WO1983002756A1 - Ameliorations relatives a des assemblages d'essuie-glaces - Google Patents

Ameliorations relatives a des assemblages d'essuie-glaces Download PDF

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Publication number
WO1983002756A1
WO1983002756A1 PCT/AU1983/000018 AU8300018W WO8302756A1 WO 1983002756 A1 WO1983002756 A1 WO 1983002756A1 AU 8300018 W AU8300018 W AU 8300018W WO 8302756 A1 WO8302756 A1 WO 8302756A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
scrubber
movement
leading
trailing
Prior art date
Application number
PCT/AU1983/000018
Other languages
English (en)
Inventor
Alexander Szucs
Original Assignee
Alexander Szucs
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 Alexander Szucs filed Critical Alexander Szucs
Priority to AU11577/83A priority Critical patent/AU1157783A/en
Publication of WO1983002756A1 publication Critical patent/WO1983002756A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B60S2001/3812—Means of supporting or holding the squeegee or blade rubber
    • B60S2001/3817—Means of supporting or holding the squeegee or blade rubber chacterised by a backing strip to aid mounting of squeegee in support
    • B60S2001/382—Means of supporting or holding the squeegee or blade rubber chacterised by a backing strip to aid mounting of squeegee in support the backing strip being an essentially planar reinforcing strip, e.g. vertebra
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B60S2001/3812—Means of supporting or holding the squeegee or blade rubber
    • B60S2001/3824—Means of supporting or holding the squeegee or blade rubber the blade or squeegee pivoting about an axis parallel to blade longitudinal axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B60S2001/3827—Wiper blades characterised by the squeegee or blade rubber or wiping element
    • B60S2001/3829—Wiper blades characterised by the squeegee or blade rubber or wiping element characterised by the material of the squeegee or coating thereof
    • B60S2001/3831—Wiper blades characterised by the squeegee or blade rubber or wiping element characterised by the material of the squeegee or coating thereof cleaning by scrubbing or abrasive action
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B60S2001/3827—Wiper blades characterised by the squeegee or blade rubber or wiping element
    • B60S2001/3836—Wiper blades characterised by the squeegee or blade rubber or wiping element characterised by cross-sectional shape
    • B60S2001/3837—Wiper blades characterised by the squeegee or blade rubber or wiping element characterised by cross-sectional shape with more than one wiping edge or lip

Definitions

  • the present invention relates to a windscreen wiper assembly for clearing the surface of a windscreen of, for example, water, ice, dirt, insects, grease and the like.
  • a windscreen it is intended to include not only a front screen of a vehicle but also, for example, a rear screen and a headlamp screen, or lens of the vehicle.
  • the bristle are rigidly secured to the blade in such a manner that when the tips of the bristles engage debris on the screen the increased resistance to movement of the bristles across the screen will likely cause a reaction force to be transferred to the blade and thereby tilt the blade out of its optimum operating angle so that the blade may no longer operate satisfactorily to remove water from the screen.
  • the blade in order to operate satisfactorily, the blade must be relatively flexible and the rigid attachment of the bristles to the blade has a tendency to reduce such flexibility, at least when the bristles are in engagement with the screen.
  • a windscreen wiper assembly adapted to clean a windscreen by reciprocating motion across the surface of the windscreen, comprising:- blade means comprising an elongate flexible wiping blade engageable with the surface and pivotable about an axis parallel to its length to orientate the blade relative to the -surface according to the direction of movement of the blade means across the surface to thereby wipe said surface in at least one direction of movement, and an elongate scrubber adapted to engage the surface and scrape deposited material from the surface, the scrubber being located at the leading lateral side of the blade in said one direction of movement and arranged such that when leading and when trailing behind the blade means in the respective directions of movement of the blade means across the surface the scrubber is respectively in and out of engagement with the surface, the scrubber when leading the blade means being pivotable independently of the blade.
  • the blade is tiltable about its length to an optimum working angle, which is usually acute relative to the direction of movement of the blade means across the screen and a scrubber is automatically brought into engagement with the screen when it is on the leading side of the blade means and is displaceable independently of the blade.
  • a scrubber is automatically brought into engagement with the screen when it is on the leading side of the blade means and is displaceable independently of the blade.
  • the blade means may comprise two elongate flexible wiping blades in side by side array and pivotable about respective axes parallel to their lengths in order to permit orientation relative to the surface of the trailing blade in the respective sense of direction of movement of the blade means across the surface whereby the trailing blade is adapted to wipe the surface, in which case the scrubber, when leading the blade means, must be pivotable independently of the said trailing blade.
  • the trailing blade will perform the usual wiping function and preferably the wiper assembly is such that the leading blade in the respective sense of direction of movement of the blade means across the surface is pivoted out of engagement with the surface.
  • the windscreen wiper assembly in accordance with the present invention only has a scrubber available to scrape debris from the screen in one sense of direction of movement of the wiper assembly across the screen.
  • scraping may be performed in both senses of direction of movement of the wiper and there are accordingly preferably provided two elongate scrubbers each adapted to engage the surface and scrape deposited material from the surface, the scrubbers being located at respective lateral sides of the blade means and arranged such that the leading and trailing scrubbers in the respective sense of direction of movement of the blade means across the surface are respectively in and out of engagement with the surface, the leading scrubber being displaceable independently of the blade or of the aforementioned trailing blade.
  • the scrubber or scrubbers must be displaceably, preferably pivotally, supported independently of the blade, although tilting movement of the blade may also affect the scrubber or scrubbers, for example to move the scrubber or scrubbers into or out of engagement with the surface.
  • the scrubber or scrubbers may again be displaceably supported independently of the wiper blades, but preferably the or each scrubber is carried by a respective blade.
  • a trailing scrubber With the trailing blade in engagement with the surface, a trailing scrubber is automatically pivoted out of engagement.
  • the or each scrubber is separable from the wiper and may be replaced if it becomes worn. Since the or each scrubber is adapted to remove any debris on the surface, the operational life of the wiper blade should be extended.
  • the or each scrubber may take any one of a variety of forms.
  • a scrubber may be in the form of a brush having bristles projecting generally forwardly on the leading side of the wiper.
  • a brush is not preferred since the bristles have a tendency to distort when engaging debris on the screen and are not self-cleaning.
  • the bristles could be provided on one or both of two wiper blades or be supported for separate pivotal movement relative to the or each wiper blade.
  • the or each scrubber is such that the independent displacement of the scrubber in engagement with the screen surface permits said scrubber to engage with the surface to a greater or lesser extent with, respectively, increased or decreased frictional resistance between said scrubber and the surface without substantially affecting the wiping action of the blade or of the trailing blade.
  • the scrubber which leads the blade means across the surface engages only water on the surface, it_ may be in only light engagement with the surface thereby minimising frictional resistance and wear of the scrubber.
  • the or each scrubber may comprise a spongy body which may distort under resistance to movement across the surface under pressure with the screen, and also absorb water from the surface for future use.
  • a body may be in the form of a nylon honeycomb webbing of sponge- like material with a coarse surface.
  • OMPI scrubber may comprise a substantially rigid body.
  • the surface of the scrubber whether the body thereof is soft or rigid, preferably defines at least two working surfaces of the scrubber assembly so that under normal conditions when only water is being swept from the screen a first low friction surface portion engages the screen under low contact pressure, whereas under scrubbing conditions produced by increased resistance to movement, a second scrubbing portion may be engaged.
  • the second scrubbing portion may be engaged merely by pivotal movement of the scrubber or also, or alternatively, by deformation or distortion of the aforementioned sponge ⁇ like body.
  • the second scrubbing portion of the body may be provided with a coarser or more rigid surface structure, such as projections from the surface, and/or the surface structure may have a greater length.
  • the body may be circular, generally diamond shaped with the first scrubbing portion defined on one face and the second scrubbing portion on another face which is brought into engagement with the screen by increased pivotal movement of the scrubber, or any other suitable shape which in use defines two distinct working portions of the scrubber assembly.
  • the scrubber or scrubbers may alternatively be substantially freely pivotable under low friction conditions but be restricted in the pivotal movement under high friction conditions.
  • a backing member for example, which limits the movement so that a greater force is applied to the surface through the scrubber.
  • the backing member may be engaged by the blade body to limit pivotal movement of the leading scrubber, and likewise the blade body of the trailing blade may engage the backing member to limit pivotal movement of the trailing blade, such engagement possibly being through the trailing scrubber.
  • the blade body, the scrubber and/or the backing member may all be suitably shaped to provide such engagement and should also be shaped such that the leading blade and/or scrubber do not materially affect the working function of the trailing blade.
  • the or each blade is supported by a reduced thickness neck portion to provide the pivotal movement of the blade (and if provided, of the associated scrubber) and the leading blade is displaceable into a space defined adjacent said neck portion of the trailing blade.
  • the leading blade tip may, in use, engage the trailing blade to close said space but particularly where the pivotal movement of the trailing blade is limited by, for example, the trailing scrubber, such engagement need not affect the working function of the trailing blade.
  • the scrubber may be formed integrally with the blade and of the same material, for example rubber.
  • the scrubber may be cam shaped to define two working portions and_ may comprise a soft body but preferably it has a substantially rigid structure.
  • each scrubber comprises a rigid body having elongate blade ⁇ like projections which are angled such that under normal conditions as each blade-like projection engages the screen with greater or lesser pivotal movement of the scrubber assembly it lies at an angle of 15-45 degrees to the screen, and preferably between 25 and 35 degrees, to provide a razor-like scraping action.
  • the blade-like projections may be formed on a removable insert, formed of, for example, nylon or acetal. Alternatively a separately-formed scrubber may be attached to the blade means by moulding or by adhesive. It will be appreciated that the lower the angle of contact of each projection with the screen, the lower the accompanying scraping noise will be.
  • the wiper assembly also includes a wing or flair integrally moulded therewith which is such that airflow over the windscreen caused by forward motion of the vehicle will flow over the wing or flair in a manner which forces the wing or flair and therefore the wiper onto the screen.
  • wing or flair extends the full length of the wiper blade means, as does the or each scrubber.
  • FIGS 15 to 24 illustrate in cross-section a plurality of embodiments of a wiper in accordance with the invention, together with modifications thereto, in which each scrubber is mounted on a respective one of two wiper blades.
  • windscreen wiper assemblies such as may be used in vehicles and which are held against the windscreen by means of a spring-loaded arm connected to a motor to provide reciprocating motion to the arm and wiper assembly across
  • the wiper assembly is held in well known manner by means of a slide member attached to the wiper and a claw attached to the arm.
  • the slide and claw are such as to prevent or at least severely limit pivotal movement therebetween, any such pivotal movement being as a result of the necessity to permit the slide and claw to be released from each other.
  • the slide is not always shown but it will be appreciated that the slide or similar means to connect the wiper assembly to the arm will always be provided.
  • a windscreen wiper assembly comprising an elongate blade 1 of triangular cross-section and having a screen engaging tip 2, the blade being integrally moulded in rubber with a flexible neck 3.
  • the neck 3 has a cross piece 4 also integrally formed in rubber but relatively rigid compared to the neck. If the cross piece 4 is insufficiently rigid, a co-operating rigid plate (not shown) may be associated with it.
  • Extending from above the cross piece 4 is an integral rubber slide member 5 which is adapted to be received in a claw of a spring-loaded wiper arm.
  • the claw of the wiper arm will extend around the slide member 5 and abut the top surface of the cross piece 4 whereby the cross piece is held substantially rigid relative to the wiper arm
  • a support member 6 having a pair of depending slide jaws 7 at its lateral extremities.
  • the support member 6 may be relatively flexible compared to the cross piece 4 and if so, as shown, may be supported by a rigid member 8, for example of steel.
  • the rigid member 8 may be introduced during moulding of the wiper assembly, but as shown, is introduced subsequently and is formed in two parts on respective sides of the neck 3, the neck 3 having a longitudinal array of slots therein through which interlocking portions of the member 8 pass.
  • the rigid member 8 has two series of openings therein through which inter-engaging pegs 9 formed integrally with the support member 6 are located. By this arrangement, the support member 6 is made rigid with the member 8.
  • the blade 1 tilts relative to the slide member 5 and cross piece 4 through flexing of the neck 3.
  • Such flexing or pivotal movement causes the right-hand end of the support member 6 and rigid member 8 to dip and the left-hand end to raise.
  • the angle of inclination of the blade 1 and the corresponding tilting of the assembly of members 6 and 8 is such that the left-hand scrubber is raised off the surface of the screen and the right-hand slide jaw 7 is
  • the second surface portion 17 is adapted to provide a greater scrubbing effect than the first surface portion 16, for example by having sharper or more rigid surface projections and by there being a greater force therethrough onto the screen to remove the debris.
  • the added pressure applied to the scrubber is caused by the adjustment in the direction of downward pressure when the assembly of members 6 and 8 tilts further on engagement by the scrubber with the debris. Furthermore, with the lowering of the right-hand jaw 7, there will be minimal lifting force applied to the right-hand scrubber. Removal of the debris may of course take more than one sweep of the wiper.
  • the positioning of the blade 1 and scrubbers 10 is be such that the working scrubber, even when deformed, still permits the blade to pivot independently and the embodiment illustrated in Figure 1 alleviates the problems of lifting of the blade tip during heavy scrubbing, rigidity of the blade and generally loss of wiper arm pressure to the blade.
  • the blade 1 At the end of the sweep of the wiper to the right in the drawing, when the wiper arm begins to move to the left, the blade 1 will pivot about the neck 3 whereby the right-hand end of the assembly of members 6 and 8 is raised and the left-hand end is dropped.
  • each scrubber 10 and the pivotal movement in the neck 13 must be taken into account in determining the displacement of the scrubber through the pivotal movement of the assembly of members 6 and 8, in order to ensure minimal interference with the operation of the blade 1 and optimum operation of the scrubber in both its working conditions. It will be appreciated that only one scrubber need be provided but scrubbing action will then only be provided in the one sense of direction. As shown, the scrubbers have surface projections on both sides thereof so that they may be rotated through 180 degrees if the projections on one side become worn or distorted, to utilise the other side. Alternatively, the two scrubbers may be swapped with each other so that the other side of each is used.
  • the wiper illustrated in Figure 3 is similar to that shown in Figure 2 in that the independent scrubbers 10 are supported by an integral rubber support 18' which is self-supporting from the neck 3.
  • the support 18' is not tapered on its upper surface but pivotal movement thereof occurs through the neck 3 whereby the upper surface can abut the cross piece 4.
  • the shape of the blade 1' is different to that of the previous two embodiments in that it has rounded cut out portions 19 to give the blade 1' flexibility relative to the support 18' .
  • the scrubbers 10 are independently pivoted in the same manner as in the embodiment of Figure 2, and as shown in Figure 3 when the wiper is moved to the left the support 18' pivots about the neck 3 so that the blade 1' lies at an acute angle relative to the portion of the screen to be wiped.
  • the right-hand scrubber 10 is accordingly raised from the screen while the left-hand scrubber 10 is lowered onto the screen.
  • the shape of the body of the left-hand scrubber 10 is shown under normal conditions when the screen is merely wet so that only a first portion of the surface of the body is in engagement with the screen. It will be seen that the scrubber 10 fits partly into the cut out neck portion 19 of the blade permitting the independent movement of the scrubber and of the blade. When the left-hand scrubber strikes debris on the screen, the scrubber will be restrained from forward movement so that the second working surface portion of the body 11 is brought into engagement by
  • a solid rubber support 18' ' extends from the neck 3 and is itself supported by a rigid member 8 although this may be dispensed with if the support is sufficiently rigid itself.
  • the support is formed integrally with slide jaws 7 to receive scrubbers 10 as in the previously described embodiments.
  • the support 18 ' ' tapers into a recessed neck portion 19' from which extends the integrally formed blade I' *. Limited flexing of the blade I* ' is permitted through the neck portion 19' and, as in the Figure 3 embodiment, the recessed portion 19' opens up when the support member 18' * and blade I 1 ' are tipped over in operation to permit the leading scrubber 10 to sit partly in the recessed portion.
  • the majority of the flexing of the blade in this embodiment is through the neck 3 above the support member 18 * * and in the blade tip, but the scrubbers 10 are independently pivoted relative to the blade through the flexible neck members 13.
  • FIG. 5a and 5b a further modification to the type of wiper in accordance with the invention shown in Figure 1 is illustrated, in this instance the difference from the Figure 4 embodiment being only in the shape of the blade l' * * and support 18- * 1 .
  • the blade has a slightly greater taper than the blade I' 1 of Figure 4 and is joined across its full cross-sectional width with the support 18 ' * ' , so that no recessed portion is provided between the two.
  • the scrubbers 10 are sufficiently spaced from the blade 1' ' ' to not abut the blade in use, the scrubbers being of a flexible nature.
  • the rubber blade I'-' has a degree of flexibility but the majority of the pivoting thereof is performed through the neck 3, with the scrubbers 10 again being independently pivotable relative thereto.
  • the loss of wiper height from the neutral condition shown in Figure 5a to the working condition shown in Figure 5b due to tilting movement of the blade must not be greater than the lifting effect to the trailing scrubber 10 caused by the pivotal movement of the support 18 * * * , or the trailing scrubber will not be lifted from the screen surface. It is important that the trailing scrubber 10 is lifted from the surface since it will otherwise have a tendency to leave a blur across the screen.
  • the controlled loss of height of the wiper and the lift to the trailing scrubber must be built into the design of the wiper.
  • the loss of height of the wiper due to pivotal movement of the blade must also be sufficient to permit the blade tip 2 to work freely, that is to bend flexibly under pressure over the screen 15.
  • the blade will require less pressure than a wiper assembly in which only a blade is provided to perform its function satisfactorily and the pressure from the wiper arm may be equally shared between the blade and leading scrubber 10 or even scrubber biased. The controlling influence of the leading scrubber over the
  • OMPI blade should be minimal and, where there is any such influence, it may be used to maintain a preferred blade angle.
  • Figure 5b illustrates the wiper during heavy 5 work conditions, that is with the leading scrubber 10 having engaged debris on the screen to bring into operation the second working surface of the scrubber, and therefore with the support 18'.- ' abutting the cross-piece 4.
  • Figures 6a and 6b illustrate a further embodiment of scrubber 10' having a shorter and more rigid neck 13' than the previously described embodiments.
  • Figure 6a shows the scrubber in a neutral condition when • the wiper assembly is stationary whereas
  • Figure 6b shows 15 the scrubber in a low friction wiping condition with surface portion 16 engaging the screen 15 and about to engage debris thereon.
  • the support 18' is of the type generally shown in Figure 3 with no backing strip but has an integrally moulded neck member 20 to support the 20 removable scrubber 10'.
  • the neck member 20 comprises a slide jaw 7' which receives the beading 14' of the scrubber in a sliding interference fit.
  • the slide jaw 7' is supported from a thickened neck portion 20a depending from the support 18 ' and a reduced thickness neck portion 25 20b of the neck member 20 between the thickened portion 20a and the slide jaw 7'.
  • the support 18' is self supporting relative to the neck 3 (not shown in this figure) but in order to provide additional flexibility therein relative to the blade, a reduced thickness 0 portion 21 is provided in the support.
  • the second surface area 17 is for use in heavy duty conditions, such as in removing dirt from the screen 15 and as shown is designed with a coarser, denser pattern of outwardly protruding projections, which are preferably of nylon, possibly with rubber tips.
  • the scrubber may be moulded integrally with the support 18 ' and neck member 20 so that it is not removable from the support 18' in which case it will be made wholly of rubber.
  • Figure 6b shows the leading scrubber about to engage surface dirt 21 on the screen.
  • the engagement of the dirt by the surface projections 23 of the second portion 17 of the scrubber increases drag between the scrubber and the screen sufficiently to cause additional pivoting movement of the neck member 20 in the portion 20a.
  • pivotal movement occurs at this stage in the portion 21 of the support member 18" whereby the second portion 17 of the scrubber is permitted to substantially overlie the screen without lift from the support member 18' and thereby provide greater engagement between the dirt 21 and the scrubber.
  • the scrubber body 11 is flexible permitting distortion thereof much as shown in Figure 5b when the second working portion 17 is engaged.
  • FIGS 7a and 7b illustrate a further embodiment and show the tilting action of the blade and support member relative to the screen as the wiper assembly is displaced (to the left in the drawings) .
  • the wiper blade 1 differs in that it has ears 24 to limit the pivotal movement of the blade relative to the support 18 although the limitation could be provided by corresponding ears on the support member or by any other suitable means.
  • the scrubbers 10' ' are supported from neck members 20' formed integrally with the support 18.
  • the neck members 20' are substantially rigid relative to the support 18 and any pivotal movement therein is minimised.
  • the neck members 20' may terminate in jaw slides similar to those shown in Figure 1 but as shown the neck members 20' are provided with elongate beads 14' and the jaw slides are formed in the scrubbers.
  • the scrubbers 10' ' of generally circular cross-section with projecting formations on only part of the surface defining the second scrubbing portion 17 and are formed of a flexible sponge-like material to function in a similar manner to the scrubber 10 described with reference to Figure 1 except that substantially all of the independent pivotal movement of the scrubbers occurs in the scrubbers themselves, so that in practice the neck members 20' may be omitted.
  • the smooth first portion 16 of the surface provides a "free-wheeling" function when the screen 15 is wet only.
  • Figure 7a denotes the first scrubbing stage in which there is no pressure loss from the wiper blade and operates when there is merely water, or possibly also grease, on the screen.
  • the trailing ear 24 engages the support 18 to lift the trailing scrubber 10' ' off the screen.
  • the leading scrubber 10'' is held back by the low frictional engagement with the screen through distortion of the flexible scrubber body and minimal pivotal movement of the neck member 20', but is not held forceably against the screen because it is held relatively freely by the flexible neck 20' and is not abutted by the support 18 in this condition.
  • the distortion of the leading scrubber 10' ' on engagement with the screen allows the tilting of the support 18 and the accompanying layover of the wiper blade without pressure loss from the wiper arm.
  • the insert portion may be slidably engageable with the integrally moulded portion, and therefore be replaceable, or may be adhesively or otherwise bonded to the integrally moulded portion, and is preferably formed of a relatively rigid material such as nylon or acetal, with the projections 23 also being formed of such material to provide low frictional resistance with the screen but rigid engagement with deposited material on the screen.
  • Each scrubber comprises a relatively rigid body 11' formed of rubber with an arcuate or cam shaped outer surface on which surface projections 23 are formed for engagement with the screen when leading the wiper blade 1.
  • Each scrubber is freely pivotable about a relatively long integrally moulded flexible neck portion 13, although in the neutral condition shown ' the scrubbers are both raised off the screen in order to permit sufficient pivotal movement of the blade and support 18 in use without the leading scrubber abutting the wiper blade.
  • the full pivotal movement of the leading scrubber is permitted by the inner portion 25 thereof being cut away or reduced.
  • the projections 23 become coarser with increasing distance from the screen and as previously described engage the screen only lightly in the low friction first stage through the portion 16.
  • the cut away portion 25 engages the support member 18 to compress the leading scrubber between the support and the screen with the coarse projections in the second portion 17 engaging the screen.
  • the scrubbers are spaced sufficiently from the blade to not abut the blade, and the length of the neck portion 13, the extent of the body 11', the height of the blade, the pivotal movement thereof and any pivotal movement permitted between the slide member 5 and the slide jaw of the wiper arm must all be determined to ensure the correct operation of the wiper assembly under all conditions, including windscreen curvature and varying wiper arm spring pressures.
  • the shape and operation of the scrubbers 10 ' ' ' are similar to that described hereinafter with reference particularly to Figures 20-24.
  • FIG 12 an elongate scrubber of substantially hemispherical cross-section is shown, for convenience without surface projections. It will be appreciated that while no surface projections are necessary in the first working surface portion 16, they will normally be provided, although again not essentially, on the second surface portion 17.
  • the scrubber may be rotated about 180 degrees as in the embodiment described with reference to Figure 1.
  • the body of the scrubber is substantially rigid.
  • Figure 12 shows the scrubber in each of three conditions, from left to right, neutral, the first working condition in which the scrubber is compressed between the screen 15 and the support 18.
  • the scrubber is supported by a flexible neck 20 as in the Figure 6 embodiment, although in this instance the slide jaw is carried by the scrubber as shown in Figure 7.
  • Each scrubber may be flexible or substantially rigid, but each provides an effective camming action between the portions 16 and 17.
  • the progression between the portions may be sharp or gradual and the surface portions may be self-cleaning.
  • the surface may be fully covered with no deep recesses or holes which could embed hard particles.
  • the scrubbers may comprise sponge or foam or be hollow but re ⁇ iliently constructed, for example of nylon, in which case small holes may be provided for ejection of water in use.
  • the self-cleaning aspects of the scrubber could be improved by providing webbing, netting or other form of wrapping around a sponge-like substance, the wrapping being closely textured with small holes to form a filtering screen in order to allow water in but not harder particles which could get caught and thereby scratch the windscreen.
  • the self-cleaning requirements would thus be performed by the jetting effect of the water exiting through the holes.
  • the scrubbing texture could alternatively resemble concave formations with holes in their middles, to which debris would find it difficult to adhere. If the scrubber is not flexible and
  • a separate actuator or compressor may be actuated by compression against the screen during heavy duty scrubbing.
  • the aforementioned webbing may comprise multiple relatively " movable layers in the form of over-lapping, slideable textural parts through which water may pass but to which no debris of any kind could stick once water movement (in and out) takes place.
  • an alternative neck portion 13'' is illustrated which has a tapering inner surface to provide increasing resistance to pivotal movement of the supported scrubber and to alleviate long term bias of the neck member.
  • FIGS 15 to 24 described hereinafter are directed to a second type of wiper assembly in accordance with the present invention in which there are provided two wiper blades in spaced side by side array with at least one of the wiper blades carrying on its outer surface a scrubber.
  • the wiper blades are pivotable independently of each other but the or each scrubber is fixed relative to the respective blade.
  • both wiper blades carry a scrubber to provide scrubbing motion in both directions of movement of the reciprocating wiper assembly, but only one need be provided to give a scrubbing action in just one of the directions of movement. Where only one scrubber is provided, in the direction of movement in which there is no scrubbing action both wiper blades will provide a wiping motion.
  • two wiper blades 41 and 42 of generally triangular cross-section are supported in spaced side by side manner by respective flexible necks 43 from a substantially rigid support member 44 which is itself rigid with a centrally located T-piece slide member 45.
  • the slide member is held substantially rigid by a suitable claw on a spring loaded wiper arm to hold the wiper against the screen, the wiper arm being reciprocated by a suitable motor to traverse the screen, or part of the screen.
  • Each elongate wiper blade has on its outer surface a full length longitudinal channel 46 of key slot cross-section in which is received the beaded support 47 of an elongate scrubber 48.
  • Each scrubber 48 may be formed of rubber or a flexible sponge-like material as in previous embodiments and has an outer surface 49 defining projections 50 which are adapted to engage the surface of the screen.
  • the inner surface 51 of each scrubber is contoured to fit the outer surface of the wiper blade and the scrubber is of such a width that it covers substantially the full outer surface of the blade apart from the tip 52 which is in engagement with the surface of the screen 53.
  • the outer surface 49 of the scrubber defines two screen engaging portions 54 and 55 with the portion 54 being adapted to scrub the screen surface under low friction conditions and__may have no projections 50, and the portion 55 being adapted to engage the screen surface under heavy duty conditions such as when the scrubber engages debris on the screen. Accordingly, the surface portion 55 may have coarser projections 50, or there may be otherwise adapted to more strenuously engage the debris.
  • the scrubbers 48 may also be formed of substantially rigid material, such as nylon.
  • the trailing right hand wiper 42 tilts over by pivoting action in its neck 43 until the trailing upper corner 56 engages the support 44 to provide the optimum wiper angle, pressure from spring-loaded wiper arm causing the support member 44 to move closer to the screen 53.
  • the blade 41 pivots about its neck 43 in the same manner, but in this instance, the surface portion 54 of the left hand leading scrubber 48 engages the surface, and at the same time the blade tip 52 is raised off the screen, or almost off the screen.
  • the upper trailing corner 57 of the blade 41 should be spaced from the support 44 so that minimal pressure is applied to the screen through the portion 54 of the scrubber surface and substantially all the wiper arm pressure is applied to. the trailing blade 42.
  • the leading scrubber engages debris or other high friction material on the screen
  • the scrubber motion is restrained and the scrubber pivots further about its neck 43 to bring the second surface portion 55 of the scrubber into engagement with the screen.
  • the trailing upper corner 57 of the blade 41 engages the support 44 to apply pressure to the screen through the surface portion 55.
  • some of the wiper pressure may be removed from the blade 42 but this is believed to be of little consequence to the wiping action.
  • the leading scrubber 48 removes or passes over the debris, the pressure sharing and natural resilience of the neck 43 moves the scrubber back into its first scrubbing position in which the surface portion 54 engages the screen.
  • the blades 41 and 42 pivot independently to tilt in the opposite direction and the same action is provided by the opposite blades.
  • the wiper blades 41 and 42, the flexible necks 43, the substantially rigid support 44 and the slide member 45 are all integrally moulded in rubber to provide a unitary construction, and the scrubbers 48 could also be integrally moulded.
  • the rigidity of the support 44 may be provided by a thickening thereof or by moulding therein a separate plate.
  • FIG. 16a and 16b A second embodiment of the second type of wiper in accordance with the present invention is shown in Figures 16a and 16b with Figure 16a showing the wiper assembly in a first low friction condition and Figure 16b showing the wiper assembly in a heavy duty scrubbing motion, in both cases with the wiper moving towards the left in the drawings.
  • the wiper blades 41' and 42' are supported by their flexible necks 43 from an integrally moulded flexible support member 58, although in practice the blades and necks would be closer together than as shown.
  • the necks 43 are continued above the support member 58 to define head portions 59 which are received through cooperating openings in a rigid plate 60 from which the wiper is suspended from the wiper arm in a manner not shown.
  • the wiper blades 41' and 42' have integrally moulded therewith in rubber cam shaped scrubbers 49' which are slightly flexible and which define two working portions 54' and 55' of the surface.
  • the upper inner corners 57' of each wiper blade are reduced by rounding off in contrast to the wiper shown in Figure 15 for no engagement with the support member 58 in the first scrubbing condition but engagement therewith in the second scrubbing condition shown in .
  • Figure 16b but otherwise the wiper functions in identical manner to that shown in Figure 15.
  • the scrubbers may be separate but bonded to or otherwise engaged with the blades.
  • the distance between the reduced inner corner 57' and the portion of the second scrubbing surface 55* engaged by the screen in the second scrubbing condition must be greater than the distance between the support 58 and the screen 53 in said condition in order to provide the compressive force to the scrubber.
  • they may be tapered in the manner proposed in Figure 14.
  • the lip 52 ' may also be extended further beyond where the scrubber joins the blade body to enable sufficient lay ⁇ over thereof and enhance the pivoting action of the blade bodies.
  • Figures 17 and 18 illustrate embodiments of wiper similar to that described in Figures 16a and 16b but modified in the upper inner corner 57' of the blade to provide the engagement with the support member 58.
  • the engaging member 57' comprises an ear.
  • some pressure loss from the wiper blade 41' or 42* to the other scrubber 48' may occur even during the first working condition of the scrubber but this may be of advantage for degreasing the screen during said first condition.
  • Figure 17 shows the scrubber entering the second working condition with flexing about the portion 61, and the same condition is entered with the Figure 18 embodiment by controlled flexing of the ear 57'.
  • Figure 19 shows an embodiment in which an ear 72 is provided on the outer upper corner of the blade body to control the tilting of the body during the blade wiping action.
  • FIGs 20 to 24 illustrate further embodiments of the second type of wiper in accordance with the invention and generally illustrated in Figure 15 but using the principles established in the embodiments of Figures 8 to 11.
  • the wiper shown in Figure 20 has a substantially rigid integrally moulded rubber support member 44 which is supported on a wiper arm by the slide member 45 and from which depend two spaced wiper and scrubber assemblies 62.
  • the assemblies 62 are supported by flexible necks 43 and in the neutral condition shown, the blades 63 are aligned with the neck members 43.
  • the scrubber portion 64 of the assembly 62 is generally similar to the scrubber 10' ' ' of Figures 8 to 11 and is defined by a 90 degree sector whose centre of rotation is defined by the junction of the neck member 43 with the assembly 62.
  • the assembly 62 On its side opposite the scrubber portion 64, the assembly 62 has a portion 65 of conical cross- section whereby in heavy duty conditions previously described, with the associated second portion 64b of the scrubber engaged with the screen to remove debris therefrom, the neck 43 flexes so that it is trailed substantially parallel with the support member 44 and the upper inner surface 66 of the cone portion 65 also extends in said direction with the cone tip 67 engaging said support member 44 to apply pressure onto the screen surface through the second portion of the scrubber.
  • the two assemblies 62 must be sufficiently spaced to permit said alignment of the neck 43 and surface 66 with the support member without substantially affecting the f nction of the wiper 63 of the other assembly 62.
  • the assembly 62 has been modified whereby the scrubber portion or surface 64' is removable, the assembly 62 defining a slide member 69 on which the slide jaws 70 of the portion 64' are received in sliding manner.
  • the scrubber portion 64' may be formed in a rigid plastics, for example nylon or acetal, and defined on its scrubbing surface are elongate razor-blade like formations 71 whose angle of projection vary according to the position around the arc
  • the assemblies 62 are located relatively close to one another and in use the leading, non-wiping blade 63 will abut the tip 67 of the conical formation but it is believed that this will be substantially without affecting the operation of the trailing wiper blade since the angle of the wiper body is held substantially rigid by the slide member 45, and the upper surface 68 of the trailing scrubber member 64 ' engages the support member 44 to define the working angle of the trailing blade 63.
  • the working angle of the trailing blade and leading scrubber is dependent upon the windscreen curvature as well as any give in the mounting of the wiper assembly to the wiper arm.
  • the operation of the wiper of Figure 23 is shown schematically under extreme conditions in Figures 24a and 24b where the wiper in both cases is being moved to the right in the drawing and the blade-like formations 71 on the scrubber are not shown.
  • Figure 24a the wiper assembly is shown at extreme curvature of the screen 53, with the curvature being such that the second working portion of the leading scrubber is in engagement with the screen, but with the friction between the screen and the scrubbers still relatively low so that the leading blade 63 is not being forced heavily against the trailing blade body.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)

Abstract

Un assemblage d'essuie-glace comprend un organe de balai, cet organe de balai comprenant un balai flexible allongé (1') disposé de manière à balayer une surface (15) dans au moins une direction, et un organe frotteur allongé disposé sur le bord latéral d'attaque du balai dans la direction de mouvement et disposé de sorte que lorsqu'il se trouve dans les positions d'attaque et de fuite de l'organe de balai dans les directions respectives de mouvement de l'organe de balai au travers de la surface, l'organe frotteur se trouve respectivement en contact et hors contact avec la surface, l'organe frotteur allongé comprenant de préférence deux frotteurs allongés (10) disposés de chaque côté de l'organe de balai, l'assemblage se caractérisant en ce que l'organe frotteur disposé sur le bord d'attaque de l'organe de balai se déplace indépendamment du balai (1').
PCT/AU1983/000018 1982-02-09 1983-02-09 Ameliorations relatives a des assemblages d'essuie-glaces WO1983002756A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU11577/83A AU1157783A (en) 1982-02-09 1983-02-09 Improvements in or relating to windscreen wiper assemblies

Applications Claiming Priority (16)

Application Number Priority Date Filing Date Title
AUPF2621 1982-02-09
AUPF262182 1982-02-09
AUPF2730 1982-02-17
AUPF273082 1982-02-17
AUPF2814 1982-02-23
AUPF281482 1982-02-23
AUPF322282 1982-03-22
AUPF3222 1982-03-22
AUPF381782 1982-04-30
AUPF3817 1982-04-30
AUPF4360 1982-06-09
AUPF436082 1982-06-09
AUPF6353 1982-10-15
AUPF635382 1982-10-15
AUPF7507830106 1983-01-06
AUPF750783 1983-01-06

Publications (1)

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WO1983002756A1 true WO1983002756A1 (fr) 1983-08-18

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WO (1) WO1983002756A1 (fr)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2162420A (en) * 1984-08-01 1986-02-05 Liu Han Hun Windscreen wiping apparatus
EP0206773A2 (fr) * 1985-06-20 1986-12-30 Hyogo Kaisan Kabushiki Kaisha Lame d'essuyage
US4649593A (en) * 1985-08-14 1987-03-17 Gilliam Iii Julius C Windshield wiper and cleaner
FR2630383A1 (fr) * 1988-04-22 1989-10-27 Gilbert De Vautibault Bernard Balai d'essuie-glace ajoutant a l'agent traditionnel d'essuyage un agent de nettoyage mecanique
US5056183A (en) * 1987-04-23 1991-10-15 Haney Iii Alonzo Windshield wiper blade
EP0487801A1 (fr) * 1990-11-28 1992-06-03 Adrian Cavenago Balai d'essuyage
GB2267818A (en) * 1992-06-18 1993-12-22 Yang Ming Tung Self cleaning windshield wiper
EP0620142A1 (fr) * 1993-04-16 1994-10-19 Valeo Systemes D'essuyage Balai d'essuie-glace
US5406672A (en) * 1994-05-02 1995-04-18 Hipke; Earl M. Windshield wiper system including wiping and scrubbing blades
WO1996013411A1 (fr) * 1994-10-31 1996-05-09 Worktools, Inc. Ensemble essuie-glace souple et plat a profil bas
WO1997035751A1 (fr) * 1996-03-27 1997-10-02 Itt Manufacturing Enterprises, Inc. Balai d'essuie-glace pour systeme d'essuie-glace de vehicule
WO1998015439A1 (fr) * 1996-10-10 1998-04-16 Pita Witehira Dispositif ameliore de nettoyage de surfaces
EP0925211A1 (fr) * 1996-09-11 1999-06-30 Veazie, Waldemar, III Balais d'essuie-glaces sans vibrations et sans soubresauts
WO2009029612A1 (fr) * 2007-08-27 2009-03-05 Evdokimo Arnold W Essuie-glace à balais multiples
US8032976B2 (en) 2008-10-09 2011-10-11 Nelson And Nelson Enterprises, Llc Wiper with rotating cleaning apparatus
US8505153B2 (en) 2010-02-12 2013-08-13 Nelson And Nelson Enterprises, Llc Wiper with vibrating cleaning apparatus
US8715421B2 (en) 2012-01-17 2014-05-06 Nelson And Nelson Enterprises, Llc Wiper with scrubber assembly that is raised and lowered
US8745814B2 (en) 2010-02-12 2014-06-10 Nelson And Nelson Enterprises, Llc Wiper with reciprocating cleaning apparatus
CN104290714A (zh) * 2013-07-19 2015-01-21 博世汽车部件(长沙)有限公司 雨刮器系统
US9738259B2 (en) 2012-01-17 2017-08-22 Nelson And Nelson Enterprises, Llc Wiper with ice removal apparatus
US9914435B1 (en) * 2016-08-13 2018-03-13 Charalampos Nikopoulos Vehicle wiper blade

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB449635A (en) * 1935-04-01 1936-07-01 Montague Vernon Ward Improvements in and relating to windscreen wipers
GB1316781A (en) * 1970-06-08 1973-05-16 Alazet J Wiper blade for cleaning a glass surface
DE2700527A1 (de) * 1977-01-07 1978-09-21 Roland Trautmann Scheibenwischer mit insekten- und schmutzentferner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB449635A (en) * 1935-04-01 1936-07-01 Montague Vernon Ward Improvements in and relating to windscreen wipers
GB1316781A (en) * 1970-06-08 1973-05-16 Alazet J Wiper blade for cleaning a glass surface
DE2700527A1 (de) * 1977-01-07 1978-09-21 Roland Trautmann Scheibenwischer mit insekten- und schmutzentferner

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2162420A (en) * 1984-08-01 1986-02-05 Liu Han Hun Windscreen wiping apparatus
EP0206773A2 (fr) * 1985-06-20 1986-12-30 Hyogo Kaisan Kabushiki Kaisha Lame d'essuyage
EP0206773A3 (fr) * 1985-06-20 1988-07-06 Hyogo Kaisan Kabushiki Kaisha Lame d'essuyage
US4649593A (en) * 1985-08-14 1987-03-17 Gilliam Iii Julius C Windshield wiper and cleaner
US5056183A (en) * 1987-04-23 1991-10-15 Haney Iii Alonzo Windshield wiper blade
FR2630383A1 (fr) * 1988-04-22 1989-10-27 Gilbert De Vautibault Bernard Balai d'essuie-glace ajoutant a l'agent traditionnel d'essuyage un agent de nettoyage mecanique
EP0487801A1 (fr) * 1990-11-28 1992-06-03 Adrian Cavenago Balai d'essuyage
GB2267818B (en) * 1992-06-18 1996-02-28 Yang Ming Tung Winshield wiper
GB2267818A (en) * 1992-06-18 1993-12-22 Yang Ming Tung Self cleaning windshield wiper
EP0620142A1 (fr) * 1993-04-16 1994-10-19 Valeo Systemes D'essuyage Balai d'essuie-glace
FR2703966A1 (fr) * 1993-04-16 1994-10-21 Valeo Systemes Dessuyage Balai d'essuie-glace.
US5406672A (en) * 1994-05-02 1995-04-18 Hipke; Earl M. Windshield wiper system including wiping and scrubbing blades
WO1996013411A1 (fr) * 1994-10-31 1996-05-09 Worktools, Inc. Ensemble essuie-glace souple et plat a profil bas
EP0789654A1 (fr) * 1994-10-31 1997-08-20 Worktools, Inc. Ensemble essuie-glace souple et plat a profil bas
EP0789654A4 (fr) * 1994-10-31 1998-07-22 Worktools Inc Ensemble essuie-glace souple et plat a profil bas
US5724700A (en) * 1994-10-31 1998-03-10 Worktools, Inc. Low profile, flat spring windshield wiper assembly
WO1997035751A1 (fr) * 1996-03-27 1997-10-02 Itt Manufacturing Enterprises, Inc. Balai d'essuie-glace pour systeme d'essuie-glace de vehicule
US6119300A (en) * 1996-03-27 2000-09-19 Itt Manufacturing Enterprises Inc. Wiper blade for a vehicle windscreen wiper device
EP0925211A1 (fr) * 1996-09-11 1999-06-30 Veazie, Waldemar, III Balais d'essuie-glaces sans vibrations et sans soubresauts
EP0925211A4 (fr) * 1996-09-11 1999-12-15 Waldemar Veazie Iii Balais d'essuie-glaces sans vibrations et sans soubresauts
WO1998015439A1 (fr) * 1996-10-10 1998-04-16 Pita Witehira Dispositif ameliore de nettoyage de surfaces
WO2009029612A1 (fr) * 2007-08-27 2009-03-05 Evdokimo Arnold W Essuie-glace à balais multiples
US7596828B2 (en) 2007-08-27 2009-10-06 Evdokimo Arnold W Multiple blade windshield wiper
US8032976B2 (en) 2008-10-09 2011-10-11 Nelson And Nelson Enterprises, Llc Wiper with rotating cleaning apparatus
US8505153B2 (en) 2010-02-12 2013-08-13 Nelson And Nelson Enterprises, Llc Wiper with vibrating cleaning apparatus
US8745814B2 (en) 2010-02-12 2014-06-10 Nelson And Nelson Enterprises, Llc Wiper with reciprocating cleaning apparatus
US8715421B2 (en) 2012-01-17 2014-05-06 Nelson And Nelson Enterprises, Llc Wiper with scrubber assembly that is raised and lowered
US9738259B2 (en) 2012-01-17 2017-08-22 Nelson And Nelson Enterprises, Llc Wiper with ice removal apparatus
CN104290714A (zh) * 2013-07-19 2015-01-21 博世汽车部件(长沙)有限公司 雨刮器系统
US9914435B1 (en) * 2016-08-13 2018-03-13 Charalampos Nikopoulos Vehicle wiper blade

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