EP0357621B1 - Schleifwerkzeug - Google Patents

Schleifwerkzeug Download PDF

Info

Publication number
EP0357621B1
EP0357621B1 EP88902727A EP88902727A EP0357621B1 EP 0357621 B1 EP0357621 B1 EP 0357621B1 EP 88902727 A EP88902727 A EP 88902727A EP 88902727 A EP88902727 A EP 88902727A EP 0357621 B1 EP0357621 B1 EP 0357621B1
Authority
EP
European Patent Office
Prior art keywords
strip
tool
sections
workpiece
body section
Prior art date
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
EP88902727A
Other languages
English (en)
French (fr)
Other versions
EP0357621A1 (de
EP0357621A4 (en
Inventor
Richard Petrovich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Petrovich Richard
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0357621A1 publication Critical patent/EP0357621A1/de
Publication of EP0357621A4 publication Critical patent/EP0357621A4/en
Application granted granted Critical
Publication of EP0357621B1 publication Critical patent/EP0357621B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B24D15/02—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface
    • B24D15/023—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface using in exchangeable arrangement a layer of flexible material

Definitions

  • This invention relates to the art of abrasive tools, and more particularly to a tool having a body having a removable abrasive strip mounted longitudinally thereabouts.
  • abrasive tool is needed to finish the surface of a workpiece or product.
  • Hand-held sanding blocks or grinders generally find advantageous application when the work surface is large or planar, and sufficient room is available to manipulate such tools.
  • a typical example of a sanding block is that disclosed in US-A-2457466 which has a generally flat body which is rounded at one end and is provided at the other end which a tension device to keep the abrasive strip in a state of tension around the body.
  • US-A-2493852 discloses a broad sanding block having a body with two body sections having a flexible endless abrasive strip around the body, with tension means for holding the strip in tension on the body.
  • a hand-held tool for abrading, polishing or sanding a planar or contoured surface comprising a body (12) for carrying a removable, flexible endless abrasive strip (22) longitudinally about the body, and tension means (110) for holding the strip in tension on the body; wherein the body (12) is a body assembly comprising first and second body sections (14, 16) which are for carrying the strip (22) along a predetermined path; characterized in that: the first body section (14) is a relatively long, slender main body section which includes narrow surfaces (30, 32) less than 2.54 cm (one inch) wide on opposite sides thereof defining the path and tapers at one end thereof to provide a workpiece-engaging portion (24) aligned with the narrow surfaces (30, 32); the second body section (16) is a relatively short, body section which includes narrow surfaces (92) on opposite sides thereof; guide means (50, 52, 54, 56, 100, 102) are disposed along the narrow surfaces of the first and second body sections (14
  • the present invention enables the aforementioned problems to be overcome.
  • the tool of the present invention in many ways is like a file in that the grip portion enables accurate and controlled manipulation of the workpiece engaging portion, and its relatively thin, sleek profile permits its application on detailed, intricate surfaces.
  • the removable abrasive strip permits alternate strips having different abrasive characteristics to be used to achieve specific desired workpiece surface features.
  • the guide means are laterally disposed, longitudinally extending sidewalls along the first and second body sections for aligning the strip with respect to the workpiece-engaging portion.
  • the tool also includes connecting means joining the first and second body sections, the connecting means allowing limited longitudinal movement between the first and second body sections.
  • the adjacent end of the second body section includes an outwardly projecting arm, and the adjacent end of the first body section includes axially extending openings dimensioned to receive in snap-locking manner that arm.
  • the tension means includes a biasing element disposed between the first and second sections for biasing such sections apart.
  • the tool is less than 22.86 cm (9 inches) in length and is intended to carry an abrasive strip less than 1.27 cm (0.5 inch) in width.
  • the body sections are comprised of an impact and chemically resistant plastics material.
  • the second body section includes a longitudinally extending arm which is received in sliding fashion in a longitudinally extending opening in the first section.
  • a lateral extending tab on the arm connects the sections and limits longitudinal movement therebetween.
  • a spring concentric about the longitudinally extending arm biases the sections longitudinally apart.
  • the side walls which define the handle portion project above the surface of the path a distance slightly greater than the intended thickness of the abrasive strip. In this respect, the walls not only align the strip with respect to the workpiece engaging portion, they likewise restrict engagement of the abrasive strip disposed on the handle portion from abrasive contact with the workpiece.
  • the workpiece engaging portion is generally wedge-shaped conveniently having one surface coplanar with the surface of the path along the handle portion, and the other surface generally oblique to the axis of the body.
  • the abrasive strip is disposed along the path wherein the resiliency of the biasing spring maintains the interior surface of the strip in contact with the surface of the path.
  • the spring means are operative to releasably hold the strip under tension in non-slipping relationship to the path.
  • the strip is movable however along the path to permit positioning unused abrasive surface level with the workpiece engaging portion of the tool. Accordingly, the present invention provides an abrasive tool having features similar to a swiss file together with additional benefits, such as having an abrasive surface which can be replaced to accommodate a specific application.
  • the tool of the present invention is suitable for sanding, buffing, or polishing flat, contoured or intricate surfaces, and can carry a removable abrasive strip mounted longitudinally thereabouts.
  • the abrasive strip can be repeatedly indexed to the workpiece engaging portion to ensure utilization of the entire abrasive surface of the strip.
  • the abrasive strip can be indexed or replaced quickly without removing or loosening any part of said tool.
  • the tool can be made lightweight, and inexpensive, and is easy to use.
  • FIGURE 1 shows a hand-held tool 10 constructed in accordance with the present invention for abrading, sanding, or buffing a workpiece (not shown).
  • tool 10 includes an elongated, generally rectangular, body generally designated 12 extending along an axis A.
  • Body 12 is comprised of a relatively long main body section 14 and a shorter body section 16 having adjacent ends 18, 20 respectively.
  • Section 14 and 16 are interconnected in a non-detachable manner to effect limited, longitudinal movement therebetween, and further include means biasing them apart.
  • An endless abrasive strip 22 is carried longitudinally about sections 14, 16 along a generally endless path P.
  • abrasive has and will be used throughout the application to describe strip 22. It will be understood, that the term refers to an abrading, smoothing or polishing surface.
  • abrading smoothing or polishing surface.
  • FIGURES 1 and 2 the relative position of surfaces and parts of tool 10 will be described with reference to the orientation shown in FIGURES 1 and 2, although it will be appreciated that the tool may be manipulated to any desired position relative to a workpiece.
  • Main body section 14 is generally rectangular in cross-section, and includes a workpiece engaging portion 24 at one end thereof. Relatively long, narrow section surfaces 30, 32 are provided respectively on the upper and lower extent of section 14.
  • Workpiece engaging portion 24 is generally wedge shaped and includes upper and lower work surfaces 34, 36 respectively.
  • lower surface 36 of wedge-shaped portion 24 is generally coplanar with section surface 32 and communicates therewith, while upper surface 34 is generally oblique with respect to axis A of tool 10.
  • work surfaces 34, 36 intersect to form a radiused point 38.
  • Wall members 40, 42 are provided on opposite sides of section 14 and extend from workpiece engaging portion 24 to end 18. Ends 44, 46 of wall members 40, 42 are radiused or smoothly contoured near workpiece engaging portion 24 to enable tool 10 to be used near obstructions without interference therefrom. As best seen in FIGURE 3, wall members 40, 42 include portions which extend beyond section surfaces 30, 32 thereby defining rails or guides 50, 52, 54, 56 which are laterally disposed with respect to surfaces 30, 32.
  • end 18 of body section 14 includes a generally flat surface 58 which is generally perpendicular to axis A of tool 10. Openings 60, 62 in surface 58 communicate with a surface 66 in a chamber or cavity 70 formed in section 14. Chamber 70 is one of several such cavities 72, 74, 76 disposed within body section 14. With the exception of chamber 70, the other cavities are provided primarily to reduce the weight of, and the amount of material used in, tool 10, and in and of themselves form no part of the present invention. Where openings 60, 62 intersect, a laterally facing generally annular surface 64 is defined. Opening 60 is larger than opening 62 and is axially aligned therewith. Opening 60 is generally cylindrical in shape, while opening 62 is partially cylindrical and include a flat portion 78, as best seen in FIGURE 3. A groove or depression 80 is disposed in surface 66 adjacent opening 62.
  • Section 16 is relatively short as compared to body section 14.
  • Section 16 is rectangular in cross-section and has a generally rounded or curved end 90 defining a curved or arcuate surface 92.
  • a flat surface 94 is provided at adjacent end 20.
  • Wall members 96, 98 are provided on opposite sides of section 16, which wall members extend outwardly beyond surface 92 and define guides or rails 100, 102 disposed laterally thereto, as seen in FIGURE 4.
  • Respective parts and surfaces of section 16 are dimensioned to be in longitudinal coplanar alignment with section 14.
  • An elongated stem or arm 104 extends perpendicularly from surface 94 of section 16.
  • Stem 104 is generally cylindrical in shape, but includes a flat portion 106 along a portion thereof. Portion 106 is dimensioned to be slidably received in opening 62 of body section 14. In this respect, flat portion 106 of stem 104 and flat portion 78 of opening 62 are oriented within body sections 16, 14 respectively to effect alignment therebetween.
  • the free end of stem 104 includes a tab 108 laterally extending to one side thereof. Tab 108 is generally inclined or angled back toward section 16 to provide a hook-like or barb-like configuration.
  • section 14 and 16 are assembled wherein stem 104 is slidably received in opening 62.
  • a spring 110 surrounding stem 104 is received in opening 60 with its ends engaging surfaces 64 and 94 to urge sections 14, 16 longitudinally apart. Separation of sections 14, 16 is limited by tab 108 engaging surface 66 in cavity 70.
  • body sections 14, 16 are preferably molded or otherwise formed of an impact and chemical resistant plastic.
  • plastic not only provides economy in manufacturing and light weight, it also allows for a snap-lock interconnection between sections 14, 16, thus providing an integral body assembly.
  • certain plastic material because of their yielding characteristics, permit stem 104 to be inserted through opening 62 in body section 14. To this end, the inclination of tab 108 facilitates such operation. Once inserted, tab 108 "snaps" laterally outward such that engagement between tab 108 and surface 66 prevents removal of stem 106 from opening 62. It has been found that insertion of stem 104 in hole 62 is easily accomplished if performed relatively soon after molding while the respective parts are still warm.
  • Strip 22 is an endless loop having an inner surface 120 and an outer surface 122.
  • Strip 22 may have an abrading, buffing, sanding or polishing outer surface 122, depending on the desired surface finish on the workpiece.
  • Strip 22 is dimensioned relative to body 12 to be maintained under tension by spring 110 wherein inner surface 120 is in contact with path P.
  • spring 110 is operative to releasably hold strip 22 in non-slipping relationship to path P, wherein strip 22 is movable along path P to locate an unused portion of outer surface 122 on workpiece engaging portion 24.
  • the width of strip 22 is approximately equal to the width of workpiece engaging portion 24.
  • rail or guides 50-56, 100 and 102 are laterally located on opposite sides of path P and project a predetermined distance outward therefrom. Primarily these guides align strip 22 along path P to ensure proper positioning thereof with respect to wedge-shaped workpiece engaging portion 24 and to prevent strip 22 from slipping or being forced off relatively narrow body 12.
  • the guides define a handle portion on tool 10.
  • guides 50-56, 100 and 102 extend above strip 22 such that engagement of outer surface 122 is not possible along this portion of the tool, thereby defining the handle portion.
  • a hand held tool for abrading, polish, or sanding a workpiece which tool, because or its workpiece engaging 24 and handle portion, can be manipulated, controlled and used much like a precision swiss file.
  • the tool according to the present invention permits modification of the abading surface by replacement of strip 22. It is likewise inexpensive and easy to fabricate.
  • a tool according to the present invention will preferably be dimensioned to be easily held by hand and at the same time have a workpiece engaging portion which can be easily manipulated against intricate or small work surfaces.
  • the embodiment heretofore disclosed is approximately 16.5cm (6.5 inches) long and 0.94 cm (0.375 inches) in height and width, wherein strip 22 is approximately 0.62cm (0.250 inches) wide. It will be appreciated that these dimensions are for the purpose of illustration only, and are not intended to limit the scope of the disclosed invention.
  • Workpiece engaging portion 24 may assume other wedge-shaped configurations than that shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (6)

  1. Handwerkzeug zum Abschleifen, Polieren oder Schmirgeln einer ebenen oder konturierten Oberfläche, wobei das Handwerkzeug folgendes aufweist:
    einen Körper zum Tragen eines entfernbaren, flexiblen, endlosen, abschleifenden Streifens in Längsrichtung um den Körper, und
    Spannmittel zum Halten des Streifens unter Spannung auf dem Körper;
    wobei der Körper eine Körperanordnung ist, die erste und zweite Körperabschnitte aufweist, welche zum Tragen des Streifens entlang eines vorbestimmten Pfads vorgesehen sind; und
    wobei die Spannungsmittel an dem anderen Ende des ersten Körperabschnitts angeordnet sind, um den Streifen lösbar unter Spannung in Kontakt mit dem Pfad zu halten durch Vorspannen der ersten und zweiten Körperabschnitte weg voneinander;
    dadurch gekennzeichnet, daß:
    der erste Körperabschnitt ein relativ langer, schlanker Hauptkörperabschnitt ist, der auf gegenüberliegenden Seiten davon, die den Pfad definieren, schmale Oberflächen umfaßt, die weniger als 2,54 cm (1 Zoll) breit sind, und an einem Ende davon sich verjüngt, um einen Werkstückeingriffsteil vorzusehen, der mit den schmalen Oberflächen ausgerichtet ist;
    der zweite Körperabschnitt ein relativ kurzer Körperabschnitt ist, der schmale Oberflächen auf gegenüberliegenden Seiten davon umfaßt;
    Führungsmittel entlang der schmalen Oberflächen der ersten und zweiten Körperabschnitte angeordnet sind zum Ausrichten des Streifens bezüglich des Werkstückeingriffsteils und
    das Werkzeug eine Gesamtlänge besitzt, die mindestens 10mal größer ist als die Breite der schmalen Oberflächen.
  2. Werkzeug gemäß Anspruch 1, wobei die Führungsmittel seitlich angeordnete, sich in Längsrichtung erstreckende Seitenwände entlang der ersten und zweiten Körperabschnitte sind zum Ausrichten des Streifens bezüglich des Werkstückeingriffsteils.
  3. Werkzeug gemäß Anspruch 1 oder 2, wobei das Werkzeug ferner Verbindungsmittel umfaßt, die die ersten und zweiten Körperabschnitte verbinden, wobei die Verbindungsmittel eine beschränkte Längsbewegung zwischen den ersten und zweiten Körperabschnitten gestatten.
  4. Werkzeug gemäß Anspruch 3, wobei das benachbarte Ende des zweiten Körperabschnitts einen nach außen ragenden Arm umfaßt, und wobei das benachbarte Ende des ersten Körperabschnitts sich axial erstreckende Öffnungen umfaßt, die so dimensioniert sind, um den Arm in einer Schnappverschlußweise aufzunehmen.
  5. Werkzeug gemäß einem der vorhergehenden Ansprüche, wobei die Spannungsmittel ein Vorspannelement umfassen, das zwischen den ersten und zweiten Abschnitten angeordnet ist, um die Abschnitte weg voneinander vorzuspannen.
  6. Werkzeug gemäß einem der vorhergehenden Ansprüche, wobei das Werkzeug weniger als 22,86 cm (9 Zoll) lang ist und einen abschleifenden Streifen tragen soll, der weniger als 1,27 cm (0,5 Zoll) breit ist.
EP88902727A 1986-03-28 1988-02-29 Schleifwerkzeug Expired - Lifetime EP0357621B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US84554986A 1986-03-28 1986-03-28
PCT/US1988/000617 WO1989008008A1 (en) 1986-03-28 1988-02-29 Abrasive tool

Publications (3)

Publication Number Publication Date
EP0357621A1 EP0357621A1 (de) 1990-03-14
EP0357621A4 EP0357621A4 (en) 1991-07-03
EP0357621B1 true EP0357621B1 (de) 1994-01-26

Family

ID=37338220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88902727A Expired - Lifetime EP0357621B1 (de) 1986-03-28 1988-02-29 Schleifwerkzeug

Country Status (7)

Country Link
EP (1) EP0357621B1 (de)
JP (1) JPH03501829A (de)
AT (1) ATE100750T1 (de)
AU (1) AU609799B2 (de)
CA (1) CA1307669C (de)
DE (1) DE3887515T2 (de)
WO (1) WO1989008008A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7621802B2 (en) 2002-08-26 2009-11-24 3M Innovative Properties Company Corner sanding sponge

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US713199A (en) * 1902-03-31 1902-11-11 Omar Loyal Brainard Hand-buffer.
US1274928A (en) * 1918-05-02 1918-08-06 Henry Mueller Emery-cloth holder.
US2457466A (en) * 1945-11-28 1948-12-28 Atto N Hanna Hand-operated abrader
CH272088A (de) * 1947-02-11 1950-11-30 Dent Ott Walter Dr Med Röntgenapparatur.
US2493852A (en) * 1948-06-01 1950-01-10 Merit Products Inc Sanding block
US2531588A (en) * 1949-05-17 1950-11-28 Stucker Oscar Sander block
US3063208A (en) * 1961-03-17 1962-11-13 William A Bell Sanding block
US3106806A (en) * 1962-04-02 1963-10-15 Alma A Hutchins Work smoothing tool
US3170272A (en) * 1963-06-03 1965-02-23 Richard C Burnham Contour abrading machine and method
US3465479A (en) * 1966-07-27 1969-09-09 Murphy Ind Inc G W Belt sander
US3510991A (en) * 1968-04-01 1970-05-12 Stuart F Bowen Sanding block
US3871141A (en) * 1973-05-14 1975-03-18 Mario J Bonapace Knife sharpener and edge straightener
US4525959A (en) * 1981-05-26 1985-07-02 Ziebarth Warren S Abrasive finishing tool

Also Published As

Publication number Publication date
AU1488388A (en) 1989-09-22
DE3887515T2 (de) 1994-08-18
ATE100750T1 (de) 1994-02-15
AU609799B2 (en) 1991-05-09
JPH03501829A (ja) 1991-04-25
EP0357621A1 (de) 1990-03-14
DE3887515D1 (de) 1994-03-10
WO1989008008A1 (en) 1989-09-08
CA1307669C (en) 1992-09-22
EP0357621A4 (en) 1991-07-03

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