A microelectromechanical membrane transducer includes: a supporting structure; a cavity formed in the supporting structure; a membrane coupled to the supporting structure so as to cover the cavity on one side; a cantilever damper, which is fixed to the supporting structure around the perimeter of the membrane and extends towards the inside of the membrane at a distance from the membrane; and a damper piezoelectric actuator set on the cantilever damper and configured so as to bend the cantilever damper towards the membrane in response to an electrical actuation signal.

A damper unit for use in a vibration-reducing assembly for a steering wheel is disclosed. An elastomeric damper element is molded on an inner sleeve and includes a plurality of elastomeric ribs forming a radially outer engagement surface, and a plurality of elastomeric support studs, which are mutually spaced in a circumferential direction are flexible in all directions transverse to said axis. Methods for making a damper unit and a damper assembly are also disclosed.

Gas spring assemblies include a flexible spring member and a restraining cylinder. The flexible spring member includes a flexible wall extending longitudinally between first and second ends as well as peripherally about a longitudinal axis. The flexible wall includes an inside surface and an outside surface with the inside surface at least partially defining a spring chamber. The restraining cylinder includes a cylinder wall that extends longitudinally between first and second open ends as well as peripherally about the longitudinal axis. The cylinder wall includes an inside surface and an outside surface. The restraining cylinder is disposed longitudinally along the flexible spring member between the first and second ends thereof with at least a portion of the inside surface of the restraining cylinder permanently attached to the flexible wall along the outside surface thereof by way of a chemically-bonded joint. Methods of assembly are also included.

A shock absorber having a metal damper tube and base assembly is provided. The base assembly, which includes a composite mounting attachment made of a composite material, such as a recyclable thermoplastic, is fixed to an external surface of the metal damper tube, which may be a finished product. A cavity in the composite mounting attachment houses at least a portion of the metal damper tube and thus defines an overlapping region where the composite mounting attachment and the metal damper tube are co-extensive with each other. One or more windows are provided in the overlapping region of the composite mounting attachment where the metal damper tube is left exposed. This helps to promote heat dissipation away from the metal damper tube while reducing weight and heat transmission from the metal damper tube to the composite mounting attachment to reduce overheating of the composite material.

A rotor assembly has a drive shaft and a bladed rotor mounted to the drive shaft for rotation therewith. A dampening material is bonded to the rotor at a location where there is torsional strain energy present. Shear forces in the damping material are used to convert the torsional strain energy into heat energy, thereby providing torsional vibration damping.

A support for household appliance includes a hydraulic plate which is fixed to the bottom of the household appliance; a sheath, which is fixedly connected with the hydraulic plate; a regulating support, which is arranged in the sheath and is axially movable relative to the sheath; an accommodation chamber, which is formed by the hydraulic plate, the sheath and the regulating support; and a flexible accommodation body, which accommodates a liquid medium and is arranged in the accommodation chamber. The flexible accommodation body extends and retracts to drive the regulating support to axially move in the sheath for leveling under the action of pressure. The hydraulic plate and the sheath can be rapidly, reliably and fixedly connected, the requirements on the strength of connection between the hydraulic plate and the sheath are lowered, and the essential space and height required by the connection are further lowered.

A drive arrangement having an internal combustion engine, a transmission device with a power input and a power output, having an electric motor or converter which comprises a rotor, for the output of a drive torque to the power input of the transmission device is provided. An absorber arrangement is provided for rotation about a central axis for the reduction of the degree of irregularity of the rotational drive movement of the internal combustion engine, which rotational drive movement is introduced into the transmission device at the power input thereof. The absorber arrangement comprises a first carrier part, a second carrier part, a plurality of absorber masses which follow one another in the circumferential direction, and a coupling mechanism, for the movement of the absorber masses in a radial plane with respect to the central axis in accordance with a relative rotation of the carrier parts with respect to one another.

A damping valve includes a damping valve body with at least one through-channel, the outlet cross section of which is at least partially covered by at least one valve disk. The at least one valve disk is preloaded by at least two star springs. Each star spring has a support ring and a quantity of radial spring arms. The support rings lie one on top of the other in the installed position. The star springs are layered in opposite orientation such that the spring arms of at least two adjacent star springs face in the same direction with respect to the valve disk, and this star spring package has an anti-rotation element in an assembled position.

A spring unit containing a spring system used in bed, armchair and sofa like constructions and realizing different hardness and comfort levels in different areas of the constructions and having a soft spring forming a soft comfort area of low hardness of the spring unit, a medium hard spring providing gradual transition between soft comfort areas of the spring unit and hard comfort areas with a spring a having number of convolution different from the soft spring and of the same wire diameter, and a hard spring providing hard comfort area of the spring unit by a spring having number of convolution different from the soft spring and medium hard spring and of the same wire diameter as the medium hard spring and soft spring.

A rotor assembly has a drive shaft and a bladed rotor mounted to the drive shaft for rotation therewith. A dampening material is bonded to the rotor at a location where there is torsional strain energy present. Shear forces in the damping material are used to convert the torsional strain energy into heat energy, thereby providing torsional vibration damping.