EP0267993A1 - Schutzhaube für Handschleifer - Google Patents

Schutzhaube für Handschleifer Download PDF

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Publication number
EP0267993A1
EP0267993A1 EP86308958A EP86308958A EP0267993A1 EP 0267993 A1 EP0267993 A1 EP 0267993A1 EP 86308958 A EP86308958 A EP 86308958A EP 86308958 A EP86308958 A EP 86308958A EP 0267993 A1 EP0267993 A1 EP 0267993A1
Authority
EP
European Patent Office
Prior art keywords
segment
shield
top wall
abrading
skirt
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.)
Withdrawn
Application number
EP86308958A
Other languages
English (en)
French (fr)
Inventor
Jerome Roestenberg
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.)
Individual
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
Priority to US06/764,041 priority Critical patent/US4622782A/en
Application filed by Individual filed Critical Individual
Priority to EP86308958A priority patent/EP0267993A1/de
Publication of EP0267993A1 publication Critical patent/EP0267993A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools
    • 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
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools

Definitions

  • This invention relates to a vacuum attachment for an abrading machine such as a portable rotary sander.
  • This invention particularly relates to a vacuum shield for enclosing, and removing dust generated by, the abrasive wheel of a rotary sander while not interfering with the use of the sander.
  • Vacuum hoods or shields for tools are well known. See, for example, US Patents 3,673,744, 3,785,092, 3,824,745, 3,837,383, 3,935,678, 4,071,981, 4,135, 334, 4,145,848 and 4,328,645.
  • the interiors of such shields have been connected to one or more vacuum hoses which draw off dust generated within the shields by the abrading machines.
  • a vacuum shield for an abrading part of an abrading machine comprising a generally planar top wall mounted on the abrading machine and overlying the abrading part of the abrading machine; the top wall of the shield being made of a rigid transparent material and comprising at least a first segment and a second segment; the first segment having a first hole therein, through which the abrading part can be supported and driven by the abrading machine; the first segment also having a plurality of second holes therein, each second hole being connected to a vacuum hose on top of the top wall and providing pneumatic communication through the top wall between the hose and the abrading part; and the second segment being pivotally connected to the first segment for upward pivotal movement of the second segment about its connection to the first segment; and also comprising a flexible skirt depending from the peripheral edge of the top wall and extending substantially continuously along the entire length of the peripheral edge of the top wall; the skirt substantially surrounding horizontally the abrading part of the abrading machine, even when the second segment
  • the shield of this invention can be easily attached to the abrading machine and, in use, allows the surface being abraded to be easily viewed.
  • the shield also allows the abrading part of the machine to reach every part of the surface, being abraded, while the dust generated by the abrading machine is continuously removed by the vacuum hoses connected to the shield.
  • FIG. 1 Shown schematically in Figures 1-3 is a conventional portable, pneumatically powered, rotary sander, generally 10.
  • a conventional portable, pneumatically powered, rotary sander On the bottom of the sander 10 is a conventional, generally round, rotatably abrasive wheel 12.
  • a conventional abrasive e.g. a sandpaper disc
  • the top of the wheel 12 is detachably mounted on the bottom of a rotatable vertical shaft 14 (e.g.
  • the shaft 14 is connected to a conventional air driven rotary motor (not shown) in a housing 16 above the wheel 12.
  • the motor is connected to a conventional source of compressed air (not shown) through a handle 18 on the housing 16.
  • the motor is activated by a conventional trigger 20 connected to the housing 16 above the handle 18.
  • a vacuum shield of this invention is mounted on the sander 10 so that the shield covers the top and sides of the abrasive wheel 12.
  • the shield 22 has a generally planar top wall 24 overlying the wheel 12.
  • the top wall 24 has the generally round configuration of the wheel 12 but a somewhat larger diameter than the wheel 12 so that the peripheral edge 25 of the top wall 24 lies wholly outside the circumference of the wheel 12.
  • the shield 22 also has a generally cylindrical, flexible skirt 26 that depends from the peripheral edge 25 of the top wall 24 and extends substantially continuously along the entire length of the peripheral edge 25 of the top wall 24.
  • the skirt 26 serves as a substantially continuous barrier about the peripheral edge 25 of the top wall 24 to the escape of dust from the shield 22 during use of the sander 10.
  • the location of the bottom 27 of the skirt 26, relative to the bottom surface 13 of the wheel 12, is not critical but it is preferred that the skirt bottom 27 be substantially parallel to the bottom surface 13 of the wheel 12. It is also preferred that the skirt bottom 27 not be spaced substantially above the bottom surface 13 of the wheel 12 so that, in use of the shield 22, the skirt bottom 27 rests on the surface being abraded by the abrasive bottom surface 13 of the wheel 12 of the sander 10.
  • the top wall 24 of the shield 22 is preferably made from a rigid transparent material, for example, a clear plastic such as methacrylate polymer, a polystyrene or an ABS copolymer.
  • the skirt 26 is preferably made of a flexible material whch will allow substantially the entire length of the bottom 27 of the skirt to be pressed against, and conform to, the surface being abraded with the sander 10 without scratching the surface being abraded or allowing substantial amounts of dust to escape from the interior of the shield 22 through gaps between the surface being abraded and the skirt bottom 27.
  • the skirt 26 can be made from a bristle brush or an elastomeric member such as a soft rubber blade or a thin rubber tubing, which extends lengthwise substantially continuously along the peripheral edge 25 of the top wall 24.
  • the top wall 24 of the shield 22 comprises at least two separate segments 28 and 30, one segment 28 preferably forming the front portions of the top wall 24 and the other segment 30 forming the remaining rear portions of the top wall 24.
  • the front and rear segments 28 and 30 be pivotally connected to each along a line 32 that is substantially parallel to the front of the shield 22 between the front of the rear segment 30 and th e rear of the front segment 28.
  • the segments 28 and 30 of the top wall 24 are connected by means of two hinges 34 about the line 32 between the segments.
  • the front segment 28 can be pivoted upwardly about the front of the rear segment 30 to allow the bottom surface 13 of the abrasive wheel 12 to reach a surface which would not have been accessible without the front segment 28 pivoting upwardly out of the way.
  • the front segment 28 can be pivoted upwardly when the bottom 27 of its shirt 26 has been urged into an elevated portion of a surface being abraded or when the front of the front segment 28 has been urged against a surface perpendicular to a surface being abraded.
  • the skirt 26 when the front segment 28 is pivoted upwardly in this way, it is preferred that the skirt 26 continue to serve as a substantially continuous barrier about the periphery of the top wall 24, substantially surrounding horizontally the abrasive wheel 12 to prevent the escape of dust generated within the shield.
  • the shirt 26 be made of a continuous elastomeric material to asure that little or no dust can escape from the shield 22, through gaps formed between the front and rear segments 28 and 30, when the first segment 28 pivots upwardly about the rear segment 30.
  • the hinges 34 are also provided with conventional stops which limit the upward pivot movement of the front segment 28 about the front of the rear segment 30.
  • a pair of springs 36 are preferably connected to the front and rear segments 28 and 30 of top wall 24 adjacent the hinges 34.
  • the springs 36 urge the front segment 28 to pivot downwardly about the front of the rear segment 30 when the front segment 28 has pivoted upwardly (e.g. by being urged against a perpendicular surface in front of the shield 22).
  • a plurality of vacuum holes 38 are provided in the rear segment 30 of the top wall 24 of the shield 22, spaced about the circumference of the top wall 24.
  • Each hole 38 is connected to one end of a conventional vacuum hose 40, and the other end of each hose 40 is connected to a conventional vacuum pump (not shown).
  • the vacuum holes are preferably spaced substantially equidistantly about the centre of the top wall 24 between the abrasive wheel 12 and the skirt 26 and are adapted to provide pneumatic communication between the interior of the shield 22 and the vacuum pump through the vaccum hoses 40 so that dust, generated within the shield 22, can be removed by the vacuum pump.
  • the rear segment 30 of the top wall 24 of the shield 22 has a central hole 42 through which the shaft 14 can extend between the motor of the sander 10 and the abrasive wheel 12 to support and drive the wheel 12.
  • the size of the central hole 42 is not critical, it is preferred that the central hole 42 be substantially smaller than the wheel 12 to minimize the amount of dust which can escape through the central hole from the shield 22.
  • the plurality of vacuum holes 38 that are provided in the top wall 24 between the wheel 12 and the skirt 26 and that are connected to the hoses 40 and a vacuum pump (not shown) can remove virtually all of the dust generated by the operation of the abrasive wheel 12 within the shield 22 and will allow little or no dust to escape from the central hole 42 so long as the central hole 42 is substantially smaller than the wheel 12.
  • the method of mounting the shield 22 on the sander 10 also is not critical. It is preferred that the shield 22 be mounted so that it can pivot about the sander 10 in a direction perpendicular to the line 32 between the segments 28 and 30 of the top wall 24 (i.e. from front to rear).
  • a conventional circular clamp 44 is preferably mounted horizontally about the sander housing 16 with a pair of bosses 46 extending outwardly from opposite la teral sides of the clamp 44, and a pair of upstanding arms 48 are mounted on top of the rear segment 30 of the top wall 24 of the shield 22 on opposite lateral sides of the central hole 42.
  • Each boss 46 extends through a hole in the upper portion of each arm 48. Stops 50 are preferably provided in front and in back of each boss 46 to limit the frontward and rearward pivoting movement of the arms 48 about the pair of bosses 46 and thereby limit the pivoting movement of the shield 22 about the sander 10.
  • the shield 22 hereinbefore described being merely a preferred embodiment.
  • the top wall 24 of the shield 22 need not be generally round, and the skirt 26 of the shield need not be generally cylindrical so long as the skirt 26 is completely outside (i.e. horizontally beyond) the horizontal travel of the abrading part 12.
  • the shield 22 can be used with a non-rotary sander 10, such as a sander having an abrading part which moves horizontally, vertically or reciprocally relative to the housing 16 of the sander 10, so long as the shield's skirt 26 substantially surrounds horizontally any horizontal travel of the abrading part 12.
  • a non-rotary sander such as a sander having an abrading part which moves horizontally, vertically or reciprocally relative to the housing 16 of the sander 10, so long as the shield's skirt 26 substantially surrounds horizontally any horizontal travel of the abrading part 12.
EP86308958A 1985-08-09 1986-11-17 Schutzhaube für Handschleifer Withdrawn EP0267993A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US06/764,041 US4622782A (en) 1985-08-09 1985-08-09 Sander shield
EP86308958A EP0267993A1 (de) 1986-11-17 1986-11-17 Schutzhaube für Handschleifer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86308958A EP0267993A1 (de) 1986-11-17 1986-11-17 Schutzhaube für Handschleifer

Publications (1)

Publication Number Publication Date
EP0267993A1 true EP0267993A1 (de) 1988-05-25

Family

ID=8196219

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86308958A Withdrawn EP0267993A1 (de) 1985-08-09 1986-11-17 Schutzhaube für Handschleifer

Country Status (1)

Country Link
EP (1) EP0267993A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2163344A2 (de) 2008-09-12 2010-03-17 Protool GmbH Hand-Werkzeugmaschine mit einer Seitenrandabdeckung
JP2017052061A (ja) * 2015-09-10 2017-03-16 株式会社マキタ グラインダ、カバー及びロックナット
US10478943B2 (en) 2015-09-10 2019-11-19 Makita Corporation Grinder, cover and cover set
CN110757307A (zh) * 2019-10-31 2020-02-07 中船黄埔文冲船舶有限公司 一种打磨装置
US10556319B2 (en) 2015-09-10 2020-02-11 Makita Corporation Grinder and cover

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB715760A (en) * 1951-08-21 1954-09-22 John Robert Billau Improvements in and relating to suction hoods for grinding discs and the like
US3673744A (en) * 1971-02-12 1972-07-04 Anders Oimoen Portable grinder
US3785092A (en) * 1971-12-28 1974-01-15 A Hutchins Abrading tool having suction system for collecting abraded particles
US3824745A (en) * 1972-08-21 1974-07-23 A Hutchins Suction system for abrading tool
US3935678A (en) * 1972-08-02 1976-02-03 Miksa Marton Vacuum attachment for abrading machine
DE2539762A1 (de) * 1975-09-06 1977-03-17 Hardo Heuer Schutz- und absaughaube fuer handschleif- und poliermaschinen
US4135334A (en) * 1976-09-27 1979-01-23 Firma Robert Bosch Gmbh Dust exhaust hood
DE2943185A1 (de) * 1979-10-25 1981-05-07 Franz 8050 Freising Geißdörfer Falzfraese fuer fensterfluegel

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB715760A (en) * 1951-08-21 1954-09-22 John Robert Billau Improvements in and relating to suction hoods for grinding discs and the like
US3673744A (en) * 1971-02-12 1972-07-04 Anders Oimoen Portable grinder
US3785092A (en) * 1971-12-28 1974-01-15 A Hutchins Abrading tool having suction system for collecting abraded particles
US3935678A (en) * 1972-08-02 1976-02-03 Miksa Marton Vacuum attachment for abrading machine
US3824745A (en) * 1972-08-21 1974-07-23 A Hutchins Suction system for abrading tool
DE2539762A1 (de) * 1975-09-06 1977-03-17 Hardo Heuer Schutz- und absaughaube fuer handschleif- und poliermaschinen
US4135334A (en) * 1976-09-27 1979-01-23 Firma Robert Bosch Gmbh Dust exhaust hood
DE2943185A1 (de) * 1979-10-25 1981-05-07 Franz 8050 Freising Geißdörfer Falzfraese fuer fensterfluegel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 71 (M-202)[1216], 24th March 1983; & JP - A - 57 211 467 (AKIRA TAKASE) 25-12-1982 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2163344A2 (de) 2008-09-12 2010-03-17 Protool GmbH Hand-Werkzeugmaschine mit einer Seitenrandabdeckung
EP2163344A3 (de) * 2008-09-12 2013-05-29 Festool Group GmbH & Co. KG Hand-Werkzeugmaschine mit einer Seitenrandabdeckung
JP2017052061A (ja) * 2015-09-10 2017-03-16 株式会社マキタ グラインダ、カバー及びロックナット
EP3141343A3 (de) * 2015-09-10 2017-03-22 Makita Corporation Schleifer, abdeckung und verschlussmutter
US10357868B2 (en) 2015-09-10 2019-07-23 Makita Corporation Grinder, cover, and lock nut
US10478943B2 (en) 2015-09-10 2019-11-19 Makita Corporation Grinder, cover and cover set
US10556319B2 (en) 2015-09-10 2020-02-11 Makita Corporation Grinder and cover
CN110757307A (zh) * 2019-10-31 2020-02-07 中船黄埔文冲船舶有限公司 一种打磨装置

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