EP1902514A1 - Device for assisting the variable capacity generating movement - Google Patents
Device for assisting the variable capacity generating movementInfo
- Publication number
- EP1902514A1 EP1902514A1 EP06792484A EP06792484A EP1902514A1 EP 1902514 A1 EP1902514 A1 EP 1902514A1 EP 06792484 A EP06792484 A EP 06792484A EP 06792484 A EP06792484 A EP 06792484A EP 1902514 A1 EP1902514 A1 EP 1902514A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- conductive
- elements
- rolling
- driving
- insulating
- 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- Withdrawn
Links
- 230000033001 locomotion Effects 0.000 title claims abstract description 42
- 238000005096 rolling process Methods 0.000 claims description 66
- 238000006073 displacement reaction Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 5
- 230000001131 transforming effect Effects 0.000 claims description 2
- 239000004020 conductor Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
- H02N1/002—Electrostatic motors
- H02N1/004—Electrostatic motors in which a body is moved along a path due to interaction with an electric field travelling along the path
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
Definitions
- the present invention relates to systems having a non-constant capacity whose variations come from the movement of a mass driven by means movable between them.
- the invention relates in particular to motion assistance devices that recover electrical energy by electrostatic conversion during their implementation; other uses of variations in capacity may also be provided.
- Many mechanical systems move one element relative to another during operation.
- a ball bearing comprises two relatively movable parts whose movement causes the displacement of friction-limiting elements. These systems are optimized for their function of friction limitation and any energy loss resulting therefrom, and are considered only for their mechanical effect of motion transmission. However, the relative movement between two devices is also known to generate energy.
- the document WO 02/103881 proposes a recovery of the energy of a mobile system by magnetic principle, in which a magnetic mass is driven by oscillations with respect to a fixed guide, which causes a variation of the induced magnetic field, variation converted into electrical energy through a winding.
- documents US Pat. No. 2,266,057 or US Pat. No. 3,414,742 describe the electrostatic conversion of a rotational mechanical energy of a rotor into electrical energy.
- the invention proposes to recover energy from mechanical systems operating with relative movement between several elements. More generally, the invention relates to the generation of capacitive variations and their use. The invention finds particular application for movement assistance systems of the type of ball bearings and gears, but can be adapted to any system of similar principle. In one of its aspects, the invention relates to a device comprising two driving parts movable relative to one another and defining a space between them.
- the device may be of the "ball-bearing" type, with relative rotation between the drive portions that define an annular space, or “slide” type, with translation between two drive parts parallel to each other.
- the driving elements roll one or more elements moving in space so that they move relatively relative to the driving parts.
- the moving elements are spheres or cylinders.
- the displacement can be guided, controlled, with teeth present on the surface of the elements in relation, or accompanied by a deformation of the rolling element positioned in compression in space.
- the rolling elements are therefore in mechanical contact with the driving elements; they can be associated with sliding elements placed between them and that they train.
- the device furthermore comprises at least one conductive part and one conductive zone which are separated from each other by a variable distance according to the relative movement of the elements between them: if each of the parts and conductive zones is placed at an equipotential different, a variation of capacitance occurs during the actuation of the device.
- the device may comprise means for measuring these capacitance variations and / or transforming them, for example by electrostatic principle, into electrical energy.
- the conductive portion and the conductive zone may be located on the same element, or on two different elements; advantageously, several elements are in contact to form a conductive part making up the major part of the device, with the exception of the conductive zones.
- the separation between the part and the conductive zone can be carried out by insulating parts; it is also possible to have several conductive areas separated by insulating parts on the same element and / or whose distance can also vary during the displacement.
- the rolling elements may comprise insulating parts which, depending on their orientation, move the conductive regions away from or close to one another with the conductive part of the other element. drive, or isolate conductive portions of the rolling elements which may end up at different potentials or distances.
- the rolling elements are conductive and one of the driving elements at least as well: during the displacement, the rolling elements move away and get closer to conductive areas located along their direction of travel.
- the invention also relates to a method generating one or more variable capacities, which can be converted into electrical energy, by relative displacement of the elements of the device.
- the invention relates to the use of a motion assistance device, in particular a ball bearing or a bearing or a slide, to generate a variable capacity.
- a motion assistance device in particular a ball bearing or a bearing or a slide
- Various applications such as conversion to electrical energy are provided.
- Figures IA, IB, IC illustrate various motion assistance systems.
- Figures 2A, 2B, 2C show variants of an embodiment of a device according to the present invention.
- FIGS 3A and 3B show another variant of the device according to the invention.
- FIG. 4 illustrates an alternative embodiment of a device according to the invention.
- FIG. 5 shows another embodiment of a device according to the invention.
- Figure 6 illustrates another embodiment of a device according to the invention.
- FIGS. 7A, 7B, 7C show different views of another embodiment of a device according to the invention.
- a device 1 of the bearing or ball bearing type usually comprises two elements 2, rotating relative to one another without contact, secured to each of the moving parts of the system. , defining between them a space within which a or several driven elements 3, cylindrical or spherical rolling during the setting in motion.
- such a device 4 comprises two first elements 5 secured to the parts of the system, provided with teeth and movable in translation relative to one another, which define between them a space in which a second element 6 provided with teeth that can cooperate with those of the first drive elements 5 can rotate.
- FIG. 1A The rotational bearing of FIG. 1A can thus be produced as a sliding support, with two plane surfaces movable in translation, one parallel to the other, driving cylinders located between them, in the manner of displacement on wooden logs. .
- FIG. 1C Another embodiment, illustrated in FIG. 1C, concerns the presence of a guide cage for a spherical driven element 7 comprising relatively movable elements, here two movable rods 8 with respect to a third 9.
- all the elements 2, 5, 8, 9 or some of them may be part of the mechanical system as such, assistance being provided by the single driven member 3, 6, 7.
- the invention can be applied to all these devices, examples of which are illustrated in FIGS.
- the 14, 18 comprises a conductive zone which is electrically isolated, in particular by the presence of an insulating part, a conductive part of the device 10 which can be located at one or more other elements or within the same element. .
- a potential difference is thus achievable between the conductive zone of the element concerned and the conductive part of the device 10 as such.
- the conductive zone is separated from the conductive portion by a certain distance, and the device is arranged so that this distance varies during the relative displacement of the driving elements, and therefore of the rotation of the driven elements.
- the variation of the distance is coupled with a variation of the capacity of the whole area conductor / conductive part: during the relative movement of the elements 12, 14, 18 between them, a variation of the capacitance in time and / or in space is generated; it can be measured and / or converted into electrical energy by appropriate means, known for example from Meninger S et al. : “Vibration-to-electric Energy Conversion", IEEE Transactions on Very Large Scale Integration (VLSI) Systems; 2001, 9 (1): 64-76, which will not be described further.
- the conductive portion and the conductive area are separated by an insulating space whose dimensions vary physically, or by a fixed space that includes a discontinuous dielectric medium that can assume different relative orientations so that the resulting dielectric constant takes different values depending on the displacement.
- the dielectric medium comprises an insulating region and a conductive region, the conductive region being able to extend the zone (or part) of the conductor or to be separated from it, so that the path of the electrons in the insulating region located between the zone and the conductive part differs. depending on the location of the conductive region (see Figure 2A).
- conductive "zone” and “part” do not necessarily correspond to physical elements but may, depending on the operation of the device and the orientation of its constituent elements, correspond to different portions of the device according to the invention.
- the conductive zones can thus be integrated in a driving element, with alternating insulating parts in the direction of movement, or in the driven elements; the conductive part can completely compose the other elements, or even the entire device with the exception of the conductive zones and the insulating parts required.
- Distance variation can occur within the driven element, or because of its movement. The variation of the distance can be ensured by the appropriate positioning of insulating parts separating parts and conductive areas.
- the driving element 14, which is conductive is slidable parallel to the driving element 12, which is conductive and coated with an insulating layer 20; their relative rotational movement causes rolling elements 18, which may be spheres allowing any displacement of the drive elements 12, 14 relative to each other or cylinders allowing translation perpendicular to their axis.
- the rolling elements 18 comprise a conductive portion 18c and an insulating portion 18i; due to their rotation, the distance between the potential of the conductive zone 12 and that of the conductive portion 14 varies, according to the position of the conductive portion 18c which in fact extends the conductive portion 14 (which is to say that the constant resulting dielectric between the driving elements 12, 14 separated by a fixed distance varies).
- the capacity between the training elements 12, 14 therefore varies, which can be verified and measured by appropriate means; by electrostatic process, it is thus possible to convert a portion of the mechanical energy related to the displacement of the surfaces 12, 14 into electrical energy.
- the insulating 18i and conductive 18c parts if an electrical contact between the drive elements 12, 14 is not possible, for example if the insulating portion 18i comprises more than half of the circumference of the rolling element 18, it is possible not to coat an insulating layer 20 with one of the drive elements 12.
- An alternative embodiment of this embodiment may include fully conductive driven elements 18 which effectively extend the conductive portion of one of the drive members 14: FIG. 2B.
- the rolling elements 18 will alternate their passage over conductive areas 12c or insulating 12i, and the distance between the conductive portion 14, 18 and the conductive area 12c varies between the minimum thickness of the insulating layer 20 and more half the width of the insulating portion 12i, thereby generating a capacitance variation.
- a variant of this embodiment also makes it possible to create two variable capacities. in parallel: Figure 2C.
- the insulating parts 12i are here reduced to a thickness just sufficient to separate conductive areas 12ci and 12c2 connected to different equipotentials Vl and V2.
- the variation in capacitance is inherent in the fact that the driven element 18 brings the constant potential V closer to the first drive element 14, with an equipotential V1 or the other V2 of the second drive element 12, thus causing a variation in capacitance. between the potential V and the potentials V1 and V2; optionally, there may also occur a variation in capacitance between the different potentials V1 and V2 of the conductive parts 12c.
- the insulating parts 12i form regular lines perpendicular to the rolling direction of the driven elements 18, or a checkerboard if bidirectional displacement is allowed with rolling elements in spherical form.
- Other geometries are possible, with even more than two equipotentials for the same driving element 12.
- FIGS. 3A and 3B Another variant is illustrated in FIGS. 3A and 3B, in which one of the driving elements 12 comprises conductive zones 121, 122 "physically" separated.
- the spherical rolling elements 18 comprise insulating parts 18i which, depending on the orientation of the spheres, more or less cover the distance separating the conductive zones 121, 122 placed at different potentials.
- the driving element 14 moves parallel to the two drive bars 121, 122, it rolls the balls 18 whose conductive parts 18c are electrically connected by mechanical contact either to one or the other of the bars 121, 122, and are therefore to one or other of potential V1 and V2: the distance separating the two potentials V1 and V2 varies, as well as the capacitance.
- the shape and size of the insulating parts 18i of the driven element 18 can of course be adapted according to the desired results, for example to obtain more favorable effects to the variation of capacity between the conductive elements 18c of the various rolling elements 18.
- the rolling element 18 comprises a deformable cylinder or sphere containing conductive parts 18c, as shown in FIG. for example a polymer ball 18i metallized in places.
- the driving element 14 moves parallel to the driving element 12
- the deformation generates variations in distance, and therefore capacitance, between the different conductive parts 18c, which can generate electricity within the driven member 18, for example to be used to supply a sensor.
- the variation of capacity can take place inside the rolling elements 18 and / or between them, or between the driven and driving elements 12, 14, or inside the driving elements 12. , 14, or in the space 16.
- driven elements can be envisaged: solid or deformable cylinder, pinion or toothed cylinder, solid or deformable sphere; the drive elements 12, 14 are usually solid, made of conductive metal including any insulating parts.
- the rolling elements 18 may be made of insulating material partially metallized on the surface, or comprising conductive inserts, or they may comprise rigid insulating and conductive complementary parts.
- second sliding driven elements 28 with the driven elements 18 and of complementary shapes: FIG. 5.
- the relative position of the sliding elements 28 with respect to the driving elements 12, 14 varies only in the direction of movement, without combination with rotation.
- the rolling elements 18 have a different face to the sliding elements 28.
- the sliding elements 28 may have three zones 281, 282, 283 of different equipotentials Vl, V2, V3 (respectively 281 opposite and under the influence of the elements). 12, 14, and 282, 283 opposite and under the influence mainly of two consecutive rolling elements 18), the conductive parts of the driving elements 12, 14 and rolling 18 being at the same potential V.
- the capacity differs: there is a capacitance variation between V and V2 or V3.
- the different equipotentials Vl, V2, V3 all see, two by two, a variation in capacity to have electrical energy within the sliding element 28. It is of course possible to have a configuration between the sliding elements 28 and the driving surfaces of the elements 12, 14 such that a capacitance variation between V and V 1 is generated, possibly in phase with that generated between V 2 (or V 3) and V, so as to amplify the variation of ability between each of the potentials.
- an annular space 16 allows the guided rolling of driven elements 18 conductors by the relative rotation of the axis 14 relative to the driving element 12 conductor.
- the central portion 14 has insulating portions 14i for separating distributed conductive sectors such that in certain angular positions of the axis 14 relative to the ring 12, they form a large capacitance, and in others a low capacity, compared to the ring 12. If these conductive sectors are combined in two equipotentials Vl and V2, a temporal variation of the capacitance between the two equipotentials is obtained during the relative rotation of each of the elements 12, 14, 18 .
- a complementary displacement can be combined, with translation of the driving elements 12, 14 in a direction perpendicular to the axis of rotation. It is possible in this embodiment, as for that of FIG. 2C, to position a checkerboard or stripes on the outer surface of the axis 14. Moreover, if it is desired to have electric energy on the outside part 12, the roles can be reversed, with for example coating the inner surface of the ring 12 by a checkerboard.
- the rolling elements 18 and the drive surfaces 12, 14 are conductive and at the same potential V. Although shown flat, this configuration can be used for a "Ball bearing": the surfaces 12, 14 are then annular, for example with an annular space 16 of inner diameter 5.5 cm, and outer diameter 7.5 cm; in particular, it can have an outer rolling surface 14 of length 24 cm, for a width of 2.5 cm.
- the guide means 30 associated with one of the driving elements 12 are insulating, with the exception of conductive zones 32, isolated from each other, and positioned along the direction of movement of the rolling elements 18.
- the conductive zones can be integrated in the wall 30, or protrude; a minimum air gap must however be ensured during the movement between the conductive zones 32 and the rollers 18, at least for those which will be used to measure and / or use a variation of capacity.
- the gap h is of the order of 0.1 mm.
- guide means 34 may be positioned on either side of the other driving element 14, for example a protuberance.
- the driven elements 18 and drive 12, 14, 36 are at the same equipotential V.
- the elements 18 are driven in rotation and roll: they pass alternately in front of the conductive zones 32.
- the number of conductive zones 32 is a multiple of the number of rolling elements 18, by for example, six rolling elements 18 and twelve pairs of conductive zones 32 distributed homogeneously on each side along the circumference of the annular space 16; the spacing between the rolling elements 18 can be provided by inserts for example.
- the conductive areas 32 may be coupled to one or more equipotentials Vl, V2 differing from the equipotential V of the device 10, that is to say the drive elements 12, 14 and driven 18.
- the displacement of the rollers 18 generates and a capacitance variation between the conductive elements 32 and the equipotential V, variation that can be used to recover electrical energy; conversely, it is easy to use this structure 10 as an actuator by sequentially applying electrical voltages between the different conductive elements 32 and the different equipotential elements V.
- the usual techniques can be used to produce the devices 10 according to the invention, in particular the mechanical machining
- the minimum capacity in turn consists mainly of the surfaces facing the conductive elements 32 and the driving element
- Sizing can take a variety of values depending on the use: dimensions can in particular be greatly increased for truck-type vehicle axles, or strongly restricted for clock applications. Moreover, the variants of the various embodiments illustrated can be combined.
- the capacitance variation realized by one or more rolling elements set in rolling motion or sliding between at least two relatively movable surfaces relative to one another to generate electrical energy that can be used to power an electronic circuit, a sensor, or the like, by an electrostatic process.
- the variation of the capacitance can also be used in other types of applications, such as the realization of variable capacities for the electronics, the measurement directly as a sensor of the position of the rolling elements, the measurement of the angular position or the rotational speed of the armatures of a mechanical bearing ... It is thus possible to guide and feed a moving part by means of bearings whose rolling elements generate a variation of usable capacity to produce electrical energy. , and apply this principle to existing mechanical bearings.
- the devices according to the invention are capable of operating in reverse, that is to say to generate a mechanical movement from a source of electrical energy, and to realize a mechanical actuator.
- the rolling parts are, according to the invention, the object of a double use, of a guide mechanical and capacitive variation generator. They can also be deformable.
- the system according to the invention also makes it possible to recover the energy of a free rolling movement resulting from mechanical accelerations, a fluid movement, or the like.
- an axis rotating in a ball bearing according to the present invention causes, when subjected to accelerations, the setting in motion of the balls, as well as the outer ring due to its inertia; there is then appearance of a change in capacity transformable into electrical energy. It is thus possible to have energy on an axis, without connection with the outside, and it is no longer necessary to provide a particular power supply and electrical conductors to bring the electrical energy to the consumer device.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0552113A FR2888419B1 (en) | 2005-07-08 | 2005-07-08 | VARIABLE CAPACITY GENERATING DEVICE FOR GENERATING ELECTRIC ENERGY AND BALL BEARING MOTION ASSISTING DEVICE INCLUDING THE SAME |
PCT/EP2006/063983 WO2007006731A1 (en) | 2005-07-08 | 2006-07-06 | Device for assisting the variable capacity generating movement |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1902514A1 true EP1902514A1 (en) | 2008-03-26 |
Family
ID=36190644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06792484A Withdrawn EP1902514A1 (en) | 2005-07-08 | 2006-07-06 | Device for assisting the variable capacity generating movement |
Country Status (5)
Country | Link |
---|---|
US (1) | US8174163B2 (en) |
EP (1) | EP1902514A1 (en) |
JP (1) | JP5032471B2 (en) |
FR (1) | FR2888419B1 (en) |
WO (1) | WO2007006731A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2888419B1 (en) * | 2005-07-08 | 2010-12-03 | Commissariat Energie Atomique | VARIABLE CAPACITY GENERATING DEVICE FOR GENERATING ELECTRIC ENERGY AND BALL BEARING MOTION ASSISTING DEVICE INCLUDING THE SAME |
FR2889371A1 (en) | 2005-07-29 | 2007-02-02 | Commissariat Energie Atomique | DEVICE FOR CONVERTING MECHANICAL ENERGY IN ELECTRIC ENERGY BY CYCLE OF ELECTRICAL LOADS AND DISCHARGES ON THE CONNECTORS OF A CAPACITOR |
US7719164B2 (en) * | 2008-08-06 | 2010-05-18 | Honeywell International Inc. | Patterned dielectric elastomer actuator and method of fabricating the same |
FR2936351B1 (en) * | 2008-09-25 | 2010-10-15 | Commissariat Energie Atomique | VARIABLE CAPACITY SYSTEM WITH FLEXIBLE DIELECTRIC. |
US10333430B2 (en) * | 2014-11-25 | 2019-06-25 | Georgia Tech Research Corporation | Robust triboelectric nanogenerator based on rolling electrification |
US10958191B2 (en) | 2018-02-15 | 2021-03-23 | The Charles Stark Draper Laboratory, Inc. | Electrostatic motor |
EP4085520A4 (en) | 2020-01-03 | 2024-02-28 | C-Motive Technologies Inc. | Electrostatic motor |
JP2022162265A (en) * | 2021-04-12 | 2022-10-24 | トヨタ自動車株式会社 | actuator |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2266057A (en) | 1933-02-13 | 1941-12-16 | Massolle Joseph | Electrostatic converter |
US3107326A (en) * | 1960-05-25 | 1963-10-15 | High Voltage Engineering Corp | Variable capacitance electrostatic generator |
US3412318A (en) * | 1964-11-18 | 1968-11-19 | United Shoe Machinery Corp | Variable capacitor electric power generator |
US3414742A (en) | 1966-10-12 | 1968-12-03 | Marvin J. Fisher | Electrostatic energy converter |
US4225801A (en) * | 1979-05-15 | 1980-09-30 | Parker Jr Charles M | Electrostatic motor |
US4789802A (en) * | 1987-01-24 | 1988-12-06 | Japan Physitec Co., Ltd. | High voltage, multi-stage electrostatic generator |
US4871266A (en) * | 1987-06-24 | 1989-10-03 | Ngk Insulators, Ltd. | Slide assemblies |
JPS6412877A (en) * | 1987-07-02 | 1989-01-17 | Seiko Instr & Electronics | Electrostatic actuator |
JPH01107667A (en) * | 1987-10-19 | 1989-04-25 | Sanyo Electric Co Ltd | Electrostatic motor |
US4922164A (en) * | 1988-10-03 | 1990-05-01 | Sarcos Group | Eccentric motion motor |
US5237234A (en) * | 1988-10-13 | 1993-08-17 | At&T Bell Laboratories | Harmonic electrostatic motor |
ES2020013A6 (en) * | 1988-10-20 | 1991-07-16 | Univ Madrid Nac Educacion | Rotating triboelectric generator |
US5093594A (en) * | 1990-06-22 | 1992-03-03 | Massachusetts Institute Of Technology | Microfabricated harmonic side-drive motors |
JPH05300759A (en) * | 1992-04-17 | 1993-11-12 | Yaskawa Electric Corp | Electrostatic actuator |
JP2000152669A (en) * | 1998-11-05 | 2000-05-30 | Panetto:Kk | Micro actuator |
US6218803B1 (en) * | 1999-06-04 | 2001-04-17 | Genetic Microsystems, Inc. | Position sensing with variable capacitance transducers |
JP2002083736A (en) * | 2000-09-11 | 2002-03-22 | Murata Mfg Co Ltd | Variable capacitor |
GB0114711D0 (en) | 2001-06-15 | 2001-08-08 | South Bank Univ Entpr Ltd | Portable electricity generator |
FR2888419B1 (en) * | 2005-07-08 | 2010-12-03 | Commissariat Energie Atomique | VARIABLE CAPACITY GENERATING DEVICE FOR GENERATING ELECTRIC ENERGY AND BALL BEARING MOTION ASSISTING DEVICE INCLUDING THE SAME |
-
2005
- 2005-07-08 FR FR0552113A patent/FR2888419B1/en not_active Expired - Fee Related
-
2006
- 2006-07-06 EP EP06792484A patent/EP1902514A1/en not_active Withdrawn
- 2006-07-06 US US11/994,125 patent/US8174163B2/en not_active Expired - Fee Related
- 2006-07-06 WO PCT/EP2006/063983 patent/WO2007006731A1/en not_active Application Discontinuation
- 2006-07-06 JP JP2008519942A patent/JP5032471B2/en not_active Expired - Fee Related
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2007006731A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20080211342A1 (en) | 2008-09-04 |
US8174163B2 (en) | 2012-05-08 |
WO2007006731A1 (en) | 2007-01-18 |
JP5032471B2 (en) | 2012-09-26 |
JP2009500995A (en) | 2009-01-08 |
FR2888419A1 (en) | 2007-01-12 |
FR2888419B1 (en) | 2010-12-03 |
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