278results about How to "Effective damping" patented technology

Porous damping material (40) is attached to an entire inner circumference of the fan shroud (20) opposing to an end of a fan (4) and is exposed to opposing space without using conventional perforated metal. Accordingly, jet noise caused by strong swirl between the fan (4) and the fan shroud (20) can be damped by the damping material (40) and impulsive sound scarcely occurs. Thus, both of the impulsive sound and the jet noise can be effectively damped, thereby securely reducing noise. The pours member (401) constituting the porous damping material (40) is a die-molding product made by a die (150) having a cavity (153).

A cavity unit of an ink-jet printhead is formed by laminating a base plate formed with pressure chambers, a spacer plate, a manifold plate, a damper plate, a cover plate, and a nozzle plate formed with nozzles. The manifold plate is formed with a manifold chamber that penetrates through the manifold plate. The damper plate is formed with a recess on a side facing away from the manifold chamber and a damper wall left on a side facing the manifold chamber to have a partial thickness of the damper plate. The damper plate is bonded to the manifold plate on an opposite side from the base plate such that the damper wall is positioned to face the manifold chamber. The cover plate is bonded to the manifold plate to seal the recess. Because the damper plate is relatively thick while the damper wall is thin enough to absorb a pressure wave in the manifold chamber generated upon ink ejection, the damper plate is easy to handle.

A suspension system for a vehicle, including: an electromagnetic actuator configured to generate an actuator force and including a sprung-side unit connected to a sprung portion, an unsprung-side unit connected to an unsprung portion, and an electromagnetic motor; a connecting mechanism; and a controller including a target-actuator-force determining portion, the determining portion being configured to determine a target actuator force based on: (a) a required acting force that is a force required to act between the sprung and unsprung portions; and (b) an inertial force of one of the sprung-side and unsprung-side units, while utilizing: a first transfer function by which is outputted an amount of a displacement of the one of the sprung-side and unsprung-side units when the actuator force is inputted; and a second transfer function by which is outputted an actual acting force which actually acts between the sprung and unsprung portions when the displacement amount is inputted.

A damping device for a micromechanical sensor device, having at least one first intermediate layer having at least two sections, a second section being situated around a first section, a lateral distance being provided between the first and the second section, and an elastic device being provided between the first section and the second section as an integral part of the first intermediate layer.

The invention relates to a vacuum pump which comprises a driver, a mounting base, a first substrate, a rotor, a pump ring, a second substrate and a cover. The driver is provided with a driving shaft and is arranged on the lower side of the mounting base; the mounting base is provided with an air inlet hole and a first through hole which are communicated with each other; the first substrate is provided with a second through hole; the rotor is provided with blades; the second substrate is provided with a third through hole; the driving shaft penetrates through the first substrate and is matchedwith a rotor which is arranged in a hollow cavity formed by the first substrate, the pump ring and the second substrate; the first through hole, the second through hole and the hollow cavity are communicated with the third through hole; and the cover, the second substrate, the pump ring and the first substrate are assembled on the upper side of the mounting base through mounting bolts. The vacuumpump also comprises a silencing ring which forms a first chamber and a second chamber which are communicated with each other. The pump ring is provided with an air outlet through hole and an air outlet hole which are communicated with each other; the first chamber is communicated with the hollow cavity; and the second chamber is communicated with the air outlet hole. The vacuum pump of the invention has the advantages of noise reduction and good radiating effect.

An air-packing device has an improved shock absorbing capability to protect a product in a container box. The air-packing device is comprised of a plurality of edge air-packing blocks. Each edge air-packing device includes a wall portion that surrounds and supports a pocket portion that holds an edge of the product to be protected such that the pocket portion does not contact the ground when shocks are applied to the air-packing device. Each of the enclosure portion and the pocket portion is configured by first and second thermoplastic films which are bonded at predetermined portions thereby creating a plurality of air containers. Each of the air containers has a check valve for allowing the compressed air to flow only in a forward direction.

An annular combustion chamber comprising axial walls interconnected by a chamber end wall having a coefficient of thermal expansion that is different from that of the axial walls, the chamber end wall being provided with a plurality of inner and outer fastener tabs secured by fastener systems to the end portions of the axial walls. Each fastener system comprises a bolt, a nut tightened onto one of the ends of the bolt, and a slideway bushing disposed around the bolt between the nut and the end portion of the corresponding axial wall, a determined amount of radial clearance being provided between the nut and the end portion of the axial wall so as to enable the chamber end wall to expand radially freely in operation relative to the axial walls.

A power tool has a handle assembly which is biased by a torsional spring. The torsional spring has an engaging arm the position of which is fixed relative to the housing by an adjusting mechanism. The adjusting mechanism has a lever which extends outside the housing of the power tool, and a cam surface, and is mounted on and rotatable at least partially around an axle. In use, the tension in the torsional spring may be adjusted by movement of the lever. The lever is moved, causing rotation of the adjusting cam around the axle. As a result, the cam surface causes the engaging arm of the spring to be moved axially along the axle and more or less tension is applied to the torsional spring.

A damping arrangement for a blade (20) of an axial turbine, in particular a gas turbine, includes a damping element (17) which is arranged in a recess (16) in the blade aerofoil (10) of the blade (20) and frictionally dampens the vibrations of the blade (20). In such a damping arrangement, simplified manufacture and assembly and a reliable and effective function are achieved by the recess being configured as a cavity (16) extending in the radial direction through the inside of the blade aerofoil (10), the damping element (17) being inserted in the radial direction into said cavity (16).