Montres Breguet S.a.

The Swatch Group Research and Development Ltd

Nivarox-far S.a.

Bien-air Holding Sa

Bien-air Holding Sa C/o Bien-air Dental Sa

Eta Sa Manufacture Horlogere Suisse

Davide Sarchi

Polychronis Nakis Karapatis

Benoit Legeret

Younes Kadmiri

Alain Zaugg

Thierry Hessler

Marc Stranczl

Nakis Karapatis

Sylvain Marechal

Deirdre Lenoir

Jerome Favre

Benoit Junod

Jean-Philippe Rochat

Andres Cabezas Jurin

Gianni Di Domenico

Jan Pittet

Sebastian Alagon Carrillo

Sylvain Dauby

Stephane Beugin

Fabio Sciascia

Olivier Karlen

Arnaud Todeschini

Jean-Jacques Born

Jean-Luc Helfer

Thierry Conus

Pascal Winkler

Marco Verardo

Dominique Lechot

Eric Goeller

Jérôme Favre

Andrés Cabezas Jurin

Patrick Ragot

Rene Piguet

Sébastien Juillerat

Benoît Légeret

Stéphane Cadau

Gaël Guerlesquin

Sylvain Maréchal

Yann Gâteau

Myriam Mosimann

Stéphane Beugin

Fabio Bernasconi

Marco Gallina

Yvan Brasey

Daniel Nicolet

Corentin Zill

Philippe Poux

Camille Tadla

Thomas Frangne

Sébastien Fontaine

Andres Cabezas-Jurin

Simon Sancet

Yoanne Besson

Joel Douffet

Marco Mario Colangelo

Benoît Junod

Benoît LÈGERET

Sylvain MARÉCHAL

Stefano Besio

Andrea Marchiani

Deirdré Lenoir

Sebastián Alagón Carrillo

Benoît Legeret

Yann GÂTEAU

Dominique Léchot

Edgar Schönbächler

A handpiece suitable for dental or chirurgical applications, including a device for clamping a drilling tool, able to be actuated in rotation about an axis of rotation by a drive mechanism. The drive mechanism has a drive shaft rotatable about the said axis of rotation. The clamping device includes a clamp disposed inside the drive shaft for axially securing the drilling tool with respect to the axis of rotation, the clamp co-operating with a plunger for releasing the drilling tool, as well as a radial guide bush of the drilling tool, rotating integrally with the drive shaft. A selective angular coupling mechanism exerting an angular holding torque between the clamp and the guide bush or respectively the drive shaft, the value of which being inferior to that corresponding to the slip threshold between the said clamp and the drilling tool.

Selective coupling device for a collet chuck

The present invention relates to a chucking device for a drilling tool for a dental handpiece, as well as a handpiece for dental or surgical applications comprising:—a head () in which is inserted in removable fashion a drilling tool () able to be actuated in rotation about an axis of rotation (R) by means of a drive mechanism comprising a drive shaft () rotating about this axis of rotation (R)—a clamping device for the drilling tool (), comprising a chucking clamp () disposed inside said drive shaft () for axial retention of the drilling tool () with respect to the axis of rotation (R), the clamp () co-operating with a plunger (), and—a push-button () arranged to act upon the plunger () in order to release the drilling tool (); The handpiece () contains a permanent magnet () arranged symmetrically around the axis of rotation (R) and exerting a force of magnetic attraction (F) on the plunger () in direction of the push-button ().

Assisted tightening device for handpiece

The present invention concerns a control system () for a micro-motor for dental or surgical use comprising a control box () provided with an adjustment knob (), mounted in a way rotatable about a rotational axis (A-A). The adjustment knob () is made up of a control support () integral with an encoder () integrated in the said box (), and a sterilizable button () coupled in a removable way to the said control support ().

Control system with removable sterilizable button

The present invention relates to a device and a method for measuring osseous quality.

Method and tool for measuring osseous quality

A bimetallic device, the difference in expansion coefficient of which is between 10 and 30 10K, for providing a resonator with thermal compensation via the balance wheel.

Bimetallic device sensitive to temperature variations

A timepiece movement with a movable element capable of being momentarily immobilized in any one of N discrete positions, and with a device including a lever and a first magnet integral with the lever, with N second magnets integral with the movable element and arranged along an axis of displacement, and with a magnetically permeable element arranged facing one polar end of the first magnet located on the side of the movable element. The polarity of the first magnet is reversed with respect to that of the second magnets. A first magnetic torque exerted on the lever has a first direction over a first section and a second direction, opposite to the first direction, over a second section of the distance between two successive stable positions, the first direction defining a return torque towards the movable element for a contact portion of the lever.

Timepiece movement provided with a device for positioning a moveable element in a plurality of discrete positions

A timepiece movement includes a date ring having display positions, and a device for positioning the ring in a display position. The positioning device includes a lever and a first fixed magnet, a second magnet integral with the lever and a magnetic structure integral with the ring and moving between the two magnets, this magnetic structure being formed of a magnetically permeable material and having a radial dimension that varies periodically to define periods corresponding to the distances between the display positions. The magnetic axes of the two magnets are substantially aligned and their respective polarities are opposite. The magnetic torque applied to the lever can vary, so that it is pressed against the ring in the display positions but tends to move away from the ring on one part of the angular movement between these display positions.

Timepiece movement provided with a device for positioning a movable element in a plurality of discrete positions

Sub-assembly for watches, including an arbor including a magnetized or electrically charged surface pivoting inside a housing, and a pole piece subjecting this surface to a magnetic or electrostatic field about an axis, one pole piece cooperating axially with this surface to absorb a shock and then return the arbor to an operating position, and creating, in proximity to this surface, a magnetic or electrostatic field, which radially attracts the arbor towards a wall of the housing.

Magnetic anti-shock system for a timepiece arbor

Timepiece movement including a mechanism, a spring barrel for driving the mechanism, and an equalization device connected to the spring barrel. The spring barrel includes a drum and a motor spring to exert a driving torque which is variable as a function of the degree of winding-up of the motor spring. The equalization device is driven by the spring barrel and exerts an auxiliary torque which varies as a function of the degree of winding-up of the motor spring to counter variations in the motor torque. The equalization device includes a first and second magnetic elements being displaced from each other by exerting a magnetic force which varies as a function of the relative position of the first and second magnetic elements and produces the auxiliary torque.

Timepiece movement comprising a device for equalising a motor torque

The timepiece includes a chronograph mechanism with a coupling device including an operating member and a switching member which can be switched alternately between two stable positions coupled state and uncoupled state. This timepiece includes a magnetic system formed of a first bipolar magnet fixed to the switching member, a second bipolar magnet fixed to the support of the switching device in order to continually offer a magnetic interaction with the first bipolar magnet, and at least one highly magnetically permeable element forming the operating member and able to undergo a reciprocating motion between two operating positions. The switching device is arranged so that, when the highly magnetically permeable element is in its first operating position, the two magnets generate between them a force of magnetic repulsion and so that, when the highly magnetically permeable element is in its second operating position, the two magnets generate between them a force of magnetic attraction.

Timepiece comprising a device for switching a timepiece mechanism

The gong is made with a wire or a strip having an atypical shape for a watch striking mechanism. The gong includes a rectilinear part connected to a curved part. The rectilinear part and/or the curved part are connected to the same gong-carrier. The gong includes several notches made at defined geometric points on a portion of the length of the gong to adapt the natural vibration frequencies within an audible range between 1 kHz and 5 kHz, so that the sound produced by the vibrating gong is harmonious.

Atypical gong, watch with striking mechanism comprising the same and gong manufacturing method

A method for maintaining and regulating frequency of a timepiece resonator mechanism around its natural frequency, the method including: at least one regulator device acting on the resonator mechanism with a periodic motion, to impose a periodic modulation of resonant frequency or quality factor or a position of a point of rest of the resonator mechanism, with a regulation frequency between 0.9 times and 1.1 times the value of an integer multiple of the natural frequency, the integer being greater than or equal to 2 and less than or equal to 10, and the periodic motion imposes a periodic modulation of the quality factor of the resonator mechanism, by acting on losses and/or damping and/or friction of the resonator mechanism.

Method for maintaining and regulating the frequency of a timepiece resonator

A musical timepiece includes a gong fastened to a structure or a resonator of a watch case, the resonator rigidly assembled to the structure around a chamber, by lugs allowing vibration of the resonator within a determined frequency range, the chamber enclosing a sealing element forming with the lugs the only mechanical connection between the structure and the resonator. The structure or the resonator includes a groove receiving a gasket in contact with the structure and the resonator The structure structure or the resonator or the sealing element includes a rigid protruding relief portion compressing a gasket in its groove, with a hardness less than 20 Shore A, for minimum damping of the vibration of the resonator.

Striking or musical timepiece with a resonant bezel

Method for maintaining and regulating a timepiece resonator

A timepiece oscillator includes a sprung balance assembly including a balance with a rim, which is returned by a balance spring and pivoted with respect to a structure, on a first side by a torsion wire, fixed by an anchoring element to the structure, and on a second side, opposite to the first side, by a contactless magnetic pivot. The balance includes a first pole embedded with the balance and the torsion wire, this first pole having a symmetry with respect to the axis of the sprung balance assembly, and cooperating with a second pole included in the structure, for the magnetic suspension of the first pole, and to exert on the distal end of the torsion wire, opposite to this anchoring element, a magnetic force for tensioning the torsion wire.

Hybrid timepiece oscillator

Growing community of inventors

Renens, Switzerland

Davide Sarchi