39results about How to "Reduce and eliminate vibration" patented technology

A stabilizing device for reducing or eliminating the vibration in an object to allow for easier and more accurate operation of the object. The stabilizing device includes an object bracket, legs, side arms and front arms. The legs and arms move the vibrations away from the object bracket and the object and eliminate or reduce the vibrations. The legs and arms include a core surrounded by damping material. The damping characteristics of the legs, side arms and front arms can be adjusted by selecting damping material having different damping characteristics depending on the type of object to be used with the stabilizing device and the type of vibrations to be reduced or eliminated.

A muffler for reducing the sounds of combustion gases exhausted from an internal combustion engine including an elongated fluid passage extending between an inlet and an outlet such that the outlet is in fluid communication with the inlet. Further, the inlet being connectable with the gases exhausted from the engine and the outlet being connectable with the atmosphere. The muffler further including an outer tank surrounding the passage and a tubular connector having a first end in fluid connection with the passage and a second end in fluid connection with the tank such that the connector produces a fluid connection between the passage and the tank. The connectors having a perforated resistance plate to restrict the fluid flow between said passage and said sound chamber thereby reducing the severity of the sound or fluid pulses entering and exiting said sound chamber, perforations in said perforated plate forming an open portion of said plate and said open portion being less than 60 percent.

The device to actively control the vibrations of an articulated arm consisting of a plurality of segments each comprising at least its own actuator associated with a hydraulic drive circuit including a block valve. At least one of said actuators is associated with an hydraulic control circuit of the vibrations, comprising at least a sensor able to detect the vibrations and / or the position of one or more segments, a processing unit to process the signals of the sensor / sensors and a pump commanded by the electronic command board and cooperating with said block valve. The hydraulic control circuit is associated with the hydraulic drive circuit.

An electric tool includes a rotary wheel driven to rotate around a central axis thereof, an action member configured to bear a cutter of the electric tool, and a counterweight. The rotary wheel drives the action member such that it reciprocates linearly in a first direction. The rotary wheel simultaneously drives the counterweight such that it not only reciprocates linearly in the first direction in an opposite manner to the action member, but also performs reciprocating swinging movement in a plane perpendicular to the central axis. The first direction is parallel to the plane.

Embodiments of the invention relate to a cable force feedforward approach that takes into account the cable force in the counter-mass trajectory computation to reduce or eliminate vibration of the lens body caused by the cable force disturbance and corrective force exerted by the trim motors. In one embodiment, a method provides cable force feedforward control for a counter-mass of a stage with a cable connected to the counter-mass and using the cable force feedforward control to control one or more trim motors to produce a trim motor output force to be applied to the counter-mass, the counter-mass moving in response to a reaction force from movement of the stage. The method comprises measuring a counter-mass position y of the counter-mass in response to forces applied to the counter-mass; measuring a cable force ƒ exerted on the counter-mass by the cable which is connected to the counter-mass; generating a cable force function {circumflex over (ƒ)}(y, {dot over (y)}) of the measured cable force ƒ versus the counter-mass position y; and computing the trim motor output force u asu≅-f+w·f^⁡(y,y.),where w is a weighting function having a value from 0 to 1 and is selected for optimization.

The invention discloses a positioning device for a workpiece fixture in ion beam polishing equipment. The scheme includes that an annular positioning plate and the chuck type workpiece fixture interact with each other, and the annular positioning plate used as a positioning reference is horizontally and fixedly mounted, so that the workpiece fixture can be positioned by the positioning device. The positioning device is characterized in that a convex horizontal positioning plane, lifting devices and positioning pins are arranged on the upper surface of the annular positioning plate, the lifting devices and the positioning pins are symmetrically arranged along the peripheral edge of the positioning plate, a positioning plane which can cling to the horizontal positioning plane on the positioning plate is arranged on the fixture, and positioning holes which can be in one-to-one correspondence with the positioning pins on the positioning plate are formed in the fixture. The lifting devices lift the fixture with a clamped workpiece to a certain altitude and then slowly descend, so that the two positioning planes can completely cling to each other, all the positioning pins can be inserted into the positioning holes, and the workpiece fixture can be positioned. The positioning device has the advantages that positioning references are arranged on the same component, so that the workpiece fixture can be easily adjusted and can be completely positioned under the effect of the gravity of the fixture as long as the references are effectively adjusted, and the positioning device is simple in action; the positioning movement speed is controllable, so that positioning operation can be slowly carried out, and vibration can be greatly reduced and eliminated.

A rotor for turbomachines with shrouded blades comprising a row of a plurality of blades covered by an external ring, coaxial to said row of blades; the external ring being composed of a plurality of sectors, commonly referred to as shrouds, which are adjacent to one another and transversely and circumferentially attached to the end of respective blades; a damping member being arranged so as to straddle a respective pair of adjacent sectors and being pushed, in use, against radially internal surfaces of the sectors of the pair of adjacent sectors.

A Potter-Bucky device for a radiation image recording apparatus in which an image recording medium is exposed to radiation which has passed through an object in order to record a radiation image of the object on the recording medium includes a grid which is movably supported between the object and the recording medium and is reciprocated parallel to the recording medium. A counter-weight is connected to the grid and is reciprocated in synchronization with the grid but in an opposite direction. Among other benefits and features, the disclosure reduces or eliminates vibrations produced by the reciprocating grid.

An isolating pulley comprising a hub comprising an inertia carrier, the inertia carrier having an inner surface, a spring carrier journalled to the hub, the spring carrier having a releasable driving engagement with the inertia carrier, a pulley journalled to the hub, a spring drivingly engaged between the spring carrier and the pulley, a clutch spring having a frictional engagement with the inner surface, and which frictional engagement is partially releasable upon a temporary, pressing contact of the pulley upon the clutch spring.

The present invention refers to a vibration damping connector (100) for reducing vibrations between a vibration prone system and an optical imaging system, said vibration damping connector comprisinga first part (1) adapted to be connected to said optical imaging system,a second part (2) adapted to be connected to said vibration prone system, andat least one first shock absorbing element (3), a portion of said first part (1) is arranged inside a portion of said second part (2) along a central axis (A) or a portion of said second part (2) is arranged inside a portion of said first part (1) along a central axis (A) and said at least one flexible shock absorbing element (3) is arranged between said first part (1) and said second part (2), said vibration damping connector (100) further comprisesat least one fastening device (4) for fastening said first part (1) to said second part (2) and said fastening device (2) presses said first part(1) to said second part (2) via a second shock absorbing element (5). Furthermore, use of the vibration damping connector, in an optical system is disclosed.

A cord material suitable for use in lined textile structures with a gliding component includes a plurality of uniform strands, and a deviant strand. The deviant strand is different from the uniform strands in some characteristic affecting aerodynamic or hydrodynamic properties of the cord, such as size or surface properties. Each uniform strand can have a substantially equal cross section area, while the deviant strand has a cross section area at least five times greater than one of the uniform strands. The strands can be braided or woven together. A major benefit of the material can be that vibration induced drag is significantly reduced or eliminated in lines made with the material. Another advantage is that lines made from the material can have more consistent, predictable line drag, which can improve the quality of handling.