Abstract: A motor vehicle door includes an arrester device having a magneto-rheological fluid for holding the motor vehicle door in position, and a coil for solidifying the magneto-rheological fluid that is disposed adjacent to a liquid-tight interior space, with the interior space containing one or more components which can be moved relative to other components in the interior space. A relative movement between these components is slowed down by solidifying the magneto-rheological fluid and the slowing down of the relative movement causes the motor vehicle door to be held in position. The coil is part of a switchable hard magnet which is selected such that a sedimentation-stable, magneto-rheological fluid is obtained. The motor vehicle door may thus be reliably held in a freely selectable position.

Abstract: A dielectric elastomer has a film that contains a fluorinated silicone elastomer and has two faces. A coating of a stretchable electrode material is applied to each one of the two faces. The fluorinated silicone elastomer has a modulus of elasticity of maximally 450 kPa. The fluorinated silicone elastomer is a three-dimensionally crosslinked, fluorinated, alkyl group-containing polysiloxane in combination with a fluorinated silicone oil. Alternatively, or in addition, the fluorinated silicone elastomer is a three-dimensional wide-mesh crosslinked, fluorinated, alkyl-group containing polysiloxane whose wide mesh property has been effected by a chain length extension by addition of a chain-shaped silicone molecule containing two Si—H groups to an alkenyl group-containing polysiloxane molecule.

Abstract: A forming method includes using at least one forming tool to form a material of a workpiece and using a lubricant between the, material and the at least one forming tool. The lubricant has a viscosity that is modifiable by applying or varying a field.

Abstract: A forming method includes using at least one forming tool to form a material of a workpiece and using a lubricant between the material and the at least one forming tool. The lubricant has a viscosity that is modifiable by applying or varying a field.

Abstract: The present invention relates to a stable sediment dispersion which can be used above all as electrorheological (ERF) and/or magnetorheological fluid (MRF), a method for production thereof and also use thereof.

Abstract: The present invention discloses a magnetorheological force transmission device which comprises at least two solid body parts adapted to be moved in a substantially translational manner against each other, and an MRF gap, which is at least partially fillable and/or filled with a magnetorheological material 2MRF, the MRF gap being arranged at least partially inside one of or both of the two parts and/or being arranged at least partially in-between the two parts, and which is characterized in that the magnetic circuit system of the magnetorheological force transmission device being designed and/or disposed to generate a magnetic flux within at least part of the MRF gap comprises at least one electromagnet, at least one permanent magnet and at least one magnetic-field-balancing insert and/or magnetic isolator.

Abstract: The present invention relates to a magnetorheological torque transmission device comprising two device parts separated by at least one transmission gap for transmitting torque, said gap being fillable and/or filled with a magnetorheological material, rotating relative to each other about an axis of rotation, wherein the magnetic circuit system of the torque transmission device comprises at least one permanent magnet having variable magnetization in addition to at least one electromagnet for generating the magnetic flux in at least one part of the transmission gap, wherein the electromagnet and the permanent magnet are designed and disposed such that the magnetization of the permanent magnet can be adjusted by changing the coil current of the electromagnet. The present invention further relates to a correspondingly designed force transmission device.

Abstract: The invention relates to composites made of an elastic carrier medium comprising polynorbornene (PNR) and magnetisable particles which are polarized reversibly in a magnetic field. Thus the mechanical properties, such as e.g. storage modulus G? (describes the elastic behavior or the energy storage) and loss modulus G? (describes the viscous behavior or the energy dissipation), of such elastomer composites can be increased rapidly and reversibly within wide limits (up to approx. two orders of magnitude) as a function of an external magnetic field. Wide-ranging application possibilities are produced herefrom, e.g. for adaptive damping systems, in which the damping force can be adjusted via the strength of the magnetic field.

Abstract: A forming method includes using at least one forming tool to form a material of a workpiece and using a lubricant between the material and the at least one forming tool. The lubricant has a viscosity that is modifiable by applying or varying a field.

Abstract: The invention relates to magnetorheological materials comprising at least one non-magnetisable carrier medium and magnetisable particles contained therein, at least two magnetisable particles fractions being contained as particles and these being formed from non-spherical particles and from spherical particles.

Abstract: The present invention relates to composites comprising an elastic and/or thermoplastic-elastic carrier medium and hard magnetic particles which are polarised in a magnetic field, a magnetisation remaining after switching off the magnetic field.

Abstract: Present invention relates to a device for reducing vibrations of a vibrating object as well as a method for reducing vibrations, wherein the perturbing vibrations are reduced drastically by induction of counter-forces. In general, vibrations of equal frequency (counter-vibration) as the perturbing vibration are generated. The force generated by the counter-vibration acts onto the vibrating object, whose amplitude of vibration is to be reduced. The phasing of the counter-vibration is antipodal to the vibration to be reduced, preferably the force of the generated counter-vibration is greater than the force being necessary for compensation of the perturbing vibration. The transfer of the force of the counter-vibration onto the vibrating object is affected by means of a magnetorheological or electrorheological material, whereby the absolute value of the transmitted force is adjusted by the magnitude of an applied magnetical or electric field.

Abstract: The present invention relates to a damping device having a first control element with a first surface (O1) and a second control element with a second surface (O2), the two control elements being moveable relative to each other with their two surfaces, a spatial region (intermediate space Z) which is filled at least partially with a magnetorheological and/or electrorheological material (M) and is disposed between the first and the second surface, and a field producer (4) with which a magnetic and/or electrical field can be produced in at least a partial region of the material-filled part of the intermediate space, and also a housing (1) which has two chambers (K1, K2) and in which a piston unit (2) which is moveable relative to the housing and a closing unit (3) which is moveable relative to the piston unit are disposed, the piston unit and the closing unit forming a throughflow opening (D) connecting the two chambers, through which a fluid (F) can be displaced between the two chambers by means of a relative m

Abstract: The present invention discloses a locking device having a control unit with a first control element with a first surface (O1) and a second control element with a second surface (O2), the two control elements being moveable relative to each other with their two surfaces, a spatial region (intermediate space Z) which is filled at least partially with a magnetorheological and/or electrorheological material (M) and is disposed between the first and the second surface, and a field producer (4) with which a magnetic and/or electrical field can be produced in at least a partial region of the material-filled part of the intermediate space, a locking unit with a piston unit (2) and a locking system (3) with which the piston unit can be locked, the two control elements being able to be coupled to each other by the field produced in the intermediate space and the locking state of locking system and piston unit being able to be changed by means of this coupling.

Abstract: The invention relates to magnetorheological materials comprising at least one non-magnetisable carrier medium and magnetisable particles contained therein, in addition a combination of magnetic and non-magnetic inorganic materials and/or composite particles thereof being contained.

Abstract: The present invention relates to magnetorheological elastomers comprising at least one non-magnetizable elastomeric carrier medium and magnetizable particles contained therein and also to the use thereof. In the case of MREs of this type, the mechanical properties, such as the rigidity modulus, can be changed reversibly by an applied magnetic field.

Abstract: The present invention relates to a stable sediment dispersion which can be used above all as electrorheological (ERF) and/or magnetorheological fluid (MRF), a method for production thereof and also use thereof.

Abstract: The invention relates to composites made of an elastic carrier medium comprising polynorbornene (PNR) and magnetisable particles which are polarised reversibly in a magnetic field. Thus the mechanical properties, such as e.g. storage modulus G? (describes the elastic behaviour or the energy storage) and loss modulus G? (describes the viscous behaviour or the energy dissipation), of such elastomer composites can be increased rapidly and reversibly within wide limits (up to approx. two orders of magnitude) as a function of an external magnetic field. Wide-ranging application possibilities are produced herefrom, e.g. for adaptive damping systems, in which the damping force can be adjusted via the strength of the magnetic field.

Abstract: The present invention discloses a magnetorheological force transmission device which comprises at least two solid body parts 1a, 1b adapted to be moved in a substantially translational manner against each other, and an MRF gap 2, which is at least partially fillable and/or filled with a magnetorheological material 2MRF, the MRF gap 2 being arranged at least partially inside one of or both of the two parts and/or being arranged at least partially in-between the two parts, and which is characterized in that the magnetic circuit system of the magnetorheological force transmission device being designed and/or disposed to generate a magnetic flux within at least part of the MRF gap comprises at least one electromagnet 3, at least one permanent magnet 4 and at least one magnetic-field-balancing insert 5, 5a, 5b and/or magnetic isolator 7, 7a, 7b.

Abstract: Magnetorheological elastomer composites comprising at least one thermoplastic elastomer which forms a thermoplastic matrix and magnetisable particles which are contained therein, the elastomer matrix containing at least 10% by weight of plasticiser, relative to the thermoplastic elastomer.