Abstract:
A vibration module for applying vibrational tractions to a wearer's skin is presented. Use of the vibration module in headphones is illustrated for providing tactile sensations of low frequency for music, for massage, and for electrical recording and stimulation of the wearer. Damped, planar, electromagnetically actuated vibration modules of the moving magnet type are presented in theory and reduced to practice, and shown to provide a substantially uniform frequency response over the range 40—200 Hz with a minimum of unwanted audio.
Abstract:
Die vorliegende Erfindung betrifft eine Rohrfeder (1), insbesondere als Schraubenfeder (3), Drehstabfeder (2) und/oder Stabilisator (4) für Kraftfahrzeuge, umfassend mindestens ein Metallrohrelement (5) mit einem Rohrinnenquerschnitt (6), einem Rohrinnendurchmesser (DI), einem Rohraußendurchmesser (DA), einer Rohrinnenwandung (7) und einer Rohrwanddicke (W), wobei in dem Rohrinnenquerschnitt (6) des mindestens einen Metallrohrelements (5) der Rohrfeder (1) wenigstens in einem Teilbereich mindestens ein Metallschaum (8) angeordnet ist und das mindestens eine Metallrohrelement (5) ein wenigstens teilweise martensitisches Gefüge aufweist.
Abstract:
Rundlager enthaltend (i) Aussenbuchse, (ii) zylindrisches Lagerelement auf der Basis von zelligen Polyisocyanat-Polyadditionsprodukten und (iii) hohle Innenbuchse, wobei die zwischen der Aussenbuchse (i) und der Innenbuchse (iii) befindliche Stirnseite des Lagerelementes (ii) mit einem kompakten Polyisocyanat-Polyadditionsprodukt versiegelt ist.
Abstract:
Impact absorbing device and method of producing an impact absorbing device The present invention concerns an impact absorbing device. The impact absorbing device comprises one or more closed cell structures. Each closed cell structure is substantially hollow, and each closed cell structure comprises a plurality of layers of a first material. Each of the plurality of layers of material is fused to an adjacent layer of material. The plurality of layers may be created by a fused deposition modelling technique. The closed cell structures may surround a second, different, material.
Abstract:
A mechanically isolating mounting for use with a level sensing gauge (12) comprises damping material (22a, 22b) positioned exterior to the metal primary housing and between a primary housing of the gauge and a gauge mounting (13, 20, 20a), such that the damping material isolates the gauge mechanically from vibration and shock delivered through the gauge mounting. The gauge housing may comprise a mounting plate (13) or a metal enclosure (20, 20a) surrounding the primary housing and forming an outer housing.
Abstract:
Metamaterial composed of a plurality of elastic elements (3), rigid elements (1; 2), and hinges (4), wherein the hinges (4) of the single cells of the metamaterial allow the rotation of some elements with respect to others and the axial elongation or the axial compression of the elastic elements (3), without bending stress in any rigid element, except at most in the zone directly defined by the hinges (4). In general, the elastic elements and the rigid elements are made of different materials, optimal for the different functions that the respective elements must perform. The absence of plastic deformations in the elements of the metamaterial ensures the reversibility and the quick recovery of the initial shape of the metamaterial after an external stimulus. The metamaterial has a plurality of stable states of the potential energy (or internal energy) which can be suitably designed in order to facilitate and speed up the return of the metamaterial into the original condition after the action of an external force. The metamaterial can be suitably preloaded in order to act as energy absorber, as an actuator or as a vibration isolator. In the case of an energy absorber, for example, the preload is adjustable based on the impact energy that is intended to be absorbed.
Abstract:
Disclosed herein are flexible energy absorbing systems and methods of manufacturing flexible energy absorbing systems. The systems include one or more cells of a strain rate sensitive material and having a re-entrant geometry. Some of the systems have an anisotropic geometry to provide a different response to impacts from different directions.
Abstract:
A machine includes a section that defines a target vibrational mode to dampen and a nanocellular foam damper that includes interconnected ligaments in a cellular structure. The interconnected ligaments have an average ligament size defined with respect to a vibrational loss modulus of the nanocellular foam damper and the target vibrational mode. Also disclosed is a method of damping vibration.