector of claim 1, wherein the first fluid internal path is cylindrical.

11. The connector of claim 10, wherein the first internally connecting portion is not cylindrical.

12. The connector of claim 11, wherein the first internally connecting portion has a shape that comprises right angles.

13. The connector of claim 1, wherein the single piece housing further comprises: a second distributor comprising: a third fluid coupling at a first end of a length of the second distributor, and a fourth fluid coupling at a second end of the length of the second distributor; a second fluid internal path that comprises two opposing ends in a direction that is oblique with respect to the length of the second distributor, the second fluid internal path comprising: a second inlet coupling at a first end of a length of the second fluid internal path; and a second internally connecting portion that hydraulically connects a second end of the length of the second fluid internal path to a portion of the length of the second distributor, wherein a length of the second internally connecting portion is perpendicular to the length of the second distributor, and wherein the length of the second internally connecting portion is oblique with respect to the direction of the two opposing ends of the second fluid internal path.

14. The connector of claim 13, wherein an axis of rotation of the adapter is perpendicular to the length of the second distributor.

15. The connector of claim 13, wherein the length of the first distributor is parallel to the length of the second distributor.

16. The connector of claim 13, wherein a portion of a first end of the length of the second internally connecting portion is open to an exterior of the single piece housing.

17. The connector of claim 16, wherein a second end of the length of the second internally connecting portion connects to the portion of the length of the second distributor.

Description

(1) Other characteristics and advantages of the invention will appear more clearly and completely when reading the following descriptions of the preferred alternative embodiments which are given as non limitative examples and while referring to the following appended drawings:

(2) FIGS. 1a and 1b: schematically show one exemplary wiper blade respectively as seen in an exploded perspective and in transversal cross-section view,

(3) FIGS. 2a and 2b: schematically show one exemplary hydraulic connector respectively as seen in an exploded perspective and in transversal cross-section view,

(4) FIGS. 3a and 3b: schematically show another exemplary hydraulic connector respectively as seen in an exploded perspective and in transversal cross-section view,

(5) FIGS. 4a and 4b: schematically show a third exemplary hydraulic connector respectively as seen in an exploded perspective and in transversal cross-section view,

(6) FIGS. 5a and 5b: schematically show a fourth exemplary hydraulic connector respectively as seen in an exploded perspective and in transversal cross-section view,

(7) FIG. 6: schematically shows a fifth exemplary hydraulic connector, fully in perspective,

(8) FIGS. 7a and 7b: schematically show a sixth exemplary hydraulic connector, respectively as seen in an exploded perspective and in transversal cross-section view,

(9) FIGS. 8a to 8d: schematically show a seventh exemplary hydraulic connector, fully or partly in perspective as per various embodiments.

(10) As shown in FIGS. 1a and 1b, the wiper blade 2 is connected to or intended to be connected to a drive arm (not shown) via an adaptor 19 to form a windscreen wiper system.

(11) The adaptor 19 is rotatingly connected to a hydraulic connector 1 which is described hereinunder according to various embodiments, while referring to FIGS. 2 to 8, by means of a hinge axis 22 and the assembling holes 20 and 21 respectively provided in the connector 13 and the adaptor 19.

(12) Such hydraulic connector 1, in this alternate embodiment, includes an inlet coupling 5 intended to be connected to the cleaning and/or de-icing fluid feed.

(13) The connector 1 further includes several outlet connections 9, 10, 11 intended to be connected to the blade 2 perforated pipes 3, 4.

(14) More precisely, the connector 1 includes two distributors 7 and 8 which each end by two outlet connections placed at their respective opposite outlets.

(15) Thus, the distributor 7 includes a first outlet connector 9 and a second one at the opposite end thereof, which is not visible on the perspective representation in FIG. 1a. In addition, the distributor 8 includes a first outlet connector 10 and a second one 11 at the opposite end thereof.

(16) As mentioned hereabove, the outlet connectors 9, 10, 11 of connector 1 are suitable for connection to the perforated pipes 3, 4 of the wiper blade 2, which are, in this example, formed in the upper part of the blade 2, which plays the part of the deflector 15, formed in two parts 15, connected on either side of the connector 1. Such perforated pipes 3, 4 include holes making it possible to spray the cleaning and/or de-icing fluid onto the windscreen.

(17) As can be seen more precisely on the transversal cross-section in FIG. 1b, the deflector 15 has a profile so that it receives a mount 16. Such mount 16, according to the specific profile thereof, receives in turn a strip 17 and in the lower part thereof a rubber wiping blade 18 or the like.

(18) Two tips or caps 14 close the end of each part of the deflector 15 so as to close the end of the perforated pipes 3, 4 to prevent the mount 16, the strip 17 and the blade 18 to slide out of their respective recesses as well as for aesthetic reasons.

(19) In the first exemplary hydraulic connector shown in FIGS. 2a and 2b, each distributor 7 and 8 ends with two opposite outlet connections 9, 10, 11, as explained above.

(20) The connector 1 is further provided with two inlet couplings 5, 6, each one being connected to the fluid feed (the same one or two different ones). Such inlet couplings 5, 6 are oriented parallel to the distributors 7 and 8, which are also suitable for being oriented as an extension of, then parallel to the perforated pipes 3 and 4 of the wiper 2, in FIG. 1a.

(21) So long as the wiper 2 is oriented substantially parallel to the drive arm, at least in the rest position, and as the fluid feed connected to the inlet couplings 5 and 6 follows the drive arm, such inlet couplings 5 and 6 are then oriented substantially parallel to the orientation of the fluid feed.

(22) In this example, the connector 1 can be broken down into a first part 1a made in one piece, moulded in plastic material, and a second part 1b, made in one piece, also moulded in plastic material.

(23) Both parts 1a and 1b made in one piece are assembled together so as to form a connector 1 made in one piece.

(24) The assembly must be sealed, and can be obtained for example by ultrasonic welding, or par over-moulding a joint, preferably made of the same plastic material as the one used for either one of parts 1a, 1b, or both.

(25) As can be more precisely seen in the cross sectional view in FIG. 2b, an internal path 23 connects the inlet coupling 5 to the distributor 7, and another internal path connects the inlet coupling 6 to the distributor 8.

(26) Each one of the two internal paths 23 and 24 includes a first portion 23a, 24a, starting from the inlet coupling 5 or 6 and belonging to the first part 1a made of one piece.

(27) The rest of the internal path 23, marked 23b, starts from the portion 23a to meet the distributor 7, and belong to the second part 1b made of one piece. Similarly, the rest of the internal path 24, marked 24b, starts from the portion 24a to meet the distributor 8 and belongs to the second part 1b made of one piece.

(28) Thus, the first part made of one piece 1a includes both inlet couplings 5 and 6, and the first two portions 23a and 23b of the two internal paths 23 and 24, respectively.

(29) In addition, the second part 1b made in one piece includes the rest 23 of the internal path 23 and the rest 24b of the internal path 24, as well as both distributors 7 and 8.

(30) In the second exemplary connector 1, as shown in FIGS. 3a and 3b, only one inlet coupling 5, on the first part 1a made in one piece of the connector 1, supplies the distributor 8 on the second part 1b made in one piece of the connector 1, through the internal path 23 subdivided into a first portion 23a in the first part 1a made in one piece and the rest 23b in the second part 1b made in one piece.

(31) The internal path 24 which opens into the distributor 7, is connected to no inlet coupling.

(32) The first parts 1a made in one piece can then be manufactured separately, with only one 5 or two 5 and 6 inlet couplings, and the second parts 1b made in one piece with only one or two distributors 7 and 8, and to assemble these to form a connector 1 suitable for one type of blade 2 or another one (two perforated pipes, one perforated pipe, . . . ).

(33) In the third exemplary connector 1, such as shown in FIGS. 4a and 4b, only one inlet coupling 5, in a central position, is connected to only one distributor 7, through an internal path 23.

(34) Such distributor 7 may include a hole 13, preferably in the middle thereof, enabling the spraying of the fluid circulating in the pipe of the distributor 7 onto the windscreen to be cleaned or de-iced, at a place of the blade where the perforated pipe 3 or 4 (refer to FIG. 1a) is interrupted.

(35) FIGS. 5a and 5b show a fourth exemplary connector 1, having only one inlet coupling 5 connected to only one distributor 7.

(36) In this example, the only difference with the connector in FIGS. 4a and 4b lies in that the inlet coupling is oriented perpendicularly to the distributor 7, from the top of the connector 1.

(37) The fluid feed, generally oriented substantially parallel to the distributor (refer to the above explanations referring to FIGS. 1a, 2a and 2b), is then connected to the inlet coupling 5 through a L-shaped junction element concealed and locked by the adaptor 19 (refer to FIG. 1).

(38) In this example as in the previous ones, the inlet coupling/couplings 5, 6 are male connections, of the canula type, entering the female fluid feed.

(39) Conversely, in the fifth exemplary connector 1, shown in FIG. 6, the inlet coupling 5 is a female connection or port 5, wherein the male fluid feed, for example of the canula type, is liable to enter.

(40) Except for this difference, such fifth example connector 1 is identical in every way to the fourth exemplary connector 1 as shown in FIGS. 5a and 5b.

(41) The sixth exemplary connector 1, as shown in FIGS. 7a and 7b, shows two inlet couplings 5, 6, each one being connected to a distributor 7, 8, through an internal path 23, 24.

(42) Such connector 1 is also composed of two parts 1a and 1b made in one piece and sealing assembled as explained hereabove.

(43) In this example, the first part 1a made in one piece includes both inlet couplings 5 and 6, and the very first respective portions 23a and 24a of the internal paths 23 and 24, corresponding to the respective horizontal parts of such internal paths 23 and 24, aligned with the inlet couplings 5 and 6.

(44) The second part 1b made in one piece includes the respective remaining parts 23b, 24b of each one of the internal paths 23 and 24 and the greatest part of each distributor 7 and 8 (except for the short horizontal portion aligned with each outlet coupling 9 and 10).

(45) This second part 1b made in one piece thus includes the greatest portion of each one of the internal paths 23 and 24, as well as the greatest part of each distributor 7 and 8.

(46) These remaining parts 23b and 24b of the internal paths 23 and 24 are composed of longitudinally open channels, which are sealingly closed when both parts 1a and 1b made in one piece are sealing assembled, as explained hereabove.

(47) It can be noted that, in this sixth example, the outlet couplings 9 and 10 belong to the first part 1a made in one piece, whereas in the first example, (FIGS. 2a and 2b), such outlet couplings 9 and 10 belong to the second part 1b made in one piece.

(48) In the seventh example, as shown in FIGS. 8a to 8d, the connector 1 is not composed of two parts made in one piece sealing assembled, as in the examples above, but of one piece.

(49) Two inlet couplings 5 and 6 are respectively connected to two distributors 8 and 7 through the two internal paths 23 and 24.

(50) Considering the complexity of the internal paths 23 and 24, which are not in straight line, since the inlet couplings 5 and 6 cannot be aligned with the distributors 7 and 8, it is necessary to provide for unmolding ports 25 and 26 for each one of the internal paths 23 and 24.

(51) Thus, as can be seen in FIG. 8b, each one of the internal paths 23 and 24 shows a first horizontal part starting from the inlet couplings 5 and 6, respectively.

(52) One of these first horizontal parts, for example the one corresponding to the internal path 24, slightly overlaps the other one.

(53) As for the first two horizontal parts, the unmolding is easy since the draining of the material can be executed through the inlet couplings 5 and 6.

(54) Each one of the first horizontal parts of the internal paths 23 and 24 then extends in an oblique part which joins the distributor 7 or 8, as can be seen on the sections of FIGS. 8c and 8d.

(55) Then the internal path 23 connects the inlet coupling 5 and the transversally opposite distributor 8, and the internal path 24 connects the inlet coupling 6 and the transversally opposite distributor 7.

(56) For each one of the oblique parts of the internal paths 23 and 24, it is thus necessary to provide for an unmolding port 25, 26 to enable the draining of the material upon the unmolding operation.

(57) The whole description above is given as an example, and thus is not a limit to the invention.

(58) More particularly, the exact number of inlet couplings 5, 6, of distributors 7, 8, of outlet couplings 9, 10, 11, 12, and of internal paths 23, 24 is not a limit to the invention.

LIST OF DIGITAL REFERENCES

(59) 1hydraulic connector 1a, 1bparts made in one piece of the hydraulic connector 2wiper blade 3, 4perforated pipe carrying cleaning and de-icing fluid 5, 6inlet couplings 7,8rigid joining elements 9, 10, 11, 12outlet couplings 13spraying port 14tips 15deflector 16mount 17strip 18wiping blade 19adaptor 20port for assembling in the hydraulic connector 21port for assembling in the adaptor 22hinge pin 23, 24internal paths 23a, 23b, 24a, 24bportions of the internal paths 25, 26unmoulding ports