Patents Assigned to Comadur S.A.
  • Publication number: 20190146416
    Abstract: A method for manufacturing a hole jewel, including forming a precursor from a mixture of at least one powder material with a binder; pressing the precursor, with upper lower dies, to form a green body of the future hole jewel including a blind cavity having a height between a height of the green body and a height of the future hole jewel, the cavity being provided with upper and lower portions respectively including blanks of a through hole and of a functional element of the future hole jewel; sintering the green body to form a body of the future hole jewel; machining the body, including a first sub-step of shaping a top of the body, during which a height of the upper portion is configured in readiness for an opening in the through hole blank for connecting the functional element to the upper surface, and a second sub-step of shaping a base of the body to form a lower surface of the hole jewel for connecting the functional element to to the lower surface.
    Type: Application
    Filed: October 25, 2018
    Publication date: May 16, 2019
    Applicant: Comadur S.A.
    Inventors: Bruno Besutti, Thierry Cordier, Pascal Chopard-Lallier
  • Publication number: 20190022895
    Abstract: Method for cutting crystal boules using diamond wire, wherein this boule is driven about a main axis, a cutting wire is held taut and driven through a temporary drum immobilising each boule in position with respect to the main axis throughout the entire cutting operation, this temporary drum being made by overmoulding a coating material on at least one boule bonded onto a sacrificial core, the cutting being followed by the slicing of cut rings from which are detached, particularly using heat, crystalline plates with parallel faces.
    Type: Application
    Filed: May 24, 2018
    Publication date: January 24, 2019
    Applicant: COMADUR S.A.
    Inventors: Naser BERISHA, Roland Dechant-Wagner, Christian Russi
  • Publication number: 20180312674
    Abstract: A binder for an injection moulding composition includes: from 35 to 54% by volume of a polymeric base, from 40 to 55% by volume of a mixture of waxes, and approximately 10% by volume of a surfactant, wherein the polymeric base contains copolymers of ethylene and methacrylic or acrylic acid, or copolymers of ethylene and vinyl acetate, or copolymers of ethylene including maleic anhydride or a mixture of these copolymers, as well as polyethylene, polypropylene and acrylic resin.
    Type: Application
    Filed: July 9, 2018
    Publication date: November 1, 2018
    Applicant: COMADUR S.A.
    Inventor: Damien CARTIER
  • Patent number: 10059629
    Abstract: A process for the production of a grey zirconia-based article wherein a first mixture includes a zirconia powder forming the base constituent, 4% to 15% by weight of at least one stabilizer selected from among the group of oxides including yttrium oxide, magnesium oxide and calcium oxide alone or in combination, 0.1% to 1% by weight of a vanadium oxide powder (V2O5), 0.1% to 1% by weight of a chromium oxide powder (Cr2O3) and 0.1% to 1% by weight of a silicon oxide powder (SiO2); making a second mixture including the first mixture and a binder; making a granulated mixture by conducting a granulation of the second mixture; forming a blank by giving this second granulated mixture the shape of the desired article; sintering the blank in air for at least thirty minutes at a temperature in the range of between 1250° and 1550° C.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: August 28, 2018
    Assignee: Comadur S.A.
    Inventors: Arnaud Actis-Datta, Damien Cartier
  • Patent number: 10047216
    Abstract: The invention also concerns a binder for an injection molding composition including: from 35 to 54% by volume of a polymeric base, from 40 to 55% by volume of a mixture of waxes, and approximately 10% by volume of a surfactant, wherein the polymeric base contains copolymers of ethylene and methacrylic or acrylic acid, or copolymers of ethylene and vinyl acetate, or copolymers of ethylene including maleic anhydride or a mixture of these copolymers, as well as polyethylene, polypropylene and acrylic resin.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: August 14, 2018
    Assignee: Comadur S.A.
    Inventor: Damien Cartier
  • Patent number: 9914195
    Abstract: A system of polishing a concave surface of an external piece for a timepiece, including a securing device including a support that carries the piece, and a grinding device including an abrasive mechanism rotatably mounted along a first axis and configured to polish the piece along a first curvature. The securing device further includes a moving mechanism of the support so that the support imparts a back-and-forth motion along a second axis and a contact surface of the abrasive mechanism is curved to polish the piece along a second curvature in addition to the first curvature. The system can be applied to the field of crystals for a timepiece.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: March 13, 2018
    Assignee: Comadur S.A.
    Inventors: Jean-Paul Tassetti, Gilles Derriey, Patrice Dumont
  • Patent number: 9908261
    Abstract: A mixer for ceramic feedstock pellets with a tank, a mixing shaft, and a heat exchanger including a cooler for the cooling of the content of this tank is provided. A controller controls the heat exchanger which includes a heater arranged to heat the content of this tank to a temperature comprised between a lower temperature (TINF) and a higher temperature (TSUP) stored in a memory for a specific mixture, and the heater exchanges energy with a heat exchange and mixing temperature maintenance circuit, external to this tank, and wherein the thermal inertia of this circuit is higher than that of this fully loaded tank. The invention also concerns a method for mixing raw material for powder metallurgy, implementing a specific injection molding composition and a specific binder.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: March 6, 2018
    Assignee: Comadur S.A.
    Inventor: Damien Cartier
  • Publication number: 20170203469
    Abstract: Mixer for ceramic feedstock pellets with a tank, a mixing means, and heat exchange means including cooling means for the cooling of the content of this tank. Control means control the heat exchange means which include heating means arranged to heat the content of this tank to a temperature comprised between a lower temperature (TINF) and a higher temperature (TSUP) stored in a memory for a specific mixture, and the heating means exchange energy with a heat exchange and mixing temperature maintenance circuit, external to this tank, and wherein the thermal inertia of this circuit is higher than that of this fully loaded tank. The invention also concerns a method for mixing raw material for powder metallurgy, implementing a specific injection moulding composition and a specific binder.
    Type: Application
    Filed: April 4, 2017
    Publication date: July 20, 2017
    Applicant: Comadur S.A.
    Inventor: Damien CARTIER
  • Patent number: 9676671
    Abstract: The invention concerns a method for fabricating an orange, zirconia-based article, characterized in that it includes the series of steps consisting in creating a first mixture comprising a zirconia powder, 3 to 20% by weight of at least one stabilizer chosen from the group of oxides comprising yttrium oxide, magnesium oxide, and calcium oxide, alone or in combination, 0.1% to 5% by weight of at least one element intended to form a vitreous phase, and chosen from the group comprising silicon oxide, aluminum oxide, lithium oxide and yttrium oxide, alone or in combination, 1% to 6% by weight of a cerium oxide powder; creating a second mixture including said first mixture and a binder; creating a granulated mixture by granulating said second mixture; forming a green body by giving said second granulated mixture the shape of the desired article; air sintering for at least thirty minutes at a temperature comprised between 1,250 and 1,500° C.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: June 13, 2017
    Assignee: Comadur S.A.
    Inventor: Arnaud Actis-Datta
  • Patent number: 9372474
    Abstract: An external piece for a time piece and a method of manufacturing the same, including a top surface and a bottom surface. At least one of the faces includes a longitudinal curvature and a transverse curvature that are different.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: June 21, 2016
    Assignee: Comadur S.A.
    Inventors: Jean-Paul Tassetti, Gilles Derriey, Patrice Dumont
  • Patent number: 9345292
    Abstract: The invention relates to an assembly system including first and second parts each including a blind recess and at least one third part including a through hole. According to the invention, the assembly system further includes a permanent securing device including a pin mounted in the through hole of the at least one third part, the pin including, at a first end, a first means of locking one of the first and second parts in its blind recess, and a socket whose external wall includes a second means of locking the other of the first and second parts in its blind recess, and whose internal wall is welded to the second end of the pin in order to join the first, second and at least one third parts to each other with no plastic deformation of the first and second parts.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: May 24, 2016
    Assignee: Comadur S.A.
    Inventors: Alain Geiser, Sylvain Boucard
  • Patent number: 9329575
    Abstract: The invention relates to a bearing comprising a sintered ceramic body traversed by a hole. According to the invention, the body includes a top surface and a bottom surface each of which includes a functional element communicating with said hole.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: May 3, 2016
    Assignee: Comadur S.A.
    Inventors: Bruno Besutti, Marie-Claire Barata, Christian Russi
  • Publication number: 20160115082
    Abstract: A process for the production of a grey zirconia-based article wherein a first mixture includes a zirconia powder forming the base constituent, 4% to 15% by weight of at least one stabiliser selected from among the group of oxides including yttrium oxide, magnesium oxide and calcium oxide alone or in combination, 0.1% to 1% by weight of a vanadium oxide powder (V2O5), 0.1% to 1% by weight of a chromium oxide powder (Cr2O3) and 0.1% to 1% by weight of a silicon oxide powder (SiO2); making a second mixture including the first mixture and a binder; making a granulated mixture by conducting a granulation of the second mixture; forming a blank by giving this second granulated mixture the shape of the desired article; sintering the blank in air for at least thirty minutes at a temperature in the range of between 1250° and 1550° C.
    Type: Application
    Filed: October 15, 2015
    Publication date: April 28, 2016
    Applicant: Comadur S.A.
    Inventors: Arnaud ACTIS-DATTA, Damien CARTIER
  • Publication number: 20160108216
    Abstract: The invention also concerns a binder for an injection moulding composition including: from 35 to 54% by volume of a polymeric base, from 40 to 55% by volume of a mixture of waxes, and approximately 10% by volume of a surfactant, wherein the polymeric base contains copolymers of ethylene and methacrylic or acrylic acid, or copolymers of ethylene and vinyl acetate, or copolymers of ethylene including maleic anhydride or a mixture of these copolymers, as well as polyethylene, polypropylene and acrylic resin.
    Type: Application
    Filed: May 23, 2014
    Publication date: April 21, 2016
    Applicant: COMADUR S.A.
    Inventor: Damien CARTIER
  • Patent number: 9248582
    Abstract: The invention relates to a method (1) for fabricating a matt ceramic part (13, 14, 15, 17, 19) comprising the following steps: a) fabricating (2) a ceramic part; b) sand blasting (7) portions of the ceramic part to make them matt; According to the invention, the method includes the following final step: c) lapping (9) the matt portions in order to level out the surface of the matt portions. The invention concerns the field of timepieces.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: February 2, 2016
    Assignee: Comadur S.A.
    Inventors: Sylvain Boucard, Jean-Mary Hawrylko
  • Patent number: 9227292
    Abstract: A system of finishing a part includes at least two materials of different hardness, the system including at least one accommodating device, used as a container for an abrasive element and a support device including a structure to secure the part. The system further includes a mechanism to move the part closer against the abrasive element and a mechanism to move the part relative to the accommodating device along satin finish lines. The part, in one example, is a part of a timepiece.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: January 5, 2016
    Assignee: Comadur S.A.
    Inventors: Jean-Mary Hawrylko, Hubert Gauthier
  • Patent number: 8956202
    Abstract: A system for machining a bevel on a disk shaped part including a grinding device having an abrasive, a device for securing the part including a support to which the part is fitted and which is integral with an axis of rotation. The securing device further includes a system for orienting the axis of rotation to define the angle of the bevel and a system for moving the support closer to the abrasive in order to machining the part under stress. The invention concerns the field of crystals for timepieces.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: February 17, 2015
    Assignee: Comadur S.A.
    Inventors: Jean-Paul Tassetti, Christophe Vuillemin, Fabien Bez
  • Publication number: 20140338398
    Abstract: The invention relates to an assembly system including first and second parts each including a blind recess and at least one third part including a through hole. According to the invention, the assembly system further includes a permanent securing device including a pin mounted in the through hole of the at least one third part, the pin including, at a first end, a first means of locking one of the first and second parts in its blind recess, and a socket whose external wall includes a second means of locking the other of the first and second parts in its blind recess, and whose internal wall is welded to the second end of the pin in order to join the first, second and at least one third parts to each other with no plastic deformation of the first and second parts.
    Type: Application
    Filed: April 21, 2014
    Publication date: November 20, 2014
    Applicant: Comadur S.A.
    Inventors: Alain GEISER, Sylvain Boucard
  • Publication number: 20140336034
    Abstract: Mixer for ceramic feedstock pellets with a tank, a mixing means, and heat exchange means including cooling means for the cooling of the content of this tank. Control means control the heat exchange means which include heating means arranged to heat the content of this tank to a temperature comprised between a lower temperature (TINF) and a higher temperature (TSUP) stored in a memory for a specific mixture, and the heating means exchange energy with a heat exchange and mixing temperature maintenance circuit, external to this tank, and wherein the thermal inertia of this circuit is higher than that of this fully loaded tank. The invention also concerns a method for mixing raw material for powder metallurgy, implementing a specific injection moulding composition and a specific binder.
    Type: Application
    Filed: May 2, 2014
    Publication date: November 13, 2014
    Applicant: Comadur S.A.
    Inventor: Damien CARTIER
  • Patent number: 8864369
    Abstract: The invention relates to a member (1) comprising a ceramic element (3) intended to be fitted against a body (5). According to the invention, the member includes a cooperation device (7) comprising a deformable insert (2) for locking the fit between the ceramic element (3) and the body (5), and a means of adherence (13) between the insert (2) and the ceramic element (3), in order to decrease the relative movement between said ceramic element (3) and said insert (2). The invention concerns the field of external elements for timepieces.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: October 21, 2014
    Assignee: Comadur S.A.
    Inventor: Alexandre Netuschill