Patents by Inventor Chokri Cherif

Chokri Cherif has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20230079829
    Abstract: The present invention provides a winding and twisting device for a ring spinning or ring twisting machine, comprising: a stator comprising a superconducting material, a stator cooling device, a rotor configured to generate a magnetic field, and a rotatable spindle, wherein the rotor and the stator are arranged co-axially to the spindle, and wherein the rotor has a ring/traveler system mounted thereon.
    Type: Application
    Filed: February 18, 2021
    Publication date: March 16, 2023
    Inventors: Anwar ABDKADER, Mahmud HOSSAIN, Martin WALDMANN, Chokri CHERIF
  • Patent number: 9572668
    Abstract: The invention relates to an implant and a set for producing an implant and their uses. Furthermore, the invention describes a method of making an implant as per the invention. An implant for producing bone implants with improved mechanical characteristics, especially with adjustable mechanical characteristics, is provided via the invention. The implant as per the invention made up of a fiber composite material contains resorbable mineral bone cement as the matrix material, to which reinforcing, long metal fibers and/or endless metallic fibers with an aspect ratio of at least 100:1 are added in the form of at least one fiber structure that provides a framework and that preforms the contour of the implant.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: February 21, 2017
    Assignee: Innotere GmbH
    Inventors: Berthold Nies, Sophie Rössler, Sandra Storch, Chokri Cherif, Ezzeddine Laourine
  • Patent number: 9562306
    Abstract: A fabric structure (1) having a cellular construction. The fabric structure comprises at least one base layer (6) consisting of warp threads (10), at least one top layer (7) consisting of warp threads (11) and weft threads (2) placed in between, wherein the fabric structure (1) is formed by a multiplicity of three-dimensional cells (3, 9) and the height (8) of each individual cell (3, 9) is defined by the spacing (8) between two warp threads (10, 11), located above the other in height direction z, in adjacent layers (6, 7), the length (12) of the cell (3, 9) is defined by the spacing (12) between two warp threads (10) or (11) adjacent in the weft direction x, in one layer (6, 7) and the width (13, 14) of a cell (3, 9) is defined by the extent (13) of the weft thread course in the warp direction y and/or the spacing (14) between the two weft threads (2) that are opposite in the warp direction y and adjacent to the particular cell (9).
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: February 7, 2017
    Assignee: TECHNISCHE UNIVERSITÄT DRESDEN
    Inventors: Cornelia Sennewald, Gerald Hoffmann, Chokri Cherif
  • Publication number: 20150368835
    Abstract: The invention relates to a fabric structure having a cellular construction including at least one base layer of warp threads, at least one top layer of warp threads and weft threads placed in between, and formed by a multiplicity of three-dimensional cells having a height, length and width dimension Each weft thread extends at least regionally in the fabric structure in a dimensionally stable and three-dimensional manner and winds in the weft direction x about this axis an imaginary, three-dimensional elongate hollow body, extending through the cells, having any desired end face. The weft threads intersect the warp threads such that the weft threads and warp threads retain one another and the fabric structure is self-supporting.
    Type: Application
    Filed: February 6, 2014
    Publication date: December 24, 2015
    Inventors: Cornelia SENNEWALD, Gerald HOFFMANN, Chokri CHERIF
  • Publication number: 20150066144
    Abstract: The invention relates to an implant and a set for producing an implant and their uses. Furthermore, the invention describes a method of making an implant as per the invention. An implant for producing bone implants with improved mechanical characteristics, especially with adjustable mechanical characteristics, is provided via the invention. The implant as per the invention made up of a fiber composite material contains resorbable mineral bone cement as the matrix material, to which reinforcing, long metal fibers and/or endless metallic fibers with an aspect ratio of at least 100:1 are added in the form of at least one fiber structure that provides a framework and that preforms the contour of the implant.
    Type: Application
    Filed: April 11, 2013
    Publication date: March 5, 2015
    Inventors: Berthold Nies, Sophie Rössler, Sandra Storch, Chokri Cherif, Ezzeddine Laourine
  • Patent number: 8813467
    Abstract: A tire includes at least one structural element which includes at least one reinforcing element which includes at least one hybrid yarn, the at least one hybrid yarn including a plurality of filaments obtained from at least one first multifilament yarn having a first initial tangent modulus and at least one second multifilament yarn having a second initial tangent modulus, the first and the second initial tangent modulus being different from each other, each one of the first and the second multifilament yarn including a plurality of individual filaments, the individual filaments of each one of the first and the second multifilament yarns being at least partially intermixed with each other. The tire may be a high performance or ultra high performance tire, or a tire suitable for being employed in sporting contests such as track motor races, or a tire suitable for sports utility vehicles.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: August 26, 2014
    Assignee: Pirelli Tyre, S.p.A.
    Inventors: Barbara Rampana, Diego Tirelli, Udo Kuhlmann, Chokri Cherif, Christian Paul, Refah Ahmet Torun, Olaf Diestel
  • Patent number: 8640753
    Abstract: A tire includes at least one structural element which includes at least one reinforcing element, which includes at least one hybrid yarn, the at least one hybrid yarn including a plurality of filaments obtained from at least one first multifilament yarn having a first initial tangent modulus and at least one second multifilament yarn having a second initial tangent modulus, the first and the second initial tangent modulus being different from each other, each one of the first and the second multifilament yarns including a plurality of individual filaments, the individual filaments of each one of the first and the second multifilament yarns being at least partially intermixed with each other. Preferably, the tire is a high performance or ultra high performance tire, or a tire suitable for being employed in sporting contests, such as, track motor races, or a tire suitable for sports utility vehicles.
    Type: Grant
    Filed: October 24, 2007
    Date of Patent: February 4, 2014
    Assignee: Pirelli Tyre S.p.A.
    Inventors: Barbara Rampana, Diego Tirelli, Udo Kuhlmann, Chokri Cherif, Christian Paul, Refah Ahmet Torun, Olaf Diestel
  • Publication number: 20130042593
    Abstract: A tire includes at least one structural element which includes at least one reinforcing element which includes at least one hybrid yarn, the at least one hybrid yarn including a plurality of filaments obtained from at least one first multifilament yarn having a first initial tangent modulus and at least one second multifilament yarn having a second initial tangent modulus, the first and the second initial tangent modulus being different from each other, each one of the first and the second multifilament yarn including a plurality of individual filaments, the individual filaments of each one of the first and the second multifilament yarns being at least partially intermixed with each other. The tire may be a high performance or ultra high performance tire, or a tire suitable for being employed in sporting contests such as track motor races, or a tire suitable for sports utility vehicles.
    Type: Application
    Filed: October 19, 2012
    Publication date: February 21, 2013
    Inventors: Barbara RAMPANA, Diego TIRELLI, Udo KUHLMANN, Chokri CHERIF, Christian PAUL, Refah Ahmet TORUN, Olaf DIESTEL
  • Publication number: 20100224298
    Abstract: A tire includes at least one structural element which includes at least one reinforcing element which includes at least one hybrid yarn, the at least one hybrid yarn including a plurality of filaments obtained from at least one first multifilament yarn having a first initial tangent modulus and at least one second multifilament yarn having a second initial tangent modulus, the first and the second initial tangent modulus being different from each other, each one of the first and the second multifilament yarn including a plurality of individual filaments, the individual filaments of each one of the first and the second multifilament yarns being at least partially intermixed with each other. Preferably, the tire is a high performance or ultra high performance tire, or a tire suitable for being employed in sporting contests such as track motor races, or a tire suitable for sports utility vehicles.
    Type: Application
    Filed: October 24, 2007
    Publication date: September 9, 2010
    Applicant: PIRELLI TYRE S.PA.
    Inventors: Barbara Rampana, Diego Tirelli, Udo Kuhlmann, Chokri Cherif, Christian Paul, Refah Ahmet Torun, Olaf Diestel
  • Patent number: 7123024
    Abstract: A device is disclosed, comprising a microwave resonator, for or on a spinner preparation machine with drawing gear (2) for drawing fiber material (FB), in particular a carding, drawing or combing machine, whereby the resonator (30) is embodied for connection to a measuring device (16) for measuring the strip density (mass per unit length) or the strip thickness and/or the dampness of the fiber material (FB), continuously passing through the resonator chamber (31). Said device is characterized in that the resonator (30) is integrated in a functional group (20; 120; 220; 320; 420) of the spinner preparation machine which is typical for the machine. A spinner preparation machine, in particular a carding, drawing or combing machine, is further disclosed which comprises a corresponding device.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: October 17, 2006
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventors: Wolfgang Göhler, Chokri Cherif
  • Publication number: 20060207238
    Abstract: Proposed is a spinning method for the direct spinning of sliver (FB?) by means of a ring spinning machine (200), whereby one or more slivers (FB?), which said slivers were previously produced in a carding (100) or a combing machine, were drafted in a first draft system (4) situated upstream of the said ring spinning machine (200) to produce a single sliver (FB?), which, without the interposition of a flyer was made available to the ring spinning machine (200), in which the said single sliver (FB?), by means of a second draft system (204) is drawn and formed into a yarn (G). The invented method characterizes itself in that the sliver (FB?), at the output of the first draft system (4) has a band weight less than 2.5 ktex and is provided with a protective winding, and in that this sliver (FB?) in the second draft system (204) is subjected to a draft of more than 30. Likewise, an apparatus to carry out this method is also proposed.
    Type: Application
    Filed: March 1, 2006
    Publication date: September 21, 2006
    Inventor: Chokri Cherif
  • Patent number: 7103440
    Abstract: The invention uses microwaves in the spinning industry in order to determine the band mass of an elongated, substantially non-twisted fiber structure. In addition, a method for measuring the sliver mass from the frequency detuning and the damping of resonance signals of a microwave sensor while taking into consideration the moisture of the fiber structure with a computer is suggested. Likewise, a corresponding spinning preparation machine and a laboratory device for measuring the sliver mass are part of the invention. Lastly, a method and a spinning preparation machine for recognizing foreign matter in a moved fiber structure with the aid of microwaves is suggested.
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: September 5, 2006
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventors: Joachim Dämmig, Chokri Cherif
  • Publication number: 20060168764
    Abstract: A method is suggested for operating a spinning-mill preparing machine (1) with a control apparatus (20), especially a draw frame, card or combing machine, in which a running fiber structure (FV) is conducted through a measuring area (26, 26?,33) of a measuring apparatus (25, 25?, 32) and a measuring signal (S(t); Sa(t), Se(t)) is generated that represents the length-specific mass (M) of the fiber structure (FV) located in the measuring area (26, 26?,33), in which a corrected measuring signal (SK(t); SKa(t), SKe(t)) is generated in that a correction value (K0, K1, K2; Ka, Ke) is added to the measuring signal (S(t); Sa(t), Se(t)), and in which the determination of the correction value (K0, K1, K2; Ka, Ke) takes place by the following steps controlled by the control apparatus (20) of the spinning-mill preparing machine (1): The fiber structure (FV) is removed from the measuring area (26, 26?,33) by pneumatic and/or mechanical means (27, 13,14; 28), Then, an empty measuring is performed, and The correction va
    Type: Application
    Filed: January 13, 2006
    Publication date: August 3, 2006
    Inventor: Chokri Cherif
  • Publication number: 20060143872
    Abstract: The present invention concerns a spinning preparatory machine (1) with a drafting assembly (4) encompassing multiple roll pairs (5, 6, 7) by which a fiber band (FB?) can be drafted. The roll pairs (5, 6, 7) possess upper rolls (5a, 6a, 7a) and under rolls (5b, 6b, 7b). The roll pairs (5, 6, 7) are installed in a housing (15), wherein the roll pairs are protected from ambient atmospheric conditions about the preparatory machine (1) and from components thereof. A temperature controller (20) functions with the housing (15) to bring about internally a desired operational temperature, which is independent of temperature external to the housing (15).
    Type: Application
    Filed: October 26, 2005
    Publication date: July 6, 2006
    Inventor: Chokri Cherif
  • Publication number: 20060137145
    Abstract: A spinning preparation machine includes a drafting device for drafting at least one fiber sliver. The machine includes a microwave sliver thickness sensor through which the fiber sliver is guided, the sensor disposed at the inlet or outlet, or both, of the drafting device and includes at least one cavity resonator defined by a resonator wall. A device or system is incorporated with the sensor for minimizing temperature-conditioned deformations of the resonator during measurement of sliver thickness.
    Type: Application
    Filed: October 15, 2003
    Publication date: June 29, 2006
    Inventors: Otmar Kovacs, Chokri Cherif
  • Publication number: 20060130283
    Abstract: A device with a drafting device (3) for drafting at least one sliver (FB) supplied to the drafting device (3) comprises a sliver depositing apparatus (4) downstream from the drafting device (3) for depositing the drafted sliver (FB?) into a can (6). Furthermore, the device comprises a can replacement device (15) for replacing a filled can (6?) by a can (6) to be filled. Means (17) is provided on the device for lowering the temperature (T) and/or the relative moisture (LF) of the fibrous material (FB, FB?) before or after it is deposited in the can (6). Furthermore, means (17) for raising the temperature TU of the machine parts (13, 20) that make contact with the uppermost sliver layers (BL) in the filled can (6?) can be provided, with which means (17) a condensation of water on the cited machine parts (13, 20) is at least reduced.
    Type: Application
    Filed: November 8, 2005
    Publication date: June 22, 2006
    Inventors: Michael Strobel, Helmut Mattis, Chokri Cherif, Peter Schulz
  • Publication number: 20060071670
    Abstract: A device is disclosed, comprising a microwave resonator, for or on a spinner preparation machine with drawing gear (2) for drawing fibre material (FB), in particular a carding, drawing or combing machine, whereby the resonator (30) is embodied for connection to a measuring device (16) for measuring the strip density (mass per unit length) or the strip thickness and/or the dampness of the fibre material (FB), continuously passing through the resonator chamber (31). Said device is characterized in that the resonator (30) is integrated in a functional group (20; 120; 220; 320; 420) of the spinner preparation machine which is typical for the machine. A spinner preparation machine, in particular a carding, drawing or combing machine, is further disclosed which comprises a corresponding device.
    Type: Application
    Filed: February 13, 2004
    Publication date: April 6, 2006
    Inventors: Wolfgang Gohler, Chokri Cherif
  • Publication number: 20060021197
    Abstract: A revolving plate for a sliver depositing device of a sliver-producing or sliver-processing spinning preparation machine is suggested that is designed for depositing sliver supplied in a running manner into a container (10), which revolving plate (1) has a press surface (7) arranged vertically to its axis of rotation (11) for pressing the deposited sliver into the container (10) and has a sliver passage (2) with a helical spatial curve , whereas the entrance opening (5) of the sliver passage (2) is arranged in such a manner that the supplied sliver enters into the sliver passage (2) parallel to the axis of rotation (11) of the revolving plate (1) and without bends, and whereas the exit opening (6) of the sliver passage (2) is in the plane of the press surface (7).
    Type: Application
    Filed: July 15, 2005
    Publication date: February 2, 2006
    Inventors: Michael Strobel, Chokri Cherif, Gerhard Schwaiger
  • Patent number: 6983516
    Abstract: Different improvements of a spinning preparation machine are proposed to measure the fiber sliver thickness or the fiber sliver cross-section of at least one fiber sliver by means of one or several microwave sensors. One improvement is characterized by compressing means and special mechanical guiding elements that can be installed before, after and/or in the microwave sensor. It is also proposed to install a pair of conveyor rollers after a microwave sensor that can be designed in particular as an input roller pair of the subsequent drafting equipment. Furthermore, proposals are made for the calibration of the (at least one) microwave sensor.
    Type: Grant
    Filed: April 3, 2003
    Date of Patent: January 10, 2006
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventors: Joachim Dämmig, Michael Ueding, Chokri Cherif
  • Publication number: 20050198784
    Abstract: Proposed is a procedure and an apparatus for the drafting of at least one fiber band by means of a controlled preparatory drafting operation for a spinning machine, in particular a carding or a drafting frame, which possesses successively arranged roll-pairs (5, 6, 7) for corrective drafting, whereby the cross-section or the bulk, or the thickness of the at least one fiber band, or drafting from standard measurements is measured upstream of a roll-pair (5, 6, 7) and, based upon the corresponding measurement signals, the speed of rotation of at least one roll (5a) of a first roll-pair (5) is controlled by a first control circuit (30) and the rotational speed of at least one roll (6a) of a second roll-pair (6) is controlled by a second control circuit (35; 40).
    Type: Application
    Filed: February 11, 2005
    Publication date: September 15, 2005
    Inventor: Chokri Cherif