US20010029149A1 - Magnetic wiper - Google Patents
Magnetic wiper Download PDFInfo
- Publication number
- US20010029149A1 US20010029149A1 US09/881,476 US88147601A US2001029149A1 US 20010029149 A1 US20010029149 A1 US 20010029149A1 US 88147601 A US88147601 A US 88147601A US 2001029149 A1 US2001029149 A1 US 2001029149A1
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- Prior art keywords
- carrier surface
- gap
- wiper
- accordance
- magnetic
- 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.)
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 40
- 239000012530 fluid Substances 0.000 claims abstract description 75
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 230000000717 retained effect Effects 0.000 claims abstract description 3
- 230000004907 flux Effects 0.000 abstract description 3
- 238000007790 scraping Methods 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 2
- 150000002118 epoxides Chemical class 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
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
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
- B24B1/005—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes using a magnetic polishing agent
-
- 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
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
- B24B31/112—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work using magnetically consolidated grinding powder, moved relatively to the workpiece under the influence of pressure
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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
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0231—Magnetic circuits with PM for power or force generation
- H01F7/0252—PM holding devices
Definitions
- the present invention relates to apparatus for wiping a fluid from a surface, more particularly to apparatus for removing and capturing a liquid being carried on a moving surface, and most particularly to apparatus for removing and capturing a ribbon of magnetorheological fluid from a fluid-conveying surface in a magnetorheological finishing apparatus.
- a magnetorheological finishing machine may further include a fluid handling system for regenerating spent fluid and for metering regenerated fluid to the work zone; a nozzle for dispensing fluid from the fluid handling system onto the carrier surface; and a mechanical scraper in contact with the carrier surface for removing spent fluid from the carrier surface and returning it to the fluid handling system to be regenerated.
- the contact scraper includes a chamber connected to a fluid return tube and open on the side facing the carrier surface.
- the sides of the chamber adjacent to the carrier surface are formed to conform generally to the surface, whether planar, cylindrical, or spherical, and are provided with an elastomeric lip which bears resiliently on the carrier surface passing by the chamber and which mechanically scrapes the magnetorheological fluid from the surface into the chamber.
- a known art scraper has several serious shortcomings.
- Third, the mechanical scraping action can wear, and thereby deform, the carrier surface, the correct shape of which is highly important to controlling the rate of finishing and the shape of the finishing zone. Particles of elastomer worn from the lip can contaminate the magnetorheological working fluid. Thus, unavoidable wear by the scraper can endanger the quality of finishing and shorten undesirably the working life of the carrier surface.
- FIG. 4 b is a cross-sectional view like that shown in FIG. 4 a , showing use of an electromagnet
- FIG. 4 c is an isometric view like that shown in FIG. 3, showing the chamber cover omitted to present more clearly the shape and contours of the magnet pole pieces;
- FIG. 5 is a cross-sectional view of the novel wiper shown in FIGS. 3 - 4 b , showing the wiper in operation in place of a mechanical scraper on a prior art magneto-rheological finishing machine like that shown in FIG. 1;
- FIG. 6 a is an isometric view of a second embodiment of a magnetic wiper in accordance with the invention.
- FIG. 7 is an isometric view of a novel magnetorheological finishing apparatus for finishing small-radius concave elements, showing incorporation of the wiper embodiment shown in FIGS. 6 a and 6 b ;
- FIG. 8 is a cross-sectional elevational view of a portion of the apparatus shown in FIG. 7, showing the relationship of the fluid wiper to the carrier wheel.
- Apparatus 10 includes a carrier surface 12 on a rotatable carrier wheel 13 , typically a cylindrical or spherical section disposed symmetrically about an equatorial plane, for presenting magnetorheological fluid 14 to a work zone 16 on the carrier surface and for carrying the fluid away; further, a fluid handling system 18 for regenerating spent fluid and for metering regenerated fluid to the work zone; further, a nozzle 20 for dispensing fluid from the fluid handling system onto the carrier surface; and further, a mechanical scraper 22 in contact with the carrier surface 12 for removing spent fluid from the carrier surface and returning it to the fluid handling system to be regenerated.
- the scraper is disposed at an internal wheel angle of between about 30° and about 90° from the center of the work zone (which is preferably at top dead center position of the wheel, as shown in FIG. 1). To facilitate scraping of the fluid from the carrier surface, it is desirable that the scraper be disposed substantially out of the fringing field created by the work zone magnets.
- a magnetic wiper 34 in accordance with the invention for substitution in place of scraper 22 as shown in FIG. 1, includes first and second magnetic polepieces, arbitrarily designated as north 36 and south 38 , connected to a magnet 40 (permanent, as shown in FIG. 4 a , or electro, as shown in FIG. 4 b ) to form a distorted horseshoe magnet.
- the polepieces are elongated in width in a first direction 41 orthogonal to a second direction 43 of magnetic flux and are disposed substantially orthogonal to the direction of motion 45 of magnetorheological fluid entering the wiper assembly.
- the polepieces are curved in the first direction as shown in FIGS.
- Polepiece 36 forms and defines the bottom 55 of a trough-shaped chamber 42 , which trough may be cylindrical and preferably is conical, as shown in FIG. 4 c
- Polepiece 36 further comprises a flange 44 forming a rear wall of chamber 42 having a port 46 therethrough for receiving fluid return tube 26 .
- Polepieces 36 and 38 preferably are configured at the free ends thereof, 48 , 50 respectively, to have a first gap 49 therebetween and to be closely but non-contactingly conformal to carrier surface 12 , a second gap 51 of substantially uniform width being formed between free ends 48 , 50 and surface 12 .
- free ends 48 , 50 are substantially spherical-conforming.
- the outer end of first gap 49 is between about 1 mm and about 4 mm, preferably about 2 mm.
- Second gap 51 is between about 0.05 mm and about 1 mm, preferably about 0.10 mm.
- the magnetic field in the gaps causes the leading magnetorheological fluid to respond in known fashion by stiffening into a paste- or clay-like consistency, thereby filling first gap 49 and plugging second gap 51 to form a plug defining a dynamic liquid seal 53 between the magnet and the carrier surface.
- the plug is locked in place by the keystone shape of gap 49 .
- the magnetic field traps all of the fluid within gaps 49 and 51 , allowing none to escape with surface 12 , such that surface 12 is effectively wiped clean of fluid and is prepared to continue onward to be recoated with replenished fluid by nozzle 20 as shown in FIG. 1.
- a second embodiment 60 of a magnetic wiper in accordance with the invention is intended for use at a position about 180° around carrier wheel 13 from work zone 16 , as shown in FIG. 8.
- Magnetorheological finishing machine 62 shown in FIG. 7 is intended for, and optimized for, use in finishing concave elements having a relatively small radius of curvature. It is necessary that the application nozzle 20 and the magnetic wiper 60 be mounted at relatively high angles from the work zone to prevent steric interference with a workpiece being finished at zone 16 .
Abstract
Description
- The present invention relates to apparatus for wiping a fluid from a surface, more particularly to apparatus for removing and capturing a liquid being carried on a moving surface, and most particularly to apparatus for removing and capturing a ribbon of magnetorheological fluid from a fluid-conveying surface in a magnetorheological finishing apparatus.
- It is known to use abrasive fluids having magnetorheological properties to shape, finish, and polish objects, especially optical elements such as lenses and mirrors. See, for example, U.S. Pat. No. 5,616,066, “Magneto rheological Finishing of Edges of Optical Elements,” issued Apr. 1, 1997 to Jacobs et al., U.S. Pat. No. 5,795,212, “Deterministic Magnetorheological Finishing,” issued Aug. 18, 1998 to Jacobs et al., and U.S. Pat. No. 5,951,369, “System for Magnetorheological Finishing of Substrates,” issued Sep. 14, 1999 to Kordonsky et al. The relevant disclosures of these three patents are hereby incorporated by reference. As used herein, all ablative processes wherein abrasive particles are impinged onto a surface to be ablatively shaped are referred to collectively as “finishing.”
- A magnetorheological finishing machine, as disclosed in the incorporated references, includes a carrier surface on a rotatable element referred to as a carrier wheel. The carrier surface may reside on an axial face of the carrier wheel, or more commonly, on the peripheral radial surface of the wheel which typically is a cylindrical section or a spherical section disposed symmetrically about an equatorial plane. The carrier surface presents magnetorheological fluid to a work zone and carries spent fluid away. A magnetorheological finishing machine may further include a fluid handling system for regenerating spent fluid and for metering regenerated fluid to the work zone; a nozzle for dispensing fluid from the fluid handling system onto the carrier surface; and a mechanical scraper in contact with the carrier surface for removing spent fluid from the carrier surface and returning it to the fluid handling system to be regenerated.
- In the known art, the contact scraper includes a chamber connected to a fluid return tube and open on the side facing the carrier surface. The sides of the chamber adjacent to the carrier surface are formed to conform generally to the surface, whether planar, cylindrical, or spherical, and are provided with an elastomeric lip which bears resiliently on the carrier surface passing by the chamber and which mechanically scrapes the magnetorheological fluid from the surface into the chamber.
- A known art scraper has several serious shortcomings. First, the rubber lip can become worn and reduced in size by the abrasiveness of the magnetorheological fluid. Thus, the lip may need to be replaced frequently, requiring suspension of operations, such replacement being costly in operating time and replacement lips. Second, as the lip wears, the scraper must be advanced toward the carrier surface to maintain necessary contact with the surface and to compensate for lip wear. Such adjustment can be difficult to perform properly during operation of the finishing machine. Thus, the scraper is necessarily complicated in being both adjustable and advanceable. Third, the mechanical scraping action can wear, and thereby deform, the carrier surface, the correct shape of which is highly important to controlling the rate of finishing and the shape of the finishing zone. Particles of elastomer worn from the lip can contaminate the magnetorheological working fluid. Thus, unavoidable wear by the scraper can endanger the quality of finishing and shorten undesirably the working life of the carrier surface.
- What is needed is a non-contact means for removing magnetorheological fluid from a carrier surface without mechanically scraping the carrier surface.
- It is a principal object of the invention to provide an improved wiper for removing magnetorheological fluid from a carrier surface without mechanical contact between the wiper and the carrier surface.
- It is a further object of the invention to provide an improved carrier surface wiper wherein the magnetorheological properties of the fluid are used to assist in removing the fluid from the surface.
- It is a further object of the invention to provide an improved carrier surfaced wiper wherein the performance of the wiper is unaffected by the duration of use.
- Briefly described, a magnetic wiper for removing magnetorheological fluid from a carrier surface includes a distorted horseshoe magnet having north and south polepieces elongated in width in a first direction orthogonal to a second direction of magnetic flux in the gap between the polepieces. The polepieces are generally parallel at their free ends in the first direction, the first gap therebetween containing a magnetic field, are preferably divergent inwardly of the wiper in the second direction to maximize the field strength at the free ends, and are preferably arcuate such that the concave inner polepiece forms a trough for receiving magnetorheological fluid removed from the carrier surface and conveying it to an exit tube. The free ends are shaped to conform closely to the shape of the carrier surface, forming a second gap between the free ends and the carrier surface, the second gap containing a magnetic fringing field extending beyond the free ends. The first amount of magnetorheological fluid conveyed into proximity with the free ends by the carrier surface is magnetically stiffened to a very stiff paste which is retained in the first and second gaps by the magnetic fields and is thereby prevented from continuing onward with the carrier surface. The stiffened fluid forms a dynamic liquid seal in the gaps such that additional magnetorheological fluid carried towards the magnetic gaps by the carrier surface is wiped and diverted away from the surface and into the trough formed by the inner polepiece. Thus, the magnet forms an effective remover of magnetorheological fluid from the carrier surface without any mechanical scraping contact with the surface. Further, there is no wear of the wiper with use, so that performance of the wiper is unaffected by duration of use.
- The foregoing and other objects, features, and advantages of the invention, as well as presently preferred embodiments thereof, will become more apparent from a reading of the following description in connection with the accompanying drawings in which:
- FIG. 1 is a schematic drawing of a prior art magnetorheological finishing machine, showing the position of a fluid scraper in the fluid flow path;
- FIG. 2a is an exploded isometric view of a prior art contact scraper;
- FIG. 2b is an isometric assembly of the prior art contact scraper shown in FIG. 2a;
- FIG. 3 is an isometric view of a first embodiment of a magnetic wiper in accordance with the invention;
- FIG. 4a is a cross-sectional view of the wiper shown in FIG. 3, showing use of a permanent magnet;
- FIG. 4b is a cross-sectional view like that shown in FIG. 4a, showing use of an electromagnet;
- FIG. 4c is an isometric view like that shown in FIG. 3, showing the chamber cover omitted to present more clearly the shape and contours of the magnet pole pieces;
- FIG. 5 is a cross-sectional view of the novel wiper shown in FIGS.3-4 b, showing the wiper in operation in place of a mechanical scraper on a prior art magneto-rheological finishing machine like that shown in FIG. 1;
- FIG. 6a is an isometric view of a second embodiment of a magnetic wiper in accordance with the invention;
- FIG. 6b is a cross-sectional view of the magnetic wiper shown in FIG. 6a;
- FIG. 7 is an isometric view of a novel magnetorheological finishing apparatus for finishing small-radius concave elements, showing incorporation of the wiper embodiment shown in FIGS. 6a and 6 b; and
- FIG. 8 is a cross-sectional elevational view of a portion of the apparatus shown in FIG. 7, showing the relationship of the fluid wiper to the carrier wheel.
- Referring to FIGS.1-2 b, there is shown a generalized schematic of a prior art
magnetorheological finishing apparatus 10 substantially as disclosed in U.S. Pat. No. 5,951,369.Apparatus 10 includes acarrier surface 12 on arotatable carrier wheel 13, typically a cylindrical or spherical section disposed symmetrically about an equatorial plane, for presentingmagnetorheological fluid 14 to awork zone 16 on the carrier surface and for carrying the fluid away; further, afluid handling system 18 for regenerating spent fluid and for metering regenerated fluid to the work zone; further, anozzle 20 for dispensing fluid from the fluid handling system onto the carrier surface; and further, amechanical scraper 22 in contact with thecarrier surface 12 for removing spent fluid from the carrier surface and returning it to the fluid handling system to be regenerated. Other elements offluid handling system 18 shown in FIG. 1 are fully disclosed in the incorporated reference and need not be considered further here. Typically, the scraper is disposed at an internal wheel angle of between about 30° and about 90° from the center of the work zone (which is preferably at top dead center position of the wheel, as shown in FIG. 1). To facilitate scraping of the fluid from the carrier surface, it is desirable that the scraper be disposed substantially out of the fringing field created by the work zone magnets. -
Contact scraper 22 includes achamber 24 connected to afluid return tube 26 and open on the side facing the carrier surface. Thesides 28 of the chamber adjacent to the carrier surface are formed to conform generally to the surface, whether planar, cylindrical, or spherical, and are provided with anelastomeric lip 30 which may be removably mounted in achannel 32 insides 28 and which, in operating position, bears resiliently on thecarrier surface 12 passing by thechamber 24 to mechanically scrape the moving ribbon of magnetorheological fluid from the surface into the chamber. - Referring to FIGS.3-5, a
magnetic wiper 34 in accordance with the invention, for substitution in place ofscraper 22 as shown in FIG. 1, includes first and second magnetic polepieces, arbitrarily designated asnorth 36 and south 38, connected to a magnet 40 (permanent, as shown in FIG. 4a, or electro, as shown in FIG. 4b) to form a distorted horseshoe magnet. Preferably, the polepieces are elongated in width in afirst direction 41 orthogonal to asecond direction 43 of magnetic flux and are disposed substantially orthogonal to the direction ofmotion 45 of magnetorheological fluid entering the wiper assembly. Preferably, the polepieces are curved in the first direction as shown in FIGS. 3 and 4c such thatpolepiece 36 forms and defines the bottom 55 of a trough-shapedchamber 42, which trough may be cylindrical and preferably is conical, as shown in FIG. 4c,Polepiece 36 further comprises aflange 44 forming a rear wall ofchamber 42 having aport 46 therethrough for receivingfluid return tube 26. Polepieces 36 and 38 preferably are configured at the free ends thereof, 48,50 respectively, to have afirst gap 49 therebetween and to be closely but non-contactingly conformal tocarrier surface 12, asecond gap 51 of substantially uniform width being formed between free ends 48,50 andsurface 12. For example, as shown in FIG. 3, free ends 48,50 are substantially spherical-conforming. The outer end offirst gap 49 is between about 1 mm and about 4 mm, preferably about 2 mm.Second gap 51 is between about 0.05 mm and about 1 mm, preferably about 0.10 mm. - The
volume 52 bounded bypolepieces magnet 40 is a void which may conveniently be filled with a non-ferromagnetic filler such as an epoxide filling 56, as shown in FIG. 4a (omitted in FIGS. 3, 4b, and 4 c), to prevent collection of debris invoid 52. Preferably, the epoxide filling is stopped short of the tips of free ends 48,50 to provide afirst gap 49 therebetween. Preferably, the free ends are divergent inwardly in the second direction, as shown in FIG. 4c, to maximize the field strength at the free ends and to provide a keystone-shaped cross-section tofirst gap 49.Chamber 42 may be further provided with acover plate 54. - Extending from polepiece ends48,50 is a typical fringing magnetic field which is arcuate in compliance with the configuration of the free ends and which is intense within
first gap 49 andsecond gap 51. - In operation, as the leading edge of a ribbon of
magnetorheological fluid 14 being carried oncarrier surface 12 reachesfirst gap 49 andsecond gap 51, the magnetic field in the gaps causes the leading magnetorheological fluid to respond in known fashion by stiffening into a paste- or clay-like consistency, thereby fillingfirst gap 49 and pluggingsecond gap 51 to form a plug defining adynamic liquid seal 53 between the magnet and the carrier surface. The plug is locked in place by the keystone shape ofgap 49. The magnetic field traps all of the fluid withingaps surface 12, such thatsurface 12 is effectively wiped clean of fluid and is prepared to continue onward to be recoated with replenished fluid bynozzle 20 as shown in FIG. 1. Ascarrier wheel 13 continues to turn and thereby to convey additional magnetorheological fluid againstseal 53, the additional fluid is diverted away from the carrier surface and flows, either by gravity or by suction, along theupper surface 55 ofpolepiece 36 throughchamber 42 and thence throughtube 26. Thus,surface 12 is continuously wiped clean of magnetorheological fluid bywiper 34 without any mechanical contact withsurface 12. - At the conclusion of operation, free ends48,50 may be demagnetized for cleaning either through disconnecting of electromagnet 40 (FIG. 4a) or through attachment of a magnetic shunt 58, as shown in FIG. 5.
- Referring to FIGS. 6a through 8, a
second embodiment 60 of a magnetic wiper in accordance with the invention is intended for use at a position about 180° aroundcarrier wheel 13 fromwork zone 16, as shown in FIG. 8.Magnetorheological finishing machine 62 shown in FIG. 7 is intended for, and optimized for, use in finishing concave elements having a relatively small radius of curvature. It is necessary that theapplication nozzle 20 and themagnetic wiper 60 be mounted at relatively high angles from the work zone to prevent steric interference with a workpiece being finished atzone 16. -
Wiper 60 and itsfluid return tube 26 and mountingapparatus 64 fit nicely belowwheel 13 in the space betweenmachine magnet polepieces wiper 60 be provided with ferromagnetic shielding 70 which may be attached to acollar 72 ontube 26 as bybolts 74. Inembodiment 60,north polepiece 36 may be integral withtube 26, as shown in FIG. 8. Further, a concentricnon-magnetic spacer 76 may be provided betweenpolepieces - From the foregoing description, it will be apparent that there has been provided an improved non-contact wiper for removing magnetorheological fluid from a carrier surface, wherein the fringing field of a magnet disposed adjacent to the carrier surface stiffens some of the magnetorheological fluid to form a dynamic seal against which additional fluid piles up and may be diverted away from the carrier surface. Variations and modifications of the herein described non-contact wiper, in accordance with the invention, will undoubtedly suggest themselves to those skilled in this art. Accordingly, the foregoing description should be taken as illustrative and not in limiting sense.
Claims (16)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US09/881,476 US6309285B1 (en) | 2000-01-10 | 2001-06-14 | Magnetic wiper |
Applications Claiming Priority (2)
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US09/480,306 US6267651B1 (en) | 2000-01-10 | 2000-01-10 | Magnetic wiper |
US09/881,476 US6309285B1 (en) | 2000-01-10 | 2001-06-14 | Magnetic wiper |
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US09/480,306 Division US6267651B1 (en) | 2000-01-10 | 2000-01-10 | Magnetic wiper |
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US20010029149A1 true US20010029149A1 (en) | 2001-10-11 |
US6309285B1 US6309285B1 (en) | 2001-10-30 |
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US09/480,306 Expired - Fee Related US6267651B1 (en) | 2000-01-10 | 2000-01-10 | Magnetic wiper |
US09/881,476 Expired - Fee Related US6309285B1 (en) | 2000-01-10 | 2001-06-14 | Magnetic wiper |
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Cited By (3)
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WO2010101925A3 (en) * | 2009-03-06 | 2011-01-20 | Qed Technologies International, Inc. | System for magnetorheological finishing of a substrate |
US20130260651A1 (en) * | 2010-11-15 | 2013-10-03 | Excillum Ab | Apparatus and method for polishing an edge of an article using magnetorheological (mr) fluid |
CN103465171A (en) * | 2013-09-18 | 2013-12-25 | 中国科学院上海光学精密机械研究所 | Magnetorheological fluid recovery pipe |
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US7156724B2 (en) * | 2004-12-15 | 2007-01-02 | Qed Technologies International, Inc. | Method and apparatus for forming a dynamic magnetic seal using magnetorheological fluid |
US7959490B2 (en) | 2005-10-31 | 2011-06-14 | Depuy Products, Inc. | Orthopaedic component manufacturing method and equipment |
US8371905B1 (en) * | 2010-03-10 | 2013-02-12 | Zoom Focus Eyewear, LLC | Magnetically attached spectacle lens with hidden magnets and method |
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US9102030B2 (en) | 2010-07-09 | 2015-08-11 | Corning Incorporated | Edge finishing apparatus |
US8613640B2 (en) * | 2010-12-23 | 2013-12-24 | Qed Technologies International, Inc. | System for magnetorheological finishing of substrates |
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Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5449313A (en) * | 1992-04-14 | 1995-09-12 | Byelocorp Scientific, Inc. | Magnetorheological polishing devices and methods |
US5795212A (en) | 1995-10-16 | 1998-08-18 | Byelocorp Scientific, Inc. | Deterministic magnetorheological finishing |
US5775976A (en) * | 1997-03-27 | 1998-07-07 | Scientific Manufacturing Technologies, Inc. | Method and device for magnetic-abrasive machining of parts |
US6036580A (en) * | 1997-09-03 | 2000-03-14 | Scientific Manufacturing Technologies, Inc. | Method and device for magnetic-abrasive machining of parts |
US5951369A (en) | 1999-01-06 | 1999-09-14 | Qed Technologies, Inc. | System for magnetorheological finishing of substrates |
-
2000
- 2000-01-10 US US09/480,306 patent/US6267651B1/en not_active Expired - Fee Related
-
2001
- 2001-06-14 US US09/881,476 patent/US6309285B1/en not_active Expired - Fee Related
Cited By (7)
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WO2010101925A3 (en) * | 2009-03-06 | 2011-01-20 | Qed Technologies International, Inc. | System for magnetorheological finishing of a substrate |
CN102341216A (en) * | 2009-03-06 | 2012-02-01 | Qed技术国际股份有限公司 | System for magnetorheological finishing of a substrate |
JP2012519600A (en) * | 2009-03-06 | 2012-08-30 | キューイーディー・テクノロジーズ・インターナショナル・インコーポレーテッド | Substrate polishing system using magnetic fluid |
KR101333479B1 (en) * | 2009-03-06 | 2013-11-26 | 퀘드 테크놀러지즈 인터내셔날, 인크. | System for magnetorheological finishing of a substrate |
US20130260651A1 (en) * | 2010-11-15 | 2013-10-03 | Excillum Ab | Apparatus and method for polishing an edge of an article using magnetorheological (mr) fluid |
US9120193B2 (en) * | 2010-11-15 | 2015-09-01 | Agency For Science, Technology And Research | Apparatus and method for polishing an edge of an article using magnetorheological (MR) fluid |
CN103465171A (en) * | 2013-09-18 | 2013-12-25 | 中国科学院上海光学精密机械研究所 | Magnetorheological fluid recovery pipe |
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US6267651B1 (en) | 2001-07-31 |
US6309285B1 (en) | 2001-10-30 |
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