EP3128380B1 - Mécanisme régulateur d'horlogerie à bras rotatifs synchronisé magnétiquement - Google Patents

Mécanisme régulateur d'horlogerie à bras rotatifs synchronisé magnétiquement Download PDF

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Publication number
EP3128380B1
EP3128380B1 EP15179711.5A EP15179711A EP3128380B1 EP 3128380 B1 EP3128380 B1 EP 3128380B1 EP 15179711 A EP15179711 A EP 15179711A EP 3128380 B1 EP3128380 B1 EP 3128380B1
Authority
EP
European Patent Office
Prior art keywords
inertia
regulating mechanism
arm
mechanical
inertia arm
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.)
Active
Application number
EP15179711.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3128380A1 (fr
Inventor
Pascal Winkler
Jean-Jacques Born
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.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
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
Application filed by ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to CH01127/15A priority Critical patent/CH711402A2/fr
Priority to EP15179711.5A priority patent/EP3128380B1/fr
Priority to JP2016145173A priority patent/JP6255067B2/ja
Priority to US15/220,024 priority patent/US9785116B2/en
Priority to CN201610626625.8A priority patent/CN106444335B/zh
Priority to RU2016131904A priority patent/RU2703096C1/ru
Publication of EP3128380A1 publication Critical patent/EP3128380A1/fr
Application granted granted Critical
Publication of EP3128380B1 publication Critical patent/EP3128380B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/045—Oscillators acting by spring tension with oscillating blade springs
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/08—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C5/00—Electric or magnetic means for converting oscillatory to rotary motion in time-pieces, i.e. electric or magnetic escapements
    • G04C5/005—Magnetic or electromagnetic means

Definitions

  • the invention relates to a timepiece control mechanism comprising a plate and, movably mounted at least in pivoting movement relative to said plate, an escapement that pivots about an exhaust axis and is subjected to a torque motor, and at least a first resonator comprising a first rigid structure connected to said plate by first resilient return means, said first rigid structure carrying at least one inertial arm including a first inertial arm arranged to cooperate with said exhaust mobile by intermediate magnetized tracks and / or electrified that comprise both said at least a first inertial arm and said exhaust mobile, to form a synchronization device between said exhaust mobile and said at least a first resonator.
  • the invention also relates to a watch movement comprising at least one such regulating mechanism.
  • the invention also relates to a timepiece comprising such a movement or such a regulating mechanism.
  • the invention relates to the field of watchmaking mechanisms, in particular watchmaking exhaust mechanisms, and more particularly to the field of non-contact exhausts.
  • the document EP 2889704A2 in the name of Nivarox-FAR SA describes a clockwork escapement mechanism, comprising an escapement wheel subjected to a pivoting torque, of moment less than or equal to a nominal moment, around a first pivot axis, and a resonator integral with a regulating mobile mounted pivoting about a second axis of real or virtual pivoting, said escapement wheel comprising a plurality of actuators regularly spaced on its periphery, and each arranged to cooperate directly with at least a first the track of said mobile controller, characterized in that each said actuator comprises first barrier or electrostatic stop means and arranged to cooperate with said first track which is magnetized, respectively electrified, or ferromagnetic, or respectively electrostatic conductor, to exert on said first track a moment torque greater than said nominal moment, and still more characterized in that each said actuator further comprises second stop means arranged to constitute a stroke limiting stop, arranged to form an autonomous exhaust mechanism with at least a first abutment complementary surface that includes said
  • a clockwork escapement mechanism has a retainer between a resonator on the one hand, and two exhaust moters each subjected to a torque, on the other hand, characterized in that each said mobile escapement comprises at least one magnetized or ferromagnetic track, respectively electrified or electrostatically conductive, with a running period in which its magnetic characteristics, respectively electrostatic, are repeated, said stop having at least one magnetized or ferromagnetic polar mass, respectively electrified or electrostatically conductive, said polar mass being movable in a direction transverse to the direction of travel of at least one element of a surface of said track, and minus said polar mass or said track creating a magnetic or electrostatic field in an air gap between said at least one polar mass and said at least one surface, and further characterized in that said polar mass is opposed to a magnetic or electrostatic field barrier on said track just before each transverse movement of said stop controlled by the periodic
  • the document US 3183426A in the name of HAYDON ARTHUR describes an all-magnetic escapement comprising a magnetic escape wheel, in which the energy varies continuously and progressively between a minimum and a maximum when the wheel rotates over a half-period then the energy returns to its value minimum on the next half-period.
  • the magnetic force on the wheel varies gradually between a minimum (negative) and a maximum (positive) over an angular period.
  • the document EP 2990885A1 in the name of ETA SA describes a mechanical watch movement with a resonator, an exhaust associated with this resonator, and a display of at least one time information that is driven by a mechanical engine device via a counter wheel whose running is clocked by the 'exhaust. At least the resonator is housed in a chamber in which there is a reduced pressure relative to the atmospheric pressure.
  • the escapement is a magnetic escapement comprising an escape wheel coupled directly or indirectly to the resonator via a non-contact magnetic coupling system, this magnetic coupling system being formed in such a way that a non-magnetic wall of the enclosure passes through the magnetic exhaust, so that a first part of this exhaust is located inside the enclosure while a second part of this exhaust is located outside of this enclosure.
  • the document EP2221676A1 in the name of MONTRES BREGUET SA describes a timepiece including a chronograph whose hands are driven by a first gear train causing in turn a first resonator, and a watch the needles are driven by a second wheel independent of the first, the second wheel in turn driving a second resonator, wherein the first and second wheels are driven from a single source of energy.
  • the invention proposes to remedy this deficiency of the state of the art, by developing a watch, including a mechanical watch, provided with a rotary arm regulator, synchronized magnetically, and equipped with an anti-stall mechanical.
  • the invention relates to a regulating mechanism according to claim 1.
  • the invention also relates to a watch movement comprising at least one such regulating mechanism.
  • the invention also relates to a timepiece comprising such a movement.
  • the invention proposes to develop a mechanical regulator, comprising resonators having a high quality factor, a high frequency, and / or low amplitudes, while increasing the efficiency of the exhaust and without giving up its robustness to shocks.
  • the invention relates to a watchmaking mechanism 200 comprising a plate 1 and mounted movable at least in pivoting movement relative to the plate 1, an exhaust mobile 10 and at least a first resonator 100.
  • the escapement wheel 10 is here illustrated, without limitation, by an escape wheel. It pivots around an exhaust axis D0, and is subjected to a driving torque, from an accumulator such as a cylinder or the like.
  • At least one first resonator 100 comprises a first rigid structure 110, which is connected to the plate 1 by first elastic return means 120.
  • This first rigid structure 110 carries at least one inertial arm 130 or 140. It also carries, at the end of arm 111, masses of inertia 112 carrying inertia adjusting and balancing screws 113.
  • the figure 1 shows a first inertial arm 130, which is arranged to cooperate with the escapement mobile 10 via magnetized tracks and / or electrified that comprise both the at least one first inertial arm 130 and the mobile escape 10 , to form a synchronization device between the escapement wheel 10 and the at least one first resonator 100.
  • This arm 130 comprises a polar mass carrying distal end carried by a rod 115.
  • the synchronization device is protected from stalling during an accidental increase in torque by a mechanical anti-stall mechanism comprising mechanical exhaust stops 12 carried by the escape wheel 10, and by at least one mechanical stop of inertial arm 132, carried by the at least one first inertial arm 130, and arranged together for a stop abutment hold in such case of accidental increase in torque.
  • a mechanical anti-stall mechanism comprising mechanical exhaust stops 12 carried by the escape wheel 10, and by at least one mechanical stop of inertial arm 132, carried by the at least one first inertial arm 130, and arranged together for a stop abutment hold in such case of accidental increase in torque.
  • the at least one first inertial arm 130 pivots around a first virtual axis D1.
  • Such so-called mechanical stops of inertial arm 132 which includes the inertial arm 130, each extend in a direction substantially tangent to the swing oscillation race of the inertial arm 130 around the first virtual axis D1.
  • the first virtual axis D1 is located at the intersection, in projection on the plane of the plate 1, of flexible blades 121 and 122 that comprise the first elastic return means 120.
  • the first virtual axis D1 is situated at the rest position of a single flexible blade 125 which constitutes the first elastic return means 120.
  • the magnetized and / or electrised track that comprises the at least one first inertial arm 130 comprises at least a first polar mass of inertial arm 131A and a second polar mass of inertial arm 131B , alternating, which extend on either side of a radial R from the first virtual axis D1, and on either side of a common perpendicular T to the radial R.
  • At least one magnetized and / or electrified track which comprises the escape wheel 10, comprises an alternation of exhaust polar masses 11 and exhaust mechanical stops 12, at the same angular pitch ⁇ with respect to the exhaust axis D0.
  • the total space, along the radial R, of a group formed by a first polar mass of inertial arm 131A and a second polar mass of inertial arm 131B consecutive, along the radial R is substantially equal to a linear pitch P which is the projection on the radial R of the angular pitch a.
  • the separation, along the radial R, mechanical stops of inertial arm 132 corresponding to the same group is substantially equal to half of this linear pitch P.
  • the first rigid structure 110 still carries at least a second inertial arm 140 that includes a second resonator 150.
  • This second inertial arm 140 pivots around a second virtual axis D2, and is arranged as the first inertial arm 130, to cooperate with the escapement mobile 10 via magnetized tracks and / or electrified that comprise both the second inertial arm 140 and the exhaust mobile 10.
  • the assembly consisting of the first resonator 100 and the second resonator 150 form then a tuning fork.
  • the mechanical anti-stall mechanism comprises at least a second mechanical stop of inertial arm 142 carried by the second inertial arm 140. Nevertheless, the mechanism can operate with the only first stop of the first arm 130.
  • the first inertial arm 130 and the second inertial arm 140 each comprise a fastener 133, respectively 143, of at least one flexible blade 135, respectively 145, the flexible blades 135, 145 respectively. , being fixed at their other end to the first rigid structure 110 constituted by the same connecting piece 20, comprising a bending zone 21, here collar type, just at the rigid attachment to the plate, and attached to the plate 1 at a recess 2.
  • the first inertial arm 130 and the second inertial arm 140 are arranged to vibrate in phase opposition with each other. It is in this configuration that the quality factor is the best.
  • the first inertial arm 130 and the second inertial arm 140 are arranged on either side of the escapement wheel 10, and each comprise at least one pair consisting of a polar mass of inertial arm 131, 141, and of a mechanical stop of inertial arm 132, 142, arranged to cooperate alternately with the runway of the escape wheel 10.
  • At least one magnetized and / or electrified track included in the escapement wheel 10 comprises an alternation of exhaust polar masses 11 and exhaust mechanical stops 12 at the same angular pitch ⁇ , and in each pair , the angular distance, in projection on the same plane perpendicular to the exhaust axis D0, between the polar mass of inertial arm 131, 141, and the mechanical stop of inertial arm 132, 142, is equal to half of this angular step ⁇ .
  • first inertial arm 130 and the second inertial arm 140, and the flexible blades 135, 145 extend in directions substantially parallel to each other and orthogonal to that of the connecting piece 20.
  • each inertial arm 130, 140 is arranged to cooperate with the mobile exhaust 10 continuously, without periodic stop of the mobile escape 10.
  • the regulating mechanism 200 constitutes a Lepaute-type escapement mechanism, in which the escapement device 10 comprises a half-pin forming a mechanical exhaust stop 12 close to each polar exhaust mass 11 that the mobile exhaust system 10, and wherein the at least one first inertial arm 130 comprises a mechanical stop of inertial arm 132A, which is the inner surface of a first compass leg, and another mechanical stop of inertial arm 132B corresponding to the not next which is the outer surface of a second branch of compass.
  • the inner surface of the first compass leg and the outer surface of the second compass leg are separated by a space of greater width than the radius of the half-pin.
  • the mechanical stop system is coplanar and comprises at least one finger arranged to cooperate radially with a toothed wheel.
  • each inertial arm 130, 140 is less than 20 °.
  • At least one of the inertial arms 130, 140 of the tuning fork carries two magnetic pallets.
  • the two inertial arms 130, 140 of the tuning fork each carry at least one magnetic paddle.
  • At least one of the inertial arms 130, 140 of the tuning fork carries two anti-stall mechanical pallets.
  • the two inertial arms 130, 140 of the tuning fork each carry at least one mechanical anti-stall pallet.
  • the regulating mechanism 200 comprises at least two inertial arms 130, 140, rotating whose phase shift of one with respect to the other is controlled by a mechanical connection.
  • the figure 7 illustrates the mechanical phase-shift control connection comprising a groove-pin mechanism, with a pin 31 integral with a 130 of the two inertial arms 130, 140, sliding in a groove 32 of a fitting 33 secured to the other 140 of the two inertial arms 130, 140.
  • the figure 7 illustrates the variant comprising at least one gear sector 34, 35, arranged to synchronize symmetrical movements of the inertial arms 130, 140, with a first toothed sector 34 integral with a 130 of the two inertial arms 130, 140, meshing permanently with a second sector gear 35 secured to the other 140 of the two inertial arms 130, 140.
  • the figure 9 illustrates a flexible mechanical connection comprising flexible blades 36, 37, joining in cross the opposite ends of the two inertial arms 130 and 140.
  • the connecting piece 20 of the two arms of the tuning fork is connected to the plate 1 by a viscoelastic component or polyurethane, arranged to dissipate the reaction forces to the support due to a possible transient mode of "windshield wiper" type.
  • tuning fork when the inertial arms 130, 140 have a substantially synchronous movement.
  • the connecting piece 20 of the two arms of the tuning fork is connected to the plate 1 by a friction mechanism, coupled to an elastic return means in the neutral position, and arranged to dissipate reaction forces at the support due to a possible transient mode of "wiper" type of tuning fork when the inertial arms 130, 140, have a substantially synchronous movement.
  • At least one component of mechanical anti-stall mechanism is made of a shock-absorbing material, so as to avoid bouncing.
  • At least one component of said mechanical anti-stall mechanism is a thin pallet, integral with an inertial arm 130, 140, and in an arc substantially concentric with the pivot axis, real or virtual , of the inertial arm 130, 140, which carries it.
  • the mechanical anti-stall mechanism comprises at least one set formed by a pallet of an inertial arm 130, 140, arranged to cooperate in the abutment position with an anchor of the escapement mobile 10. And the pallets and pins of the anti-stall are arranged to intercept in case of forced pivoting of the mobile escape 10 while the at least one first resonator 100 is maintained in its equilibrium position.
  • the first elastic return means 120 comprise at least one flexible strip of oxidized silicon to thermally compensate for frequency variations.
  • the synchronization is magnetic.
  • the regulator mechanism 200 constitutes a regulation and exhaust mechanism.
  • the invention also relates to a clockwork movement 300 comprising at least one such regulating mechanism 200.
  • the invention also concerns a timepiece 400 comprising such a movement 300, or comprising at least one such regulating mechanism 200.
  • the advantage of the invention is to reconcile the high efficiency offered by a magnetic synchronization system (more than 90%), while eliminating its main defect, namely, the stall in case of high torque. Reliability is therefore improved without impairing performance performance.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Micromachines (AREA)
  • Electric Clocks (AREA)
  • Gears, Cams (AREA)
EP15179711.5A 2015-08-04 2015-08-04 Mécanisme régulateur d'horlogerie à bras rotatifs synchronisé magnétiquement Active EP3128380B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CH01127/15A CH711402A2 (fr) 2015-08-04 2015-08-04 Mécanisme régulateur d'horlogerie à bras rotatifs synchronisé magnétiquement.
EP15179711.5A EP3128380B1 (fr) 2015-08-04 2015-08-04 Mécanisme régulateur d'horlogerie à bras rotatifs synchronisé magnétiquement
JP2016145173A JP6255067B2 (ja) 2015-08-04 2016-07-25 磁気によって同期される回転アームを有する時計用調速機構
US15/220,024 US9785116B2 (en) 2015-08-04 2016-07-26 Timepiece regulating mechanism with magnetically synchronized rotating arms
CN201610626625.8A CN106444335B (zh) 2015-08-04 2016-08-03 具有磁性同步旋转臂的钟表调速机构
RU2016131904A RU2703096C1 (ru) 2015-08-04 2016-08-03 Регулирующий часовой механизм с магнитно-синхронизированными поворотными рычагами

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15179711.5A EP3128380B1 (fr) 2015-08-04 2015-08-04 Mécanisme régulateur d'horlogerie à bras rotatifs synchronisé magnétiquement

Publications (2)

Publication Number Publication Date
EP3128380A1 EP3128380A1 (fr) 2017-02-08
EP3128380B1 true EP3128380B1 (fr) 2018-11-21

Family

ID=64270565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15179711.5A Active EP3128380B1 (fr) 2015-08-04 2015-08-04 Mécanisme régulateur d'horlogerie à bras rotatifs synchronisé magnétiquement

Country Status (6)

Country Link
US (1) US9785116B2 (zh)
EP (1) EP3128380B1 (zh)
JP (1) JP6255067B2 (zh)
CN (1) CN106444335B (zh)
CH (1) CH711402A2 (zh)
RU (1) RU2703096C1 (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3032352A1 (en) * 2014-12-09 2016-06-15 LVMH Swiss Manufactures SA Timepiece regulator, timepiece movement and timepiece having such a regulator
CH710524A2 (fr) * 2014-12-18 2016-06-30 Swatch Group Res & Dev Ltd Résonateur d'horlogerie à lames croisées.
ES2698115T3 (es) * 2015-12-16 2019-01-31 Sa De La Manufacture Dhorlogerie Audemars Piguet & Cie Mecanismo de regulación de una velocidad media en un movimiento de relojería y movimiento de relojería
EP3208667A1 (fr) * 2016-02-18 2017-08-23 The Swatch Group Research and Development Ltd Mobile d'echappement magnetique d'horlogerie
EP3336613B1 (fr) * 2016-12-16 2020-03-11 Association Suisse pour la Recherche Horlogère Resonateur pour piece d'horlogerie comportant deux balanciers agences pour osciller dans un meme plan
CH713960B1 (fr) * 2017-07-07 2023-08-31 Eta Sa Mft Horlogere Suisse Elément sécable pour oscillateur d'horlogerie.
CN112236901A (zh) * 2018-04-23 2021-01-15 约翰·梅扎林瓜联合股份有限公司 带有简化的驱动机构的紧凑式天线移相器
EP3561604B1 (fr) * 2018-04-25 2020-10-28 The Swatch Group Research and Development Ltd Mécanisme régulateur d'horlogerie à résonateurs articulés
EP3579058B1 (fr) * 2018-06-07 2021-09-15 Montres Breguet S.A. Piece d'horlogerie comprenant un tourbillon
EP3627242B1 (fr) 2018-09-19 2021-07-21 The Swatch Group Research and Development Ltd Mecanisme d'echappement d'horlogerie magneto-mecanique optimise
EP3663868B1 (fr) * 2018-12-07 2021-09-08 Montres Breguet S.A. Mouvement d'horlogerie comportant un tourbillon avec une roue magnetique fixe
CH716677B1 (fr) * 2019-10-08 2022-10-31 Richemont Int Sa Balancier à moment d'inertie variable.

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US2762222A (en) * 1949-05-28 1956-09-11 Clifford Cecil Frank Magnetic escapement mechanism
US2750730A (en) * 1952-03-20 1956-06-19 Ingraham E Co Shock and vibration proof oscillator
US3183426A (en) * 1962-02-14 1965-05-11 Cons Electronics Ind Magnetically coupled constant speed system
JPS4514755Y1 (zh) * 1967-08-14 1970-06-22
US3487630A (en) * 1967-09-28 1970-01-06 Us Time Corp The Balance mechanism for an electronic watch
JP4462190B2 (ja) * 2003-09-25 2010-05-12 セイコーエプソン株式会社 時計
CH700459A2 (fr) * 2009-02-24 2010-08-31 Montres Breguet Sa Pièce d'horlogerie comportant un chronographe et une montre.
EP2790067A1 (fr) * 2013-04-12 2014-10-15 Montres Breguet SA Système d'échappement pour un résonateur balancier-spiral
CH709061A2 (fr) * 2013-12-23 2015-06-30 Swatch Group Res & Dev Ltd Mécanisme d'échappement naturel.
EP2889704B1 (fr) * 2013-12-23 2017-11-08 Nivarox-FAR S.A. Mécanisme d'échappement à cylindre d'horlogerie sans contact
CH709031B1 (fr) * 2013-12-23 2021-01-29 Swatch Group Res & Dev Ltd Dispositif régulateur de la vitesse angulaire d'un mobile dans un mouvement horloger comprenant un échappement magnétique.
EP2887156B1 (fr) * 2013-12-23 2018-03-07 The Swatch Group Research and Development Ltd. Dispositif régulateur
EP3299907A1 (fr) * 2013-12-23 2018-03-28 ETA SA Manufacture Horlogère Suisse Mouvement horloger mécanique à échappement magnétique

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Also Published As

Publication number Publication date
US20170038730A1 (en) 2017-02-09
RU2703096C1 (ru) 2019-10-15
CN106444335B (zh) 2018-11-16
JP6255067B2 (ja) 2017-12-27
US9785116B2 (en) 2017-10-10
EP3128380A1 (fr) 2017-02-08
CN106444335A (zh) 2017-02-22
CH711402A2 (fr) 2017-02-15
JP2017032553A (ja) 2017-02-09

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