70 results about "Rotational oscillation" patented technology

The head of a powered toothbrush includes a first tuft block mounted for rotational oscillation about an axis generally perpendicular to the outer surface of the head, and a second tuft block having fixed bristles or bristles independently movable by being mounted on an elastomeric base. The second tuft block oscillates perpendicular to a longitudinal axis of the head and in an in and out direction perpendicular to the outer surface of the head. A third stationary block may also be mounted on the head of the powered toothbrush. The bristles on the first, second, and third tuft blocks may be of various lengths, colors and stiffness, and may be mounted perpendicularly to or at an angle to the outer surface of the head.

The present invention relates to a micromechanical Coriolis rate-of-rotation sensor for detecting a rate of rotation about a measurement axis which is denoted the X axis below, having a substrate, an oscillation structure and means for generating a rotational oscillation about an excitation axis (Z axis) which is orthogonal to the measurement axis, wherein the oscillation structure is rotatably connected to the substrate by means of first, inner suspension means or by means of a central suspension means, with the result that it can carry out rotational oscillations about a fulcrum relative to the substrate, wherein at least one pair of second suspension means also connects the oscillation structure to the substrate and is arranged on opposite sides of the fulcrum, wherein the at least one pair of second suspension means is arranged at a greater radial distance from the fulcrum than the first, inner suspension means or the central suspension means in order to provide a micromechanical Coriolis rate-of-rotation sensor with a response behaviour which can be designed in a manner specific to the axis of rotation and with sufficient sensitivity to rates of rotation in one or more directions of rotation, which sensor simultaneously has sufficient robustness with respect to the effect of external shock or vibration in the measuring direction or directions (about a detection axis) in order to meet the requirements for electronic signal processing as far as possible and, in particular, to counteract the risk of the oscillation structure sticking on the substrate.

A micromechanical rate-of-rotation sensor for detecting a rate of rotation about a sense axis includes a substrate, a detection unit, means for generating a rotational oscillation of the detection unit about a drive axis which is orthogonal to the sense axis, and a central suspension means rotatably coupling the detection unit to the substrate in a fulcrum of the detection unit. The central suspension means is configured to permit the detection unit to perform a detection movement about a detection axis orthogonal to the sense axis in the form of a rotational oscillation about the central suspension means. The sensor also includes at least two second suspension means coupling the detection unit and the substrate for providing a response behavior specific to rotation about at least one of the drive axis and the detection axis.

The head of a powered toothbrush includes a first tuft block mounted for rotational oscillation about an axis generally perpendicular to the outer surface of the head, and a second tuft block having fixed bristles or bristles independently movable by being mounted on an elastomeric base. The second tuft block oscillates perpendicular to a longitudinal axis of the head and in an in and out direction perpendicular to the outer surface of the head. A third stationary block may also be mounted on the head of the powered toothbrush. The bristles on the first, second, and third tuft blocks may be of various lengths, colors and stiffness, and may be mounted perpendicularly to or at an angle to the outer surface of the head.

A positive displacement rotary machine with a body having an internal spherical working surface divided into bypass and propulsion areas, a rotor with a working rotational surface, a ring working cavity formed by the working surfaces of the body and rotor, and a C-shaped separator mounted in part of the cavity at an angle to a plane of the rotor rotation. The cavity is partitioned by the separator at the bypass area, and the working medium openings are located from opposite sides of the separator. The working surface of the rotor has at least one slot. In each slot is mounted a piston capable of sealing the working cavity, and performing rotational oscillations in a slot plane. The piston is at least in the form of a part of a disk and has at least one through-cutout for the separator passage, and can seal the through-cutout at the propulsion area.

Micromechanical structure, in particular a yaw rate sensor having a substrate including a main plane of extent for detecting a first yaw rate about a first direction perpendicular to the main plane, a second yaw rate about a second direction parallel to the main plane, and a third yaw rate about a third direction parallel to the main plane and perpendicular to the second direction, includes a rotational oscillating element driven to perform rotational oscillation about a rotational axis parallel to the first direction. The micromechanical structure includes a yaw rate sensor configuration for detecting the first yaw rate that is completely surrounded by the rotational oscillating element in a plane parallel to the main plane. The micromechanical structure includes at least one first connection of the yaw rate sensor configuration on the rotational oscillating element, and at least one second connection of the yaw rate sensor configuration on the substrate.