US20070034757A1 - Rollable Magnetic Clamp - Google Patents
Rollable Magnetic Clamp Download PDFInfo
- Publication number
- US20070034757A1 US20070034757A1 US11/462,365 US46236506A US2007034757A1 US 20070034757 A1 US20070034757 A1 US 20070034757A1 US 46236506 A US46236506 A US 46236506A US 2007034757 A1 US2007034757 A1 US 2007034757A1
- Authority
- US
- United States
- Prior art keywords
- pole plates
- magnetic
- clamp
- rollers
- wheels
- 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.)
- Abandoned
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 26
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 13
- 239000000696 magnetic material Substances 0.000 claims description 6
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 239000003302 ferromagnetic material Substances 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
- B25B11/002—Magnetic work holders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/14—Clamps for work of special profile
- B25B5/142—Clamps for work of special profile for windows and frames
Definitions
- the invention pertains to permanent magnetic clamping devices and specifically to permanent magnetic clamping devices used to clamp ferromagnetic workpieces together during fusion of said workpieces such as by welding or other joining processes.
- FIG. 1 illustrates but by no means limits with respect to shape or type a common type and shape of magnetic clamping device employing a magnetizing element, Item A of ferrite, rare earth or other magnetized material with its direction of magnetization through its thickness and with said magnetizing element sandwiched between two ferromagnetic pole plates, Item B.
- the assembly is usually held together with a combination of adhesive bonding and typically a rivet or rivets, Item C, preferably of non-magnetic material.
- Such clamping devices may be triangular, square, arrowhead shape, rectangular or any other shape suitable for the purpose of clamping ferromagnetic workpieces together at a right angle, 45 degrees or other angles.
- FIG. 2 illustrates another typical shape of magnetic clamping device, with Item D being the magnetizing element, Item E the pole plates and Item F a rivet. In some embodiments a number of rivets are used, disposed about the area of the pole plates.
- FIG. 3 shows a preferred embodiment of a magnetic clamping device having rollers or wheels, Item G, each having an axle or a reduced diameter portion bearing within a hole, Item H in the pole plates B.
- the width of the rollers or wheels is something less than the inside distance between the clamping device's pole plates so as to allow the wheel to rotate unhindered whilst they are retained between the pole plates.
- the said rollers are disposed upon the clamping device in such a position and are of such outer diameter that they provide an air-gap, Item I between the device's pole plate edges and any ferromagnetic surface upon which the clamp is placed, such as ferromagnetic work-pieces Items J and K.
- the said rollers or wheels in the preferred embodiment will be of non-magnetic material so as not to shunt the magnetic field between the pole plates and impair the available clamping force.
- FIG. 4 illustrates an alternative embodiment wherein the rollers, Item L, are positioned outside the pole plates of the clamp rather than between them.
- the rollers or wheels may be of either magnetic or non-magnetic material.
- the wheels are secured by means of a non-magnetic axle, Item M, through their centre and bearing in the holes, Item N in the pole plates, Item B.
- the said axle preferably has threaded ends for a locking nut, Item O.
- other means such as a central rivet, rivet forming part of the wheel, or screw into a threaded centre hole in each wheel may be deemed appropriate.
- rotatable rollers or wheels of preferably non-magnetic material which could be plastic or non-magnetic metal such as brass or aluminum are of such diameter and so disposed on the magnetic clamping device as to provide a small air-gap between the clamping edges of the pole plates and the surface on which the clamping device is placed, such that there is no frictional contact between the edges of the pole plates and the clamped surface.
- This small air-gap, provided by the rollers or wheels ensures that magnetic clamping is still effected but also that the clamping device may be manually propelled along the ferromagnetic surface to which it is magnetically clamped.
- rollers or wheels have their axle through the pole plates of the clamping device.
- the rollers or wheels may be near the corners or disposed at any points around the perimeter of the clamping device.
- the rollers or wheels may be disposed on the outside of the pole plates.
- the rollers or wheels may be of ferromagnetic material and disposed within or outside the pole plates in such a manner that they do or do not not provide a shunt to the magnetic field between the pole plates.
- Further alternative embodiments may include rollers or wheels that are not rotatable or a combination of rotatable and non-rotatable elements to provide the necessary air-gap.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
A magnetic clamping device which uses rollers or wheels to create an air-gap between the clamping edges and a ferromagnetic work-piece, thereby reducing friction so that the clamp is able to be rolled or easily moved upon the surface or surfaces to which it is clamped.
Description
- The present Utility Patent Application claims priority benefit of the U.S. Provisional Application for patent No. 60/706,726 filed on Aug. 10, 2005 under 35 U.S.C 119(e)
- The invention pertains to permanent magnetic clamping devices and specifically to permanent magnetic clamping devices used to clamp ferromagnetic workpieces together during fusion of said workpieces such as by welding or other joining processes.
- The clamping together of ferromagnetic workpieces with magnetic clamping devices during welding or similar processes is made awkward by the limited manoueverability of such clamping devices once they are magnetically clamped to such workpieces.
- This limitation in manoueverability makes it difficult to adjust a workpiece to a pre-determined position or mark once the magnetic clamping device has gripped the surface of either of the ferromagnetic workpieces. It is common to use hammers or other implements to effect such adjustment, with the consequent risk of damage to either the workpieces or the magnetic clamping device.
- Furthermore, such clamping devices often require relatively excessive force to remove from the workpieces after use.
- In view of the foregoing, there is a need for a magnetic clamping device that can more easily be manouevered once in position on a workpiece or workpieces.
- The present invention is illustrated by way of example, and not by way of limitation in the figures of the accompanying drawings and in which like reference numerals refer to similar elements and in which:
-
FIG. 1 illustrates but by no means limits with respect to shape or type a common type and shape of magnetic clamping device employing a magnetizing element, Item A of ferrite, rare earth or other magnetized material with its direction of magnetization through its thickness and with said magnetizing element sandwiched between two ferromagnetic pole plates, Item B. The assembly is usually held together with a combination of adhesive bonding and typically a rivet or rivets, Item C, preferably of non-magnetic material. Such clamping devices may be triangular, square, arrowhead shape, rectangular or any other shape suitable for the purpose of clamping ferromagnetic workpieces together at a right angle, 45 degrees or other angles. -
FIG. 2 illustrates another typical shape of magnetic clamping device, with Item D being the magnetizing element, Item E the pole plates and Item F a rivet. In some embodiments a number of rivets are used, disposed about the area of the pole plates.FIG. 3 shows a preferred embodiment of a magnetic clamping device having rollers or wheels, Item G, each having an axle or a reduced diameter portion bearing within a hole, Item H in the pole plates B. In this preferred embodiment the width of the rollers or wheels is something less than the inside distance between the clamping device's pole plates so as to allow the wheel to rotate unhindered whilst they are retained between the pole plates. The said rollers are disposed upon the clamping device in such a position and are of such outer diameter that they provide an air-gap, Item I between the device's pole plate edges and any ferromagnetic surface upon which the clamp is placed, such as ferromagnetic work-pieces Items J and K. The said rollers or wheels in the preferred embodiment will be of non-magnetic material so as not to shunt the magnetic field between the pole plates and impair the available clamping force. -
FIG. 4 illustrates an alternative embodiment wherein the rollers, Item L, are positioned outside the pole plates of the clamp rather than between them. In this embodiment the rollers or wheels may be of either magnetic or non-magnetic material. In a preferred embodiment the wheels are secured by means of a non-magnetic axle, Item M, through their centre and bearing in the holes, Item N in the pole plates, Item B. The said axle preferably has threaded ends for a locking nut, Item O. However, other means such as a central rivet, rivet forming part of the wheel, or screw into a threaded centre hole in each wheel may be deemed appropriate. - To achieve the foregoing and other objectives of the purpose of the invention a typical embodiment is described. In one embodiment rotatable rollers or wheels of preferably non-magnetic material which could be plastic or non-magnetic metal such as brass or aluminum are of such diameter and so disposed on the magnetic clamping device as to provide a small air-gap between the clamping edges of the pole plates and the surface on which the clamping device is placed, such that there is no frictional contact between the edges of the pole plates and the clamped surface. This small air-gap, provided by the rollers or wheels ensures that magnetic clamping is still effected but also that the clamping device may be manually propelled along the ferromagnetic surface to which it is magnetically clamped. In a typical embodiment these rollers or wheels have their axle through the pole plates of the clamping device. The rollers or wheels may be near the corners or disposed at any points around the perimeter of the clamping device. In an alternative embodiment the rollers or wheels may be disposed on the outside of the pole plates. In a further alternative embodiment the rollers or wheels may be of ferromagnetic material and disposed within or outside the pole plates in such a manner that they do or do not not provide a shunt to the magnetic field between the pole plates. Further alternative embodiments may include rollers or wheels that are not rotatable or a combination of rotatable and non-rotatable elements to provide the necessary air-gap.
- The embodiments disclosed are not intended to limit the invention to those forms. The invention is thus to cover all modifications, equivalents and alternatives falling within the spirit and scope of the following claims.
Claims (6)
1. A magnetic clamping device of the type having two or more ferromagnetic pole plates with a magnetizing element between them, having rollers or wheels of preferably non-magnetic material such as aluminium or brass or plastic fixed rotatably between the pole plates at several points around the perimeter of the device and of such diameter and location that the perimeter of the rollers always provides a small air-gap between the edges of the pole plates and any surface upon which the clamp is placed for the purpose of clamping.
2. A magnetic clamping device of the type having two or more ferromagnetic pole plates with a magnetizing element between them, having rollers or wheels of preferably non-magnetic material such as aluminium or brass or plastic fixed rotatably on the outer side of the pole plates at sveral points around the perimeter of the device and of such diameter and location that the perimeter of the rollers always provides a small air-gap between the edges of the pole plates and any surface upon which the clamp is placed for the purpose of clamping.
3. A magnetic clamping device of the type having two or more ferromagnetic pole plates with a magnetizing element between them, having rollers or wheels of ferromagnetic material fixed rotatably either between or on the outer side of the pole plates at several points around the perimeter of the device and of such diameter and location that the perimeter of the rollers always provides a small air-gap between the edges of the pole plates and any surface upon which the clamp is placed for the purpose of clamping.
4. A magnetic clamping device of the type having two or more ferromagnetic pole plates with a magnetizing element between them, having non-rotatable elements fixed as for any of the above claims so as to provide a small air-gap between the edges of the pole plates and any surface upon which the clamp is placed and to provide decreased friction between the clamp and the surface upon which it is clamped.
5. A magnetic clamp as described in claims 1 to 4 where the element to provide an air-gap between the clamping edges of the clamp and the surface to which it clamps is a magnetic or non-magnetic and non-rotatable skid or protrusion.
6. A magnetic clamp as decribed in claims 1 to 3 where the rotating rollers or wheels are of a type that enables movement in more than one direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/462,365 US20070034757A1 (en) | 2005-08-10 | 2006-08-04 | Rollable Magnetic Clamp |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US70672605P | 2005-08-10 | 2005-08-10 | |
US11/462,365 US20070034757A1 (en) | 2005-08-10 | 2006-08-04 | Rollable Magnetic Clamp |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070034757A1 true US20070034757A1 (en) | 2007-02-15 |
Family
ID=37741734
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/462,365 Abandoned US20070034757A1 (en) | 2005-08-10 | 2006-08-04 | Rollable Magnetic Clamp |
Country Status (1)
Country | Link |
---|---|
US (1) | US20070034757A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100071192A1 (en) * | 2008-09-19 | 2010-03-25 | Branko Sarh | Electromagnetic clamping device |
US20110018182A1 (en) * | 2009-07-24 | 2011-01-27 | The Boeing Company | Electromagnetic Clamping System for Manufacturing Large Structures |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4401961A (en) * | 1981-10-14 | 1983-08-30 | Rheinmagnet Horst Baermann Kg | Permanent magnetic holding arrangement, particularly for temporary holding of ferro-magnetic parts |
US5180975A (en) * | 1989-11-16 | 1993-01-19 | Advantest Corporation | Positioning device and IC conveyor utilizing the same |
-
2006
- 2006-08-04 US US11/462,365 patent/US20070034757A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4401961A (en) * | 1981-10-14 | 1983-08-30 | Rheinmagnet Horst Baermann Kg | Permanent magnetic holding arrangement, particularly for temporary holding of ferro-magnetic parts |
US5180975A (en) * | 1989-11-16 | 1993-01-19 | Advantest Corporation | Positioning device and IC conveyor utilizing the same |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100071192A1 (en) * | 2008-09-19 | 2010-03-25 | Branko Sarh | Electromagnetic clamping device |
WO2010033810A1 (en) * | 2008-09-19 | 2010-03-25 | The Boeing Company | Electromagnetic clamping device |
GB2476608A (en) * | 2008-09-19 | 2011-06-29 | Boeing Co | Electromagnetic clamping device |
GB2476608B (en) * | 2008-09-19 | 2013-01-09 | Boeing Co | Electromagnetic clamping device |
US8490955B2 (en) | 2008-09-19 | 2013-07-23 | The Boeing Company | Electromagnetic clamping device |
US8832940B2 (en) | 2008-09-19 | 2014-09-16 | The Boeing Company | Electromagnetic clamping device |
US9021704B2 (en) | 2008-09-19 | 2015-05-05 | The Boeing Company | Electromagnetic clamping method |
US20110018182A1 (en) * | 2009-07-24 | 2011-01-27 | The Boeing Company | Electromagnetic Clamping System for Manufacturing Large Structures |
US8864120B2 (en) | 2009-07-24 | 2014-10-21 | The Boeing Company | Electromagnetic clamping system for manufacturing large structures |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |