US3638362A - Portable grinder apparatus - Google Patents

Portable grinder apparatus Download PDF

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Publication number
US3638362A
US3638362A US57643A US3638362DA US3638362A US 3638362 A US3638362 A US 3638362A US 57643 A US57643 A US 57643A US 3638362D A US3638362D A US 3638362DA US 3638362 A US3638362 A US 3638362A
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United States
Prior art keywords
working plate
plane
plate
suction
set forth
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Expired - Lifetime
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US57643A
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English (en)
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Gottlieb Stoll
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/105—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with oscillating tools

Definitions

  • ABSTRACT A portable grinding apparatus has a working plate movably mounted on a casing and oscillatable by a motor carried by the casing.
  • the plate includes a top member having downwardly directed flanges and a bottom member adapted to carry on its lower surface on abrasive material and closing the open bottom of the top member.
  • a pipe for connection to a suction device extends through the top member into the interior of the space between the top and bottom members.
  • the bottom member and the grinding material have aligned holes to allow the flow of air and entained chips through the space to the outlet pipe.
  • the present invention relates to a portable grinder apparatus and more particularly to an apparatus in which a housing encases a drive motor which sets into oscillating movement a working plate which is movably suspended on said housing and which carries on its lower surface an easily exchangeable grinding medium, such as abrasive paper or a web of grinding cloth, the said oscillating movement being contained in a single plane, and in which the produced chips are removed by a suction device.
  • a housing encases a drive motor which sets into oscillating movement a working plate which is movably suspended on said housing and which carries on its lower surface an easily exchangeable grinding medium, such as abrasive paper or a web of grinding cloth, the said oscillating movement being contained in a single plane, and in which the produced chips are removed by a suction device.
  • the primary object of the present invention is to provide a grinding apparatus of the kind with only small space requirements and with the aid of which also small angles and comers can be worked wherein the outer edge of abrasive paper is allowed to reach right into angles, corners or the like.
  • Another object of the invention is to provide a portable grinder apparatus of the type described above in which the working plate comprises a hollow space within itself, the latter being interconnected on the one hand with passage openings projecting downwardly through the bottom of the working plate and also through the abrasive paper and, on the other hand, with a suction opening connecting it with the above mentioned suction device.
  • Yet another object of the invention is to provide a device of the kind in question in which all components of the suction device are extremely simple and obtainable at low cost.
  • a still further object of the invention is to provide a device of the character described with which the suction effect is also considerably improved due to the shorter suction paths, which are of importance flat when working even surfaces but still more when working curved surfaces, in which case the suction paths of the device of the invention are even shorter, which again considerably increases the suction power.
  • Another object of the invention is to provide a device of the above-mentioned character with which the arrangement can be used with portable grinders of any type, wherein the suction device may be part of the portable grinder and driven by the latters own drive motor, or else a separate, independently driven suction device which is connected to the suction opening of the working plate through an essentially flexible suction line.
  • the suction devices may take any form, from domestic vacuum cleaners to industrial vacuum cleaners, the selection of the device and, thus, the suction power depending on the material to be ground in each individual case.
  • FIG. 1 is a side elevation of a portable grinder according to the invention with a detached sheet of abrasive paper;
  • FIG. 2 is a partial vertical cross section along the longitudinal axis of the grinder shown in FIG. I and FIG. 3 is a diagrammatic representation of and a vertical cross section through part of the grinder shown in FIG. 1.
  • a portable grinder 1 comprises a drive motor enclosed in a housing 2, the said drive motor setting a working plate 3 which is movably suspended on the said housing 2 into an essentially straight-lined or slightly curved oscillating movement within plane 4, in which a grinding agent, such as a sheet of abrasive paper or grinding cloth 5 is located which rests on the lower surface A of the working plate 3 when the device 1 is in operating condition and which is held against the working plate by clamping means 6 which provide for easy exchangeability.
  • a knob 7 is mounted on the housing 2 at the front end of the device 1, while the rear side of the housing carries a rigid shank or handle 8 which serves to hold the device, as is the case also with knob 7.
  • the working plate 3 comprises a cavity 9 opening on the one hand on the bottom surface A of the working plate 3 through passage openings. 11, 11' or bores extending essentially perpendicularly to the plane of the abrasive paper 5 and penetrating through the latter at l0, l0, and being connected on the other hand through a suction opening 12 with a suction device not shown in the drawing.
  • the said suction device may either be part of the grinder l and driven by the latter's own drive motor, or else consist of a separate unit which has its own drive and is, therefore, driven independently of the grinder 1 and which is connected to the suction opening 12 of the working plate 3.
  • connection between the suction device and the grinder may consist, for instance, of a flexible suction line 13.
  • the cavity 9 extends essentially over the whole face of the working plate 3.
  • the passage openings 10, 10', 11, 11, are equally spaced along two lines arranged symmetrically in relation to the longitudinal middle axis of the working plate 3 and in parallel relation to the longitudinal edges of the working plate 3, the suction opening 12 of the cavity 9 in the working plate 3, which is connected to the suction device, extending conveniently through the longitudinal middle plane of the working plate 3 rectangular to the plane 4 of the abrasive paper 5, and being arranged within the rear portion of the working plate 3 beneath the handle 8 mounted on the housing 2 and being contained within the upper surface B turned away from the abrasive paper 5 of the working plate 3.
  • the suction opening 12 may be provided either at a right angle to the plane 4 or at an angle different from a right angle in relation to the rear portion of the working plate 3 extending underneath the handle 8.
  • a tubular connection socket 19 is provided on the working plate 3, which forms an extension of the suction opening 12 in the direction towards the upper surface B of the working plate 3 and which serves to connect with the suction line 13.
  • the working plate 3 is subdivided along a plane 20 essentially parallel to the plane 4 and comprises on the one hand an upper portion 21 which is suspended and mounted on the housing 2 of the grinder I and which consists of an essentially box-shaped frame 23 which is open towards the plane of division 20 and which contains on its upper surface the suction opening 12, and comprises, on the other hand, a bottom portion 22 which is detachably connected to the upper portion 21 along the plane of division 20 and which comprises a flat plate 24 consisting, for instance, of metal such as steel or aluminum which rests on the frame edges 23 facing the plane of division 20, the said plate bearing against the frame along the frame edges, whereby the cavity 9 comprised between the frame 23 and the plate 24, is sealed, the said plate being further detachably connected, for instance, by means of screws 25 inserted from the upper frame surface B.
  • the plate 24 comprised in the bottom portion 22 is provided with passage bores 26, 26 which also extend through the abrasive paper 5 at I0, 10 (FIG. 3) and which interconnect the cavity 9 existing between the frame 23 and the plate 24 with the bottom surface A of the working plate 3 and, thus, with the area in which chips are encountered during the grinding of workpieces.
  • the plate 24 forming the bottom portion 22 has on its surface opposite the cavity 9 a rigidly connected, for instance, glued-on plate 27 of resilient material, such as rubber or plastic, which carries on its surface opposite the cavity 9 a web of abrasive paper 5 (FIG.
  • the stiff, for instance, metallic plate 24, the resilient plate 27 and the abrasive paper 5 being provided with flush passage bores 26, 26', 1 l, l 1' and 10, 10, which interconnect the cavity 9 existing between the upper portion 21 and the bottom portion 22 with the bottom surface A of the abrasive paper 5 carrying the abrasive grain and which thereby serve to open the cavity 9 to the exterior on the side of the surface A.
  • At least part of the flush passage bores 10, 1 l, 26 which are provided essentially perpendicularly relative to the plane 4 of the abrasive paper, is provided with shunt openings 28, 28' extending from one side (edges l5, 16) of the bottom portion 22 into the passage bore 10, ll, 26, which shunt openings serve to direct air drawn off the zones adjacent the sides of the working plate 3 (arrows 29, 29 in FIG. 3) into the associated passage bores.
  • air containing grinding chips is drawn off from the bottom surface A through the passage bores 10, ll, 26 or 10', ll, 26 (arrows 30, 30).
  • each passage opening 10, 11, 26 or l0, ll, 26' is provided with such a shunt opening 28, 28'.
  • the shunt opening 28, 28' are provided between the resilient plate 27 and the abrasive paper on that surface of the said resilient plate which faces the abrasive paper 5.
  • the said shunt openings take thereby essentially the form of a groove which extends essentially within the plane 4 formed by the abrasive paper 5 and whose sides diverge towards the abrasive paper.
  • the said shunt openings 28, 28' serve the purpose to draw off any chips that may be encountered at the sides of the working plate 3 and, at the same time, to prevent any excessive adhesion between the abrasive paper 5 and the workpiece surfaces caused by the vacuum existing in the passage bores 10, ll, 26 or I0, 11, 26.
  • a portable grinding apparatus comprising, in combination, a casing, a driving motor within said casing having a drive shaft, a working plate movably mounted and supported on said casing so as to be movable within a single plane, s driving connection between said drive shaft of said driving motor and said working plate, said driving motor causing said working plate to perform an oscillating movement within a plane rectangular to the axis of said drive shaft, a grinding element, said grinding element being mounted on the underside of said working plate turned away from said driving motor, said grinding element being releasably attached to said working plate, a suction device for sucking up the chips produced during grinding operation, means connecting said suction device with at least a portion of the space adjacent the said working plate, wall means cooperating with said working plate and forming therewith a hollow space, through bores in said working plate, said through bores extending from said hollow space to the underside of said working plate turned away from said drive motor, thereby enabling said hollow space to communicate with the outer atmosphere and the space adjacent the underside
  • suction device is a separate, independent] driven device, said apparatus including, connected to the sal suction opening, a flexible suction line.
  • suction opening is located within the rear portion of the working plate and on the upper surface opposite the grinding elements and extends through the longitudinal middle plane of the working plate which forms a right angle with the plane of the grinding element, the longitudinal middle plane forming the plane of symmetry of the suction opening.
  • the plate forming the bottom portion comprises, on its surface opposite the cavity, a rigidly mounted plate of resilient material, which carries on its surface opposite the cavity the grinding element which comprises a web of abrasive paper, clamping members mounted on the frame releasably engaging said web, and in that the flat plate as well as the resilient plate and the abrasive paper are provided with aligned passage bores, which connect the cavity existing between the upper portion and the bottom portion with the bottom surface of the abrasive paper.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US57643A 1969-07-29 1970-07-23 Portable grinder apparatus Expired - Lifetime US3638362A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691938350 DE1938350A1 (de) 1969-07-29 1969-07-29 Handschleifgeraet

Publications (1)

Publication Number Publication Date
US3638362A true US3638362A (en) 1972-02-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
US57643A Expired - Lifetime US3638362A (en) 1969-07-29 1970-07-23 Portable grinder apparatus

Country Status (5)

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US (1) US3638362A (de)
AT (1) AT299006B (de)
CH (1) CH505667A (de)
DE (1) DE1938350A1 (de)
FR (1) FR2053261B1 (de)

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3785092A (en) * 1971-12-28 1974-01-15 A Hutchins Abrading tool having suction system for collecting abraded particles
US3824689A (en) * 1972-08-21 1974-07-23 A Hutchins Piercing of air suction holes in abrasive sheet material
US3840976A (en) * 1972-08-21 1974-10-15 A Hutchins Method of piercing holes in sanding discs
US3854897A (en) * 1971-10-01 1974-12-17 K Attinger Hand grinder with a drive motor, designed as a compressed-air motor
US3866304A (en) * 1972-08-21 1975-02-18 Alma A Hutchins Method of piercing air suction holes in abrasive sheet material
US3932966A (en) * 1974-03-26 1976-01-20 Bill Peter Philip Nederman Abrasive disc
US4071981A (en) * 1976-12-03 1978-02-07 Champayne Roy J Portable abrading machine with dust collecting system
US4158935A (en) * 1976-09-27 1979-06-26 La Francaise Metallurgie Sanding apparatus
US4164101A (en) * 1977-03-18 1979-08-14 La Francaise Metallurgie Sanding head including a dust extracting shaft casing
USD272511S (en) 1981-03-26 1984-02-07 Ryobi Ltd. Electric sander
US4531329A (en) * 1983-10-03 1985-07-30 Dynabrade, Inc. Lip seal shroud
US4598500A (en) * 1985-07-31 1986-07-08 Faraudo Julio P Dust collector for air sander
US4759155A (en) * 1987-03-06 1988-07-26 Shaw Christopher J Particle collecting sander
US4839995A (en) * 1988-05-02 1989-06-20 Hutchins Manufacturing Company Abrading tool
US4937984A (en) * 1989-02-23 1990-07-03 Taranto Thomas F Vacuum sander
US5036627A (en) * 1989-06-28 1991-08-06 David Walters Dustless sanding device
US5367839A (en) * 1991-01-23 1994-11-29 Henkel Kommanditgesellschaft Auf Aktien (Henkel Kgaa) Abrasive sheets
US5597347A (en) * 1995-02-09 1997-01-28 Porter-Cable Corporation Sander vacuum housing and pad frame system
US5743791A (en) * 1995-02-09 1998-04-28 Porter Cable Corporation Sanding system
US5759094A (en) * 1995-02-09 1998-06-02 Porter-Cable Corporation In-line detail sander
US6059644A (en) * 1998-11-18 2000-05-09 3M Innovative Properties Company Back-up pad for abrasive articles and method of making
WO2002072313A1 (en) * 2001-03-12 2002-09-19 Guido Valentini Operating plate with a basically circular shape for portable tools
US6988940B1 (en) 2004-08-19 2006-01-24 Bruce Taylor Dustless sander
US7033259B1 (en) 2005-04-13 2006-04-25 Shop Vac Corporation Hand sander vacuum attachment
US20080081546A1 (en) * 2006-09-29 2008-04-03 3M Innovative Properties Company Dust vacuuming abrasive tool
US7473165B1 (en) 2006-05-30 2009-01-06 Thomas Berryhill Vacuum-assisted sanding block
US20090227188A1 (en) * 2008-03-07 2009-09-10 Ross Karl A Vacuum Sander Having a Porous Pad
DE102010012007A1 (de) * 2010-03-15 2011-09-15 C. & E. Fein Gmbh Schleifplatte
US20130333176A1 (en) * 2012-06-14 2013-12-19 Sean Anthony Macken Device and associated crack repair system
US20140024301A1 (en) * 2008-08-20 2014-01-23 Black & Decker Inc. Power tool with interchangeable tool head
US9421682B2 (en) 2011-07-18 2016-08-23 Black & Decker Inc. Multi-head power tool with reverse lock-out capability
US20160303712A1 (en) * 2015-04-13 2016-10-20 Stanley Middle East FZE Sanding Tool
CN107139049A (zh) * 2017-06-19 2017-09-08 湖州雅洁橱柜有限公司 一种木制家具原料去皮打磨装置
US9956677B2 (en) 2013-05-08 2018-05-01 Black & Decker Inc. Power tool with interchangeable power heads

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4296572A (en) * 1978-03-17 1981-10-27 Pedro Quintana Dust removing attachment device for automatic air files
DE3010838A1 (de) * 1980-03-21 1981-10-01 Robert Bosch Gmbh, 7000 Stuttgart Als handwerkzeugmaschine ausgebildeter schwingschleifer
DE3742038A1 (de) * 1987-12-11 1989-06-22 Gerd Braasch Schleifkoerper fuer die bearbeitung von oberflaechen, insbesondere holzoberflaechen
DE8802927U1 (de) * 1987-12-15 1988-05-05 Braasch, Gerd, 4475 Sögel Schleifelement für einen Schleifkörper
DE59410331D1 (de) * 1994-02-03 2003-11-27 Bosch Gmbh Robert Handwerkzeugmaschine zur Flächenbearbeitung
DE19800025B4 (de) 1997-02-28 2018-06-21 Robert Bosch Gmbh Schleifplatte für eine Schleifhandwerkzeugmaschine mit Staubabsaugung
CN107932273A (zh) * 2017-12-05 2018-04-20 高峰 一种用于汽车加工的便捷式吸尘抛光机
CN109366275B (zh) * 2018-10-15 2024-03-19 宁波市科曼电动工具有限公司 一种打磨机平整度控制结构

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2499933A (en) * 1949-08-04 1950-03-07 Joseph F Smul Surface cleaning attachment
US3148487A (en) * 1963-06-12 1964-09-15 Milt Wilhelm Sanding device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2499933A (en) * 1949-08-04 1950-03-07 Joseph F Smul Surface cleaning attachment
US3148487A (en) * 1963-06-12 1964-09-15 Milt Wilhelm Sanding device

Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3854897A (en) * 1971-10-01 1974-12-17 K Attinger Hand grinder with a drive motor, designed as a compressed-air motor
US3785092A (en) * 1971-12-28 1974-01-15 A Hutchins Abrading tool having suction system for collecting abraded particles
US3824689A (en) * 1972-08-21 1974-07-23 A Hutchins Piercing of air suction holes in abrasive sheet material
US3840976A (en) * 1972-08-21 1974-10-15 A Hutchins Method of piercing holes in sanding discs
US3866304A (en) * 1972-08-21 1975-02-18 Alma A Hutchins Method of piercing air suction holes in abrasive sheet material
US3932966A (en) * 1974-03-26 1976-01-20 Bill Peter Philip Nederman Abrasive disc
US4158935A (en) * 1976-09-27 1979-06-26 La Francaise Metallurgie Sanding apparatus
US4071981A (en) * 1976-12-03 1978-02-07 Champayne Roy J Portable abrading machine with dust collecting system
US4164101A (en) * 1977-03-18 1979-08-14 La Francaise Metallurgie Sanding head including a dust extracting shaft casing
USD272511S (en) 1981-03-26 1984-02-07 Ryobi Ltd. Electric sander
US4531329A (en) * 1983-10-03 1985-07-30 Dynabrade, Inc. Lip seal shroud
US4598500A (en) * 1985-07-31 1986-07-08 Faraudo Julio P Dust collector for air sander
US4759155A (en) * 1987-03-06 1988-07-26 Shaw Christopher J Particle collecting sander
US4839995A (en) * 1988-05-02 1989-06-20 Hutchins Manufacturing Company Abrading tool
US4937984A (en) * 1989-02-23 1990-07-03 Taranto Thomas F Vacuum sander
US5036627A (en) * 1989-06-28 1991-08-06 David Walters Dustless sanding device
US5367839A (en) * 1991-01-23 1994-11-29 Henkel Kommanditgesellschaft Auf Aktien (Henkel Kgaa) Abrasive sheets
US6257969B1 (en) 1995-02-09 2001-07-10 Porter-Cable/Delta In-line sander
US20060116058A1 (en) * 1995-02-09 2006-06-01 Bosten Donald R In-line sander
US5759094A (en) * 1995-02-09 1998-06-02 Porter-Cable Corporation In-line detail sander
US6042460A (en) * 1995-02-09 2000-03-28 Porter-Cable Corporation In-line sander
US20090104857A1 (en) * 1995-02-09 2009-04-23 Black & Decker Inc. In-line sander
US5597347A (en) * 1995-02-09 1997-01-28 Porter-Cable Corporation Sander vacuum housing and pad frame system
US5743791A (en) * 1995-02-09 1998-04-28 Porter Cable Corporation Sanding system
US7438629B2 (en) 1995-02-09 2008-10-21 Black & Decker Inc. In-line sander
US8167683B2 (en) 1995-02-09 2012-05-01 Black & Decker Inc. In-line sander
US6059644A (en) * 1998-11-18 2000-05-09 3M Innovative Properties Company Back-up pad for abrasive articles and method of making
US6361424B1 (en) 1998-11-18 2002-03-26 3M Innovative Properties Company Back-up pad for abrasive articles and method of making
WO2002072313A1 (en) * 2001-03-12 2002-09-19 Guido Valentini Operating plate with a basically circular shape for portable tools
US6988940B1 (en) 2004-08-19 2006-01-24 Bruce Taylor Dustless sander
US7033259B1 (en) 2005-04-13 2006-04-25 Shop Vac Corporation Hand sander vacuum attachment
US7473165B1 (en) 2006-05-30 2009-01-06 Thomas Berryhill Vacuum-assisted sanding block
US20080081546A1 (en) * 2006-09-29 2008-04-03 3M Innovative Properties Company Dust vacuuming abrasive tool
US20090227188A1 (en) * 2008-03-07 2009-09-10 Ross Karl A Vacuum Sander Having a Porous Pad
US9724799B2 (en) 2008-08-20 2017-08-08 Black & Decker Inc. Power tool with interchangeable tool head
US20140024301A1 (en) * 2008-08-20 2014-01-23 Black & Decker Inc. Power tool with interchangeable tool head
US8821220B2 (en) * 2008-08-20 2014-09-02 Black & Decker Inc. Power tool with interchangeable tool head
US10906155B2 (en) 2008-08-20 2021-02-02 Black & Decker Inc. Power tool with interchangeable tool head
DE102010012007A1 (de) * 2010-03-15 2011-09-15 C. & E. Fein Gmbh Schleifplatte
US9421682B2 (en) 2011-07-18 2016-08-23 Black & Decker Inc. Multi-head power tool with reverse lock-out capability
US20130333176A1 (en) * 2012-06-14 2013-12-19 Sean Anthony Macken Device and associated crack repair system
US9956677B2 (en) 2013-05-08 2018-05-01 Black & Decker Inc. Power tool with interchangeable power heads
US10661428B2 (en) 2013-05-08 2020-05-26 Black & Decker Inc. Power tool with interchangeable tool heads
US20160303712A1 (en) * 2015-04-13 2016-10-20 Stanley Middle East FZE Sanding Tool
CN107139049A (zh) * 2017-06-19 2017-09-08 湖州雅洁橱柜有限公司 一种木制家具原料去皮打磨装置

Also Published As

Publication number Publication date
FR2053261A1 (de) 1971-04-16
DE1938350A1 (de) 1971-02-11
FR2053261B1 (de) 1973-03-16
CH505667A (de) 1971-04-15
AT299006B (de) 1972-04-15

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