44results about How to "Damp motion" patented technology

A turbomachine blade damper has a damper member with first and second damping surfaces for respectively engaging first and second surfaces of adjacent first and second blades. The damper has a seal having a first portion engaged in the damper member to resist relative movement of the seal in at least one direction and a second portion engaging at least one of the blades and advantageously forming a seal to resist upstream gas infiltration.

A magnetic particle separator (10) suitable for separating magnetic and non-magnetic particles from a thermal fluid flowing in a heating system. The magnetic particle separator (10) comprises a hollow body (10A, 10B) configured with an upper particle separation chamber (11) and for circulation of the thermal fluid between an inlet and an outlet port (12, 13), and a quieting chamber (15) beneath the particle separation chamber (11) for accumulation of the particles separated from the fluid: an annular support element (21) for permanent magnets (18) being removably fastened outside the quieting chamber (15) of the separator (10).

A turbomachine blade damper has a damper member with first and second damping surfaces for respectively engaging first and second surfaces of adjacent first and second blades. The damper has a seal having a first portion engaged in the damper member to resist relative movement of the seal in at least one direction and a second portion engaging at least one of the blades and advantageously forming a seal to resist upstream gas infiltration.

The invention relates to an auto-injector (1) with a delay mechanism (36) for slowing down motion of a retraction sleeve (10) in axial direction of the auto-injector (1), the delay mechanism (36) comprising a circumferential outer wall (37) with a back collar (38) attached to a housing (2) of the auto-injector (1) and a circumferential inner wall (39) with a front collar (40) attached to the retraction sleeve (10) wherein a cavity is defined between the outer wall (37) and inner wall (39), the cavity sealed by the back collar (38) against the inner wall (39) and by the front collar (40) against the outer wall (37), the cavity filled with a viscous fluid, wherein at least one orifice is arranged in the delay mechanism (36) for allowing the viscous fluid to be pushed out as the volume of the cavity decreases due to axial motion of the component with respect to the housing. The retraction sleeve (10) is axially movably arranged in the housing (2) and serves for retracting the syringe (3) with the needle (4) into the covered position after delivering the medicament (M).

The damping device comprises a cluster of resonators with a predetermined frequency distribution, that, when attached to a main or “master” structure, is capable of absorbing irreversibly its vibrational or / and acoustic energy produced by a vi 5 brating body. the density of natural frequencies of the plurality of resonators is comprised within a curve that lies below the envelope curve determined by the formula, e( )=1 / −1.

The invention relates to a hinge arrangement, in particular refrigerator housing comprising a refrigerator door pivotably articulated thereto, with a first part, with a second part pivotably articulated to the first part via a hinge, with a piston cylinder damping unit, which is operatively arranged between the first part and the second part for damping a pivoting movement of the two parts relative to one another, and which is articulated to at least one part.

The present invention is directed to optical element damping systems. In particular, an eddy current damper is disclosed. The eddy current damper includes a rod, a series of conducting plates coupled to the rod, and layers of magnets. The alternating layers have alternating magnetic fields. When an optical element moves, the optical element will exert a force on the rod. The rod causes the conducting plates to move relative to the alternating layers of magnets to generate eddy currents within each of the conducting plates, such that the eddy currents damp the motion of an optical element. In an alternative embodiment, an eddy current damper motion amplifier is used to provide additional mechanical advantage that significantly increases the damping provided by the eddy current damper. Eddy current dampers are provided within conventional scanning lithography devices and optical maskless lithography devices to improve performance by stabilizing optical element motion.

The present invention relates to a member (1) arranged to act between two parts of a vehicle which are movable in relation to each other. The member (1) comprises a first portion (2) having an elongated rod (6) with external threads (7) and a second portion (3) having a nut (8) rotatably provided on the rod (6) so that the length of the member (1) during a rotary motion between the rod (6) and nut (8) is variable in an axial direction (L). An electric rotor machine (10), having a stator (11) and a rotor (13) which is rigidly connected to said nut (8), is arranged to influence said rotary motion. The rotor (13) and nut (18) are so positioned in relation to each other that at least a radial plane with respect to the axial direction (L) extends both through the rotor (13) and the nut (8).

A vessel includes a riser and / or tendon tensioning construction. A connector, such as an arm or deck structure, is suspended from cables movable relative to cable guides. The connector carries two or more risers and / or tendons extending from a subsea structure to above water level. The free ends of the cables are attached to weights for exerting a tensioning force on the risers, which are substantially decoupled from pitch, roll and heave motions of the vessel.

A damper that provides damping to the motion caused by flow induced vibration of a bellows type expansion joint. The damper is at least partially filled with a damping medium and located at a root region of the bellows type expansion joint convolutions. The damper is manufactured in segments which have an attachment structure therebetween to facilitate retrofitting of the damper to various conduits that are experiencing or are expected to experience flow induced vibration.

An actuating system comprising a hydraulic actuator provided with a cylindrical cavity containing a piston configured to slide within the cylindrical cavity and a rod. The piston separates the cylindrical cavity into a first actuating chamber and a second actuating chamber. A first servo valve comprises a sheath including a first slider configured to slide within a cavity of the sheath on the basis of command signals from a command system. The cavity of the sheath comprises a first command chamber and a second command chamber on either side of the first slider. The first actuating chamber is fluidically connected to the first command chamber, and the second actuating chamber is fluidically connected to the second command chamber.

The present invention is a deep draft partially submersible and buoyant floating vessel comprised of at least three independent vertical columns. The columns have an upper column with an upper column diameter and a lower column integrally connected to the upper column with a lower column diameter smaller than the upper column diameters. The lower column contains a variable ballast, a free flooding ballast, and a lower column fixed ballast. The lower pontoon is connected to each lower column opposite the upper column. The lower pontoon has lower pontoon fixed ballast means. A deck is located on the columns for supporting a tensioner assembly.

A conveyor (10) includes at least one endless conveying device (20) having a conveying section (22) having a conveying surface (21), on which conveyed goods (11) can be conveyed. The conveying device (20) are held on a frame (12) using at least two deflection rollers (40), thereby enabling it to circulate endlessly. A driving wheel (51) with a rotary axle (52) is coupled to the conveying device (20) such that the former can be set into a rotational motion by the latter. The rotary axle (52) of the driving wheel (51) is coupled to the damping device (50) such that vibrations in the rotation of the conveying device (20) can be damped. The rotary axle (52) of the driving wheel (51) is supported on the frame (12) such that it can move with translatory motion. The damping device (50) can dampen a translatory motion of the rotary axle (52).

A stop module has a base body, a stop element configured for objects moving in a direction of motion in a movement plane and located on the base body, a drive device for moving the stop element between a first terminal position, in which the stop element protrudes into the movement plane of the objects, and a second terminal position, in which the stop element enables a motion of objects in the movement plane, and a damping device cooperating with the stop element for damping a motion of the stop element from a first stop position into a second terminal stop position, which is offset relative to the first stop position at least approximately in the direction of motion of the objects, when an object is resting on the stop element, the damping device being configured so as to damp the motion of the stop element from the first stop position to the second terminal stop position with a rotation damper.

An aircraft exterior door installation with a door attached to an airframe. A damper is arranged to damp motion of the door as it is opened by rotating it away from the airframe. A coupling mechanism couples the damper with the door over an opening damping range and decouples the damper from the door at the end of the opening damping range. The damper does not damp the motion of the door as it opens beyond the opening damping range. Instead of damping the door over its full range of motion, it is only damped over a limited inner range of its motion. A further advantage of decoupling the door and the damper is that the damper does not need to extend into the airflow to the same extent as the door, thus minimising aerodynamic drag.

A valve train of an internal combustion engine equipped with a valve reciprocated by a cam is equipped with a spring seat manufactured in order to prevent the surging of a coil spring. A spring seat having a squeeze film effect of damping the axial motion of a coil spring is provided at one end of the coil spring in a closing direction. The spring seat is configured to be provided with an oil slit which radially intersects and extends helically around a valve axis.

A range extractor hood includes a screen, at least one filter element and at least one pivot bearing which swingably supports the at least one filter element on the screen. At least one locking member retains the at least one filter element to the screen. Located on the screen is a releasing device for, at least partially, releasing the locking member and retention of the filter element.

A damped poppet valve is disclosed. The valve has a valve element movable into and out of engagement with a valve seat to open and close the valve. A damping piston attached to the valve element is slidably received within a damping chamber along a path of travel toward and away from the valve seat. The chamber has an orifice which is small relatively to the cross-sectional area of the piston. The piston forces fluid through the orifice as it moves along the path of travel, thereby damping motion of the valve element.

A damper that provides damping to the motion caused by flow induced vibration of a bellows type expansion joint. The damper is at least partially filled with a damping medium and located at a root region of the bellows type expansion joint convolutions. The damper is manufactured in segments which have an attachment structure therebetween to facilitate retrofitting of the damper to various conduits that are experiencing or are expected to experience flow induced vibration.

The present invention is directed to optical element damping systems. In particular, an eddy current damper is disclosed. The eddy current damper includes a rod, a series of conducting plates coupled to the rod, and layers of magnets. The alternating layers have alternating magnetic fields. When an optical element moves, the optical element will exert a force on the rod. The rod causes the conducting plates to move relative to the alternating layers of magnets to generate eddy currents within each of the conducting plates, such that the eddy currents damp the motion of an optical element. In an alternative embodiment, an eddy current damper motion amplifier is used to provide additional mechanical advantage that significantly increases the damping provided by the eddy current damper. Eddy current dampers are provided within conventional scanning lithography devices and optical maskless lithography devices to improve performance by stabilizing optical element motion.

A disc brake assembly includes an anchor bracket, a guide pin, a sliding mechanism, and a damping member. The anchor bracket may have at least one bore formed therein. The guide pin may be adapted to be disposed in the at least one bore and slidably support a brake caliper relative to the anchor bracket. The sliding mechanism may be adapted to be disposed in the at least one bore and to slidably support the guide pin in the at least one bore. The damping member may damp sliding motion of the guide pin relative to the anchor bracket.

An electromagnetic-released, multi-disc, enclosed safety brake for primary use in offshore marine winch applications includes a stationary coil housing that encompasses springs that apply pressure to an armature, a pair of separator plates, three friction plates and a stationary endplate. The multi-disc brake is released by means of a DC voltage applied to the brake coil. The excited coil generates an electromagnetic force that attracts the armature across an air-gap thus reducing the spring force applied to the disc pack. The brake is applied when the DC voltage is removed from the brake coil. Various structures and methodologies for reducing vibrations in the brake are also provided.

A damping hinge includes a first joining part; a revolving part pivotably connected to the first joining part and being capable of revolving among a first position, a second position and a third position; a supporting module arranged within the first joining part for pressing the revolving part to keep the revolving part and the first joining part staying in a relative position; a second joining part fastened to the revolving part for connecting the upper cover; a first enforcement frame arranged on the first joining part; and a damping module including a damper holder pivotably connected to the second joining part, a damper consisting of a damper core fastened on the damper holder as a fixed end and an actuating portion as a free end being able to move up and down, a damper spring connected between the second joining part and the damper holder.

A rotor assembly of an electric machine includes a rotor body and a shaft assembly positioned at a central axis of the rotor assembly, and operably connected thereto. The shaft assembly includes a main rotor shaft operably connected to the rotor body, a center drive shaft located inside of the main rotor shaft, and a hydraulic damper sleeve located radially between the main rotor shaft and the center drive shaft. The hydraulic damper sleeve defines a plurality of cavities between the hydraulic damper sleeve and the center drive shaft. The hydraulic damper sleeve is configured to urge a fluid into and out of the plurality of cavities thereby damping relative circumferential motion between the main rotor shaft and the center drive shaft. A plurality of flow restrictors are configured to easily allow fluid into the plurality of cavities, while restricting flow of fluid out of the plurality of cavities.

A magnetic particle separator (10) suitable for separating magnetic and non-magnetic particles from a thermal fluid flowing in a heating system. The magnetic particle separator (10) comprises a hollow body (10A, 10B) configured with an upper particle separation chamber (11) and for circulation of the thermal fluid between an inlet and an outlet port (12, 13), and a quieting chamber (15) beneath the particle separation chamber (11) for accumulation of the particles separated from the fluid: an annular support element (21) for permanent magnets (18) being removably fastened outside the quieting chamber (15) of the separator (10).

A damping hinge includes a first joining part; a revolving part pivotably connected to the first joining part and being capable to revolve among a first position, a second position and a third position; a supporting module arranged within the first joining part for pressing the revolving part to keep the revolving part and the first joining part stay in a relative position; a second joining part fastened to the revolving part for connecting the upper cover; a first enforcement frame arranged on the first joining part; and a damping module including a damper holder pivotably connected to the second joining part, a damper consisted of a damper body fastened on the damper holder as a fixed end and a actuating portion as a free end being able to move up and down, a damper spring connected between the second joining part and the damper holder.

A shock damping mount for connecting an entertainment system, such as a television, to an exercise device, such as a treadmill, to decrease the motion of the treadmill that would otherwise be incident on the entertainment system. The device specifically utilizes a damping bracket having both a rotational connection and a spring connection that damps impact-generated motion generated by the user prior to it reaching the entertainment system.

A motion absorbing system and method for a structure includes the coupling of a container to a structure. The container has a liquid disposed therein wherein a ullage is defined above a surface of the liquid. An elastic element is positioned in the liquid. The elastic element has a natural frequency tuned to damp motion of the liquid.

A space vehicle includes one or more magnetorquers operable to change an attitude of the space vehicle in an external magnetic field, each magnetorquer comprising a coil, and a switching circuit for short-circuiting the coil of at least one of the magnetorquers so that a closed electric circuit comprising said coil is formed, for damping tumbling motion of the space vehicle in the external magnetic field. The switching circuit is configured to short-circuit the coil of the at least one magnetorquer upon occurrence of a condition indicative of end-of-life or failure of the space vehicle. The application further relates to a corresponding method of operating a space vehicle.