EP0598010B1 - Patin de pon age a la main dote d'une chambre d'aspiration ou plus generalement d'un passage pour fluide - Google Patents

Patin de pon age a la main dote d'une chambre d'aspiration ou plus generalement d'un passage pour fluide Download PDF

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Publication number
EP0598010B1
EP0598010B1 EP92917501A EP92917501A EP0598010B1 EP 0598010 B1 EP0598010 B1 EP 0598010B1 EP 92917501 A EP92917501 A EP 92917501A EP 92917501 A EP92917501 A EP 92917501A EP 0598010 B1 EP0598010 B1 EP 0598010B1
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EP
European Patent Office
Prior art keywords
holes
pad according
pad
fluid
path
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Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP92917501A
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German (de)
English (en)
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EP0598010A1 (fr
Inventor
Carla Galassi
Giovanni Scollo
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping

Definitions

  • the present invention relates to a pad, also called “sanding mop” for hand processing, with abrasive paper, without any machine, surfaces to be rough-shaped, smoothed, finished or cleaned up from residual paints or others, with a fluid path formed therein in order to suck or drain with the fluid itself those powders generated during processing.
  • pads for manual use have been manufactured and used, such as that being object of US Patent No.4184291, provided with holes on the lower surface, which are all communicating with only one central collecting hole on the upper surface, e.g. passing through a projecting portion in a spongy material like that forming the pad, all being housed in a box fixed to the pad itself and provided with a hose connecting with an outer vacuum source.
  • This box rather bulky, shall of course provide also the handling means of the pad itself.
  • the advantages of the manual pad are failing, since the device flexibility is reduced, as well as its ability of closely following the asperities of the surface to be processed, thanks to the unique manual sensitivity of the operator. Therefore the drawbacks of machine processing are still experienced, with a partial suction of powders, without having on the other hand the advantages of a quicker operation, less tiresome for man.
  • An object of the present invention is therefore that of providing a pad of the above-mentioned type, to be used by hand, comprising, formed therein, means for removing the powders produced during working, so as not to lose, during its utilization, the main features of flexibility and softness, thus being able to perfectly follow all the surface configurations, without the encumbrance of outer auxiliary means such as the above-mentioned suction chamber involving more rigidity, while ensuring at the same time a perfect removal of powders both through suction and by wet way.
  • a pad according to the preamble portion of claim 1 characterized by being formed of three layers of soft and spongy material in a sandwich-like manner, the fluid path therein being formed as a channel-shaped passage obtained by removal of material in the intermediate one of said three layers.
  • powders are removed by suction and the pad is further characterized by the features of any of the claims 2-5 and 11.
  • the removal of powder occurs in a wet environment, whereby the fluid is water and the pad according to claim 1 is further characterized by the features of any of the claims 6-8.
  • the pad of the invention can also be provided with the features of claim 9 or 10.
  • a preferred embodiment of pad as shown in fig.1, provides for an integrally incorporated suction and a vacuum path formed by means of material removal from the central one of three overlapping elements, coupled to each other in a "sandwich-like" manner, preferably in a spongy or expanded material, of which the pad according to the invention is made.
  • This type of material ensures softness and flexibility of the pad.
  • the three elements or layers consist respectively of an upper layer 1 to which a non-rigid handle 10 is fixed, an intermediate layer 2 in which a fluid path 20 is formed, in this case for suction, as well as a connector 21 with an outer hose (not shown) and a lower layer 3 being crossed, through its thickness, by through holes 5 and having on the lower surface coupling means for a piece, preferably replaceable, of abrasive paper 4 also formed with corresponding holes 5'.
  • Handle 10 may be formed as any strip of flexible material, possibly of elastic character in order to be better adapted to hands of different size. Preferably it is formed of two strips respectively fixed to layer 1 at an end portion thereof, or only one strip passing through two slits 11, 11a with the free ends mutually joined in an easily adjustable manner, e.g. being in "Velcro" material for an easy and reliable fastening.
  • the upper layer 1 may have a smaller thickness than the other two layers.
  • the intermediate layer 2 is shaped, by removal of material, such as by means of hollow punching, so as to give rise to a fluid path 20, in this case for sucked air.
  • a first recess 23 is obtained with parallel walls for housing the connector 21 communicating with the outer hose.
  • Said recess 23 is connected to the inside with the actual suction path 20 comprising two parallel, elongated channels 25, 25a which extend themselves to the direction of the longer sides of layer 2 at a given distance therebetween, thus forming a hollow or chamber 27 in front of recess 23, preferably defined to the inside by an arc-shaped wall 22 separating the two channels 25, 25a.
  • the ends of said two channels, which are more distant from said chamber 27, stop before reaching the outer surface of layer 2 but are however in communication with the outside through grooves 29 preferably having a U-shaped cross-section, which are also obtained through partial removal of material, but without reaching the lower surface of the layer.
  • Similar grooves, preferably having the same cross-section, are provided sidely from said channels 25, 25a, thus coming into communication to the outside also from these positions.
  • these lateral grooves have been shown in a number of two at each side of the layer but of course they could be provided in a different number.
  • the last lower layer 3 which has also the same size as the other two layers, at least as far as the two greatest dimensions are concerned, it shows two arrays of through holes 5, each of said arrays being, upon coupling, directly corresponding to the two channels 25, 25a of the intermediate layer 2. It will be appreciated that, instead of the two arrays of holes 5 there could be provided at the same position two elongated slots having the same effect as to suction. It should also be noted that the width of channels 25, 25a is a function of the diameter of holes 5 or the width of the possibly replacing slot. The number of holes is preferably eight, as shown in the drawing, but it could be also different.
  • grooves 29 on three sides of the pad allows for a venting action and an air intake also in this zone, thus avoiding that air is entirely sucked through holes 5, only with consequent adhering of pad itself onto the surface to be processed. It is important that the side vent holes 29 lead inwardly each near a suction hole 5 and that the overall cross-section area through the side vent holes 29 is less (about 70%) than the total cross-section area of holes 5, or better holes 5' of abrasive.
  • FIG 2 another embodiment of the pad according to the present invention is shown, in which the same parts as those of figure 1 are represented with the same reference numerals.
  • the powders are removed by wet instead of suction.
  • the pad is formed of three coupled members or layers overlapping to each other, of which the upper one 1 carries a handle means 10, the lower one 3 is provided with through holes 5, in this case for outflow of water which, flowing through the abrasive material 4, having also corresponding holes, draws therewith the powders generated in the region of working surface.
  • an inner path of fluid 20a which can consist of a channel formed by removal of material in the intermediate layer 2 or, as shown in figure 2, is provided by a tubular body forming a loop from a sleeve 21a of connection with an outer conduit (not shown) for water feeding.
  • the tubular body 20a is provided with holes 24 at each through hole 5 in the lower layer, whereby water, having a given pressure, due to a slight head level, outflows from tubular body 20a, with parallel streams throughout holes 24, which are possibly provided in number of four as well as the underlying holes 5 and obviously also the corresponding holes 5' in the abrasive material 4.
  • holes on the pad bottom, formed through the abrasive material could even be in a different number with respect to holes 24, when providing e.g. an additional central hole receiving water either by spreading throughout the spongy material or by means of radial passages connecting said central hole with the holes arranged circumferentially on the tubular body 20a.
  • the overlapping layers could be only two, with the tubular body 20a housed in corresponding seats formed partially in the lower layer and partially in the upper one.
  • suction chamber 27 is that of rendering uniform and constant the pressure during the whole operation and wherever along the path 20.
  • Such a chamber will have a configuration defined by an arc of circumference shape, for example semicircular, of said wall 22 limiting the same from opposite side to recess 23.
  • the outer shape of the pad could vary, such as to result e.g. of circular cross-section or the shape and direction of the inner path 20 of fluid, both when the fluid is sucked air, and in case of water in the wet type operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

Patin en matériau souple et élastique servant au ponçage à la main de surfaces à l'aide de papier abrasif. Il possède un passage intérieur pour fluide communiquant avec l'extérieur par l'intermédiaire d'un manchon lui-même relié, par l'intermédiaire d'un tube, à une source de vide ou de fluide, ainsi qu'avec plusieurs trous traversant la face inférieure de traitement. Lorsqu'on emploie l'aspiration d'air, on a également prévu des évents menant jusqu'à l'extérieur et présentant une superficie de section moins grande que celle des trous d'aspiration. En outre, une chambre d'équilibrage du vide est formée dans ledit passage immédiatement après la mise en communication avec l'extérieur.

Claims (11)

  1. Patin de matériau mou et spongieux pourvu sur sa surface inférieure de moyens abrasifs (4) pour des surfaces de travail à poncer manuellement ou au papier de verre, comprenant dans sa partie supérieure des moyens flexibles de poignée (10) et, à l'intérieur de celui-ci, un chemin de fluide (20, 20a) communiquant tous deux avec un nombre de trous (5) passant à travers ladite surface inférieure en correspondance avec le même nombre de trous (5') à travers les moyens abrasifs (4), et comportant également un connecteur de raccordement (21, 21a) passant à travers une des surfaces latérales du patin et relié par l'intermédiaire d'une manche flexible à une source d'aspiration ou d'alimentation de fluide extérieure, caractérisé en ce qu'il est formé par trois couches (1, 2, 3) dudit matériau mou et spongieux à la manière d'un sandwich, ledit chemin de fluide (20, 20a) étant réalisé sous la forme d'un passage en forme de canal obtenu par enlèvement de matière dans la couche intermédiaire (2) desdites trois couches (1, 2, 3).
  2. Patin selon la revendication 1, caractérisé en ce que ladite source extérieure est une source d'aspiration de fluide et ledit passage de fluide (20) comprend des canaux (25, 25a) en communication avec lesdits trous (5, 5')
  3. Patin selon la revendication 2, caractérisé en ce qu'il comprend en outre des trous latéraux ou des rainures latérales (29) ayant une section transversale sensiblement en forme de U, de surface inférieure à la section transversale desdits trous (5, 5') et ayant la fonction d'évents latéraux ou d'entrées d'air latérales.
  4. Patin selon la revendication 2 ou 3, caractérisé en ce qu'il comprend, dans sa couche intermédiaire (2) immédiatement devant une zone d'entrée (23) dudit connecteur de raccordement (21) une chambre d'équilibrage et de distribution de pression (27), en communication fluide avec lesdits canaux (25, 25a) et définie sur le côté opposé à ladite zone (23) par une paroi concave (22) de la couche intermédiaire (2).
  5. Patin selon l'une quelconque des revendications 2 à 4, caractérisé en ce que lesdits trous (5) de la couche inférieure (3) sont au nombre de huit, disposés selon deux rangés de quatre trous alignés, parallèles l'une à l'autre et aux côtés du patin qui sont plus proches de celui dans lequel le connecteur (21) est installé, en correspondance avec lesdits canaux (25, 25a) également parallèles auxdits côtés.
  6. Patin selon la revendication 1, caractérisé en ce que l'intérieur dudit chemin de fluide (20a) a sensiblement la forme d'une boucle, excepté quelques ouvertures (24) communiquant avec lesdits trous (5) dans la couche inférieure (3), ledit chemin (20a) dans la couche intermédiaire (2) étant alimenté avec de l'eau à travers un connecteur (21a) en communication avec l'extérieur.
  7. Patin selon la revendication 6, caractérisé en ce que ledit chemin (20a) comprend un corps tubulaire de forme sensiblement circulaire dans ledit passage formé en canal, communiquant avec ledit connecteur (21a) et pourvu de trous (24) en correspondance avec lesdits trous (5, 5') dans la couche inférieure (3) et dans le matériau abrasif (4), respectivement.
  8. Patin selon la revendication 6, caractérisé en ce que le nombre desdits trous (5, 5') est supérieur à celui des ouvertures (24) le long du chemin (20a), des petits passages étant prévus pour alimenter de l'eau à partir desdites ouvertures (24) vers ces trous (5) qui ne sont pas directement alimentés par elles.
  9. Patin selon la revendication 1, caractérisé en ce qu'il comprend une poignée (10) sur la couche supérieure (1), formée au moins d'une bande de longueur ajustable en un matériau pourvu de micro-crochets du type "Velcro".
  10. Patin selon la revendication 1, caractérisé en ce que ladite surface extérieure de la couche supérieure (1) est formée de matériau pourvu de micro-crochets du type "Velcro".
  11. Patin selon la revendication 2, caractérisé en ce que lesdits trous (5, 5') sont respectivement réalisés sous la forme d'une seule paire de fentes allongées, correspondant chacune à un desdits canaux (25, 25a).
EP92917501A 1991-07-25 1992-07-24 Patin de pon age a la main dote d'une chambre d'aspiration ou plus generalement d'un passage pour fluide Expired - Lifetime EP0598010B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITMI912061 1991-07-25
ITMI912061A IT1251108B (it) 1991-07-25 1991-07-25 Tampone per scartavetrare a mano provvisto di camera di aspirazione incorporata o in generale di un passaggio di fluido.
PCT/IT1992/000086 WO1993001913A1 (fr) 1991-07-25 1992-07-24 Patin de ponçage a la main dote d'une chambre d'aspiration ou plus generalement d'un passage pour fluide

Publications (2)

Publication Number Publication Date
EP0598010A1 EP0598010A1 (fr) 1994-05-25
EP0598010B1 true EP0598010B1 (fr) 1996-12-04

Family

ID=11360430

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92917501A Expired - Lifetime EP0598010B1 (fr) 1991-07-25 1992-07-24 Patin de pon age a la main dote d'une chambre d'aspiration ou plus generalement d'un passage pour fluide

Country Status (4)

Country Link
EP (1) EP0598010B1 (fr)
DE (1) DE69215683T2 (fr)
IT (1) IT1251108B (fr)
WO (1) WO1993001913A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9417176U1 (de) * 1994-10-26 1994-12-22 wolfcraft GmbH, 56745 Weibern Handschleifer
US5634843A (en) * 1995-01-17 1997-06-03 Liu; Te-Hsi Multi-functional grinding wiper
GB2321421A (en) * 1997-01-24 1998-07-29 Harry Dudley Bromfield Device for use in sandpapering
GB2356165A (en) * 1999-09-16 2001-05-16 William Mcmillan A particle extraction device
US6921438B2 (en) 2002-07-30 2005-07-26 John Lausevic Vacuum cleaner attachment for fungi removal and method of use thereof
DE202007018938U1 (de) * 2006-10-30 2009-12-17 Dubinin, Evgeniy Reibe
CN104736295A (zh) * 2012-08-22 2015-06-24 3M创新有限公司 砂磨系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4202139A (en) * 1978-04-06 1980-05-13 Minnesota Mining And Manufacturing Company Conformable hand sanding pad
DE3742038A1 (de) * 1987-12-11 1989-06-22 Gerd Braasch Schleifkoerper fuer die bearbeitung von oberflaechen, insbesondere holzoberflaechen
US5007206A (en) * 1989-10-05 1991-04-16 Paterson Patrick J Dustless drywall sander

Also Published As

Publication number Publication date
ITMI912061A0 (it) 1991-07-25
IT1251108B (it) 1995-05-04
DE69215683T2 (de) 1997-04-17
DE69215683D1 (de) 1997-01-16
ITMI912061A1 (it) 1993-01-26
WO1993001913A1 (fr) 1993-02-04
EP0598010A1 (fr) 1994-05-25

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