EP1612002B1 - Power tool - Google Patents

Power tool Download PDF

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Publication number
EP1612002B1
EP1612002B1 EP04254013A EP04254013A EP1612002B1 EP 1612002 B1 EP1612002 B1 EP 1612002B1 EP 04254013 A EP04254013 A EP 04254013A EP 04254013 A EP04254013 A EP 04254013A EP 1612002 B1 EP1612002 B1 EP 1612002B1
Authority
EP
European Patent Office
Prior art keywords
housing
platen
power
curvature
radius
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.)
Revoked
Application number
EP04254013A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1612002A1 (en
Inventor
Nigel Robson
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.)
Black and Decker Inc
Original Assignee
Black and Decker Inc
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34930461&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1612002(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Black and Decker Inc filed Critical Black and Decker Inc
Priority to AT04254013T priority Critical patent/ATE458589T1/de
Priority to DE602004025686T priority patent/DE602004025686D1/de
Priority to EP04254013A priority patent/EP1612002B1/en
Priority to AU2004205226A priority patent/AU2004205226A1/en
Priority to CA002479280A priority patent/CA2479280A1/en
Priority to NZ534961A priority patent/NZ534961A/en
Priority to US11/019,840 priority patent/US20060003680A1/en
Priority to CN200510082489.2A priority patent/CN1715005A/zh
Publication of EP1612002A1 publication Critical patent/EP1612002A1/en
Publication of EP1612002B1 publication Critical patent/EP1612002B1/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles

Definitions

  • the present invention relates to power sanders according to the preamble of claim 1 and to power tools according to the preamble of claim 16.
  • Such power sanders and power tools are respectively known from documents DE-A-196 17 477 and EP-A-0953407 .
  • Powered tools such as power drills in which a drill bit is rotated by an output shaft which is in turn rotated by means of an electric motor, generate significant amounts of vibration, which can under certain circumstances limit the length of time during which the tool can be used continuously.
  • the housing of such tools is generally made from a durable plastics material on which it can be difficult for a user of the tool to maintain a grip when the tool is in use for a sustained period. This generally limits the degree of comfort and ease with which a user can handle the tool.
  • Preferred embodiments of the present invention seek to provide a power tool which is easier and more comfortable to use.
  • a power sander 2 has a housing 4 supporting a mounting platen 6 for supporting a sanding head 8 ( Figure 10 ) for oscillatory orbital motion of the platen 6 and sanding head 8 relative to the housing 4.
  • the housing 4 has side surfaces 10, 12, a curved front surface 14 containing an on/off switch 16 for switching electrical power to a motor 18 ( Figure 10 ) in the housing 4, a curved upper surface 20 and a generally saddle shaped graspable surface 22 located between the front surface 14 and upper surface 20.
  • the graspable surface 22 has a concave upper portion 24 and concave side portions 26, 28 arranged on opposite sides of the upper portion 24.
  • the saddle shaped graspable surface 22 has a concaved upper portion 24 having a radius of curvature of about 23mm, and side portions having radii of curvature of about 10mm.
  • the upper surface 20 of the housing 4 is defined by a blister pack 30, defining a gel-containing chamber 32 containing vibration absorbing gel formed from a semi solid silicone rubber or polyurethane material and protruding from an aperture in a clamping plate 34.
  • each side surface 10, 12 is defined by a blister pack 36, defining a gel-containing chamber 38 protruding through an aperture in clamping plate 40.
  • the blister pack 36 forming part of side surface 10 is formed from a pair of flexible sheets 46 of polyurethane material defining gel-containing chamber 38 and sealed together at a peripheral portion 48 surrounding the gel-containing chamber 38.
  • the peripheral portion contains no vibration absorbing gel material and is pierced by a series of apertures 44 which correspond in position to apertures 42 on the part of housing 4 to which the blister pack 36 is to be mounted, and to pins 43 moulded onto the rear surface of clamping plate 40.
  • the blister pack 36 is mounted to the housing 4 by passing the pins 43 of clamping plate 40 through the corresponding apertures 44 in the peripheral portion of blister pack 36, and then inserting the pins 43 into the corresponding apertures 42 on the housing 4.
  • the blister pack 36 is located on the pins 43 of clamping plate 40, and the pins of the clamping plate 40 are then located in the apertures 42 on the housing.
  • the pins 43 and apertures 42, 44 are irregularly spaced, which minimises the risk of incorrect location of the clamping plate 40, blister pack 36 and housing 4 relative to each other.
  • the pins 43 on clamping plate 40 are of such length that when the blister pack 36 is located on the pins and the clamping plate 40 is mounted to the housing 4 by locating the pins in apertures 42 on the housing 4, the pins protrude from the inner wall of the housing 4 to a depth of approximately 3 mm.
  • the clamping plate 40 is then sealed to the housing 4 by a technique known to persons skilled in the art as "hot staking" in which a heated mandrel is applied to the protruding ends of the pins, which melts the protruding ends so that they are widened in a generally circular arrangement and fix the pins to the housing 4 in a manner similar to that of a rivet.
  • the distal ends of the pins can be heated by means of ultrasound.
  • the clamping plate 40 is then sealed to the housing and prevents removal of the clamping plate 40 from the housing 4, and the gel-containing chamber 38 of blister pack 36 protrudes through the aperture 45 of clamping plate 40 to define part of side surface 10, while removal of the blister pack 36 is prevented because the pins pass through the apertures 44 in the blister pack 36.
  • the blister pack 36 forming part of opposite side surface 12 and the blister pack 30 forming part of upper surface 20 are secured to the housing in a similar manner by means of heat or ultrasound.
  • FIG 10 shows a drive unit including the electric motor 18 and first drive shaft 50.
  • a fan 52 mounted on shaft 50 is arranged to draw air in from mouth 54 of the drive unit as shown by arrow A ( Figure11 ), and direct it through extractor duct 56 to outlet 58, as shown by arrow B.
  • Bearing 60 is eccentrically located radially in respect to shaft 50, and a second drive shaft 62 rotates about the axis of bearing 60.
  • Mounting platen 6 is fixed to the housing 4 by means of four flexible rubber legs 64. The mounting platen 6 is substantially flat, and the legs 64 extend from a common major surface of the platen 6 (the upper surface as shown in Figure 10 ), directed into the body of the housing 4.
  • the flexible legs 64 extending from the mounting platen 6 are permanently fixed at their housing end to the housing 4, i.e. they are not removable in use by the operator. They are attached to the housing 4 by means of clamping flanges 66 of the housing 4. The flexible legs 64 are attached at their mounting platen end to the mounting platen 6 by passing through apertures in hollow projecting portions 68 that extend in the direction of the flexible legs 64 from the upper surface of the mounting platen 6. The flexible legs 64 are provided at their mounting platen 6 end with an internally screw threaded hollow recess for attachment to a securing screw. The manner in which this securement to the mounting platen is effected is described in more detail below with reference to Figure 11 .
  • the mounting platen 6 surrounds the second drive shaft 62, and is spaced radially therefrom. This means that the mounting platen 6 itself is not directly driven by either of the drive shafts.
  • a first sanding platen which is a random orbit sanding head 8 is secured next to the mounting platen 6 onto the drive shaft 62. Securement of the random orbit sanding head 8 is achieved by a bolt 70 and washer 72.
  • the bolt 70 passes through an aperture in the sanding head 8, through aperture 74 in the mounting platen (see Figures 12 and 13 ), and over the driving spindle of the second drive shaft 62.
  • the sanding platen 8 is located in a parallel plane to the mounting platen 6, but is spaced from it, so that there is no contact between the facing surfaces of the mounting platen 6 and the sanding shoe 8. Therefore free rotation of the sanding platen 8 is permitted about the bearing axis 60, and the platen 8 exhibits a random orbit.
  • a brake pad 76 is provided on the under-surface of the mounting platen 6.
  • the brake pad 76 comprises a resilient member 78 in the form of a ring formed from a synthetic rubber resilient material, and an abrasion resistant contact layer 80 comprising polytetrafluoroethylene (PTFE) filed with carbon fibre or glass for increased abrasion resistance.
  • PTFE polytetrafluoroethylene
  • this brake 76 The purpose of this brake 76 is two-fold: first, in use, the brake acts as a speed limiter, operating in particular to prevent scratches when the unit is placed on and taken off the work surface, and secondly when the unit is switched off, the stop time is very much reduced compared to a non-braked tool.
  • the drive shaft 50 is typically driven at a rotational speed of 12000rpm, which is too fast a speed for rotation of the sanding platen 8.
  • the brake pad 76 limits the rotational speed of the platen to an acceptable operating speed, typically around 1200 rpm, or 10% of the rotational speed of the motor.
  • Figure 11 shows the drive unit of the hand tool with an orbital sanding platen 84 mounted in place of the random orbit platen of Figure 10 .
  • Figures 12 and 13 are perspective views of the mounting platen 8 (which is common to both Figures 10 and 11 ) and the sanding platen 84 (which is shown in Figure 11 , but not in Figure 10 ).
  • FIGs 12 and 13 show in more detail features of the mounting platen 8, which remains on the housing when the platens 84 and 8 are interchanged. From these Figures it can be seen that the mounting platen 8 is generally a blunt shoe shape, and is substantially flat, with a peripheral lip 86 extending downwards towards the sanding shoe 84.
  • the large central aperture 74 allowing it to be positioned around the second drive shaft, radially distant therefrom, so there is no direct contact between the mounting platen 6 and the second drive shaft 62, can also be clearly seen in these Figures, as can the four hollow right cylindrical portions 88, integrally formed with the surface of the mounting platen 8, and projecting into the body of the housing 4 i.e. upwards as shown in the Figures.
  • An inner lip 90 extends downwards around most of the central aperture 74, and joins to the outer peripheral lip 92 of the mounting platen 6 at two points 94 on one short side of the mounting platen 8.
  • the pin-shaped coupling members 96 are also integrally formed with the mounting platen 8.
  • the substantially flat mounting platen with its projecting portions 88 and 96 are preferably integrally injection moulded from polymeric material or diecast zinc.
  • the four coupling pins 96 provided on the opposite surface of the mounting platen 6 from the flexible legs 64, in corresponding positions, i.e. vertically aligned with the legs 64 as shown in Figures 12 and 13 have a dual function; the pins 96 secure the legs 64 in place, and couple with an orbital sanding head 84, in use, to prevent free rotation of that sanding head ( Figures 11 to 13 ).
  • Each coupling pin 96 is an integrally formed part shaped as a hollow cylinder.
  • the pin member 96 contains a radially directed flange 98 extending partially into the hollow of the pin member 96, to act as a stop member for a separate externally screw threaded headed bolt member 100 (see Figures 10 and 11 ).
  • the externally screw threaded bolt member 100 passes through the hollow central pin member 96, and is shaped and sized to slide into the hollow pin member until its head abuts the internal stop flange 98, and then screw into inner hollow screw threaded cylindrical recesses at the mounting platen end of the flexible legs 64. By this screw threaded bolt member 100 the flexible legs 64 are therefore secured to the mounting platen.
  • each pin member 96 is located between part of the peripheral lip 86 and the inner lip 90 of the mounting platen 6.
  • the pin member 96 of the coupling means acts to couple to the orbital sanding shoe 84 to prevent its free rotation.
  • the orbital sanding shoe 84 when mounted on the drive unit, the orbital sanding shoe 84 is secured to the spindle of second drive shaft 62 by means of the same nut 70 and washer 72 used to secure the random orbit sanding platen 8 of Figure 10 .
  • the orbital sanding shoe 84 is substantially flat, and is provided, on its upper major surface in the orientation shown in the Figure, with coupling means 92 shaped to cooperate with the coupling means 96 of the mounting platen 6.
  • the coupling means 92 each comprise a hollow right-cylindrical stub, projecting upwards from the surface of the sanding shoe 84.
  • the hollow right cylindrical projection 92 is shaped so that it provides a recess into which the pin member 96 of the mounting platen fits.
  • One side of the cylindrical projection 92 on the sanding shoe 84 fits between the peripheral lip 86 of the mounting platen 6 and the outer surface of the pin member 96 of the mounting platen 6; and the opposite side of the cylindrical projection 92 on the sanding shoe 84 fits between the inner lip 90 of the mounting platen 6 and the opposite outer surface of the pin member 96 of the mounting platen 6.
  • the sanding shoe 84 and mounting platen 6 are therefore securely located substantially to prevent relative movement between the mounting platen 6 and the sanding shoe 84 in a plane perpendicular to the axis of the bearing 60. Relative movement parallel to the axis of the bearing 60 is, of course, prevented by the nut 70 and washer 72 attachment.
  • the coupling means 96 and 92 are non uniformly spaced over the surface of the mounting platen 6 and the sanding platen 84, those on one lateral side of the platens (the right as shown in Figures 12 and 13 ) being further apart from each other than those on the other lateral side of the platens (the left as shown in the Figures).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Braking Systems And Boosters (AREA)
  • Valve Device For Special Equipments (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
EP04254013A 2004-07-02 2004-07-02 Power tool Revoked EP1612002B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
AT04254013T ATE458589T1 (de) 2004-07-02 2004-07-02 Kraftwerkzeug
DE602004025686T DE602004025686D1 (de) 2004-07-02 2004-07-02 Kraftwerkzeug
EP04254013A EP1612002B1 (en) 2004-07-02 2004-07-02 Power tool
AU2004205226A AU2004205226A1 (en) 2004-07-02 2004-08-25 Power tool
CA002479280A CA2479280A1 (en) 2004-07-02 2004-08-26 Power tool
NZ534961A NZ534961A (en) 2004-07-02 2004-08-27 Handheld power sander
US11/019,840 US20060003680A1 (en) 2004-07-02 2004-12-22 Power tool
CN200510082489.2A CN1715005A (zh) 2004-07-02 2005-07-04 电动工具

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04254013A EP1612002B1 (en) 2004-07-02 2004-07-02 Power tool

Publications (2)

Publication Number Publication Date
EP1612002A1 EP1612002A1 (en) 2006-01-04
EP1612002B1 true EP1612002B1 (en) 2010-02-24

Family

ID=34930461

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04254013A Revoked EP1612002B1 (en) 2004-07-02 2004-07-02 Power tool

Country Status (8)

Country Link
US (1) US20060003680A1 (zh)
EP (1) EP1612002B1 (zh)
CN (1) CN1715005A (zh)
AT (1) ATE458589T1 (zh)
AU (1) AU2004205226A1 (zh)
CA (1) CA2479280A1 (zh)
DE (1) DE602004025686D1 (zh)
NZ (1) NZ534961A (zh)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7730589B2 (en) * 2005-05-27 2010-06-08 Black & Decker Inc. Power tool with gel grip including an integral backing
GB0512380D0 (en) * 2005-06-17 2005-07-27 Akhter Pervez Oscillating base clothes iron
US20090004953A1 (en) * 2007-06-27 2009-01-01 Kinsey Verla M Skin sander
JP5447977B2 (ja) * 2010-07-01 2014-03-19 株式会社マキタ 電動工具
CN105150092B (zh) * 2014-06-10 2017-06-30 南京德朔实业有限公司 适用于砂光机的底板
US10632589B2 (en) 2016-08-29 2020-04-28 Black & Decker Inc. Power tool
CN108067985B (zh) * 2016-11-08 2023-11-07 苏州宝时得电动工具有限公司 砂光机
USD863913S1 (en) * 2018-05-23 2019-10-22 Zhuhai Sharp-Group Enterprise Co., Ltd. Triangular sander
EP3941687A4 (en) * 2019-04-17 2022-12-28 Massachusetts Institute Of Technology VIBRATION DAMPER FOR POWER TOOLS
USD900573S1 (en) * 2019-05-06 2020-11-03 Shenzhen Aukeyhi Technology co., Ltd. Sander

Family Cites Families (23)

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Publication number Priority date Publication date Assignee Title
US3019673A (en) * 1959-02-17 1962-02-06 Atlas Copco Ab Portable power tools
USD272511S (en) * 1981-03-26 1984-02-07 Ryobi Ltd. Electric sander
US4879847A (en) * 1989-03-13 1989-11-14 Snap-On Tools Corporation Cover for pneumatic tool
USD332734S (en) * 1989-10-24 1993-01-26 Makita Electric Works, Ltd. Polisher
US5419737A (en) * 1993-10-28 1995-05-30 Ryobi Motor Products Corp. Random orbital sanding machine having a removable debris container
US5445479A (en) * 1994-08-17 1995-08-29 Hillinger; George Ergonomically designed, electrically energized hand drill having a housing, longitudinally aligned with a hand, wrist and forearm support
US5709596A (en) * 1996-01-22 1998-01-20 Ryobi North America Ergonomically profiled hand grip for a hand-held tool having a pivotable pommel
USD380950S (en) * 1996-01-22 1997-07-15 Black & Decker Inc. Polisher housing
DE19617477A1 (de) * 1996-05-02 1997-11-06 Bosch Gmbh Robert Elektrische Handschleifmaschine
DE29717071U1 (de) * 1997-09-24 1999-02-04 Robert Bosch Gmbh, 70469 Stuttgart Handwerkzeugmaschine
USD416459S (en) * 1997-11-15 1999-11-16 Black & Decker Inc. Sander
USD408245S (en) * 1998-03-06 1999-04-20 Black & Decker Inc. Sheet sander
GB9809030D0 (en) * 1998-04-29 1998-06-24 Black & Decker Inc Powered oscillating hand tool
DE29922108U1 (de) * 1999-12-16 2000-02-17 Hilti Ag, Schaan Handgeführtes Schleifgerät
AU2001296698A1 (en) * 2000-10-10 2002-04-22 Andrew M. Putnam Hand grip device
USD447397S1 (en) * 2000-10-16 2001-09-04 Black & Decker Inc. Sander
US6591456B2 (en) * 2001-07-09 2003-07-15 Bic Corporation Cushioning device
GB2380151B (en) * 2001-07-20 2004-09-22 Black & Decker Inc Oscillating hand tool
US6951046B2 (en) * 2002-02-28 2005-10-04 Robinson Josh M Hand pressure abatement apparatus for use with a power tool
US7363685B2 (en) * 2002-10-28 2008-04-29 Black & Decker Inc. Handle assembly for tool
US20050221738A1 (en) * 2004-04-06 2005-10-06 Cooper Vincent P Orbital sander with vertical handle
US20050221737A1 (en) * 2004-04-06 2005-10-06 Cooper Vincent P Orbital sander with vertical handle
EP1612001A1 (en) * 2004-07-02 2006-01-04 BLACK & DECKER INC. Handle assembly for power tool

Also Published As

Publication number Publication date
ATE458589T1 (de) 2010-03-15
EP1612002A1 (en) 2006-01-04
CN1715005A (zh) 2006-01-04
NZ534961A (en) 2006-04-28
AU2004205226A1 (en) 2006-01-19
US20060003680A1 (en) 2006-01-05
CA2479280A1 (en) 2006-01-02
DE602004025686D1 (de) 2010-04-08

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