1212results about "Liquid resistance brakes" patented technology

Electro-rheological fluid brake or actuator devices provide controllable resistance with or without inclusion of active torque output in either direction of rotation under manual or computer control. The brake and actuator devices are suitable for use in an orthotic device for a joint, such as the knee or elbow.

A controllable brake includes a rotor supported on one shaft end. The rotor is housed within a chamber containing a field controllable material which is acted upon by a magnetic field generator to change the rheology of the material and thereby impede movement of the rotor. The shaft is supported by two bearings which, in combination with the housing define a second housing chamber adapted to enclose means for monitoring and/or controlling the brake and in this way, an integrated, compact controllable brake is provided.

Construction variable rotary magnetic current flowing deforming brake, mainly comprises a bearing end cap, sealing cap, magnetic conduction inside tube and outside tube, magnet coil, rotation shaft, positioning key, bearing, magnetic current variation liquid, rotating disc and sealing material, wherein the magnetic conduction inside tube and outside tube are both cylinders made of magnetic conduction material, and a separating arrangement is arranged on the magnetic conduction inner tube, the rotation shaft crosses the the magnetic conduction inner tube and connects with the rotating disc, the magnet coil is adhered into the magnetic conduction outer tube, and encloses the magnetic conduction inner tube, the magnetic current flowing deformation liquid is injected into the magnetic conduction inner tube, the separating arrangement is arranged on the magnetic conduction inner tube divides the brake into two chambers, which can determine to mount one or two rotating discs. The brake according to the invention can increase the magnetic current flowing deformation efficiency, and guarantees a large damping moment for the brake.

The present invention provides a washer, damper thereof, and control method thereof, by which noise is reduced by adjusting a damping force of the damper in a manner of turning on/off power of the damper according to an oscillation frequency of a vibrating body such as a washer. The control method reduces noise by supplying power to a damper in an excessive vibration state of a vibrating body such as a washer or by cutting off the power supplied to the damper in a normal vibration state of the vibrating body.

Custom fitting protective athletic equipment composed of larger compressive chambers to generally surround a body part as well a plurality of smaller compressive chambers, which can be shaped to absorb rotational impact forces, outside the larger compressive chambers. A hard or yielding shell positioned either outside the chambers or between them can provide additional impact dampening and protection. Both the larger and smaller compressible chambers preferably contain compressible fluid, such as air, another gas, gel or liquid. Valves are preferably provided in the chambers so that the fluid can be controlled when an impact is received. A method is also disclosed to use three-dimensional scanning techniques and three-dimensional 3D printer manufacturing techniques to produce the protective athletic equipment of the present invention.

A slide damper for use with an associated sliding object that is movable between a first position and a second position provides an assisted, dampened return. The slide damper includes a housing having a track, a gear on the housing and a cover configured for movement along the housing. The cover further includes a track engaging pin for engaging the housing track as the cover moves along the housing. A biasing element operably connects the cover and the housing to bias the cover to the second position. A damper assembly is disposed within the cover and includes a damper housing having a geared outer periphery, a damping material disposed in the damper housing and a rotor disposed at least in part within the damper housing for cooperating with the damping material. The rotor has a shaft and is rotatable relative to the damper housing. The rotor shaft extends through the cover and a damper gear operably connects the shaft and the housing gear. The damper assembly is selectively engaged in which the rotor rotates relative to the damper housing when the cover is moved toward the second position and movement of the damper gear along the housing gear is dampened, and disengaged in which the rotor is stationary relative to the damper housing when the cover is moved toward the first position and movement of the damper gear along the housing gear is unimpeded.

A damping mechanism that includes a housing with an inner circumferential surface defined by an assembly outer race, an axle shaft that is rotatable with respect to the housing, and a transmission assembly operatively associated with the axle shaft and disposed within the housing. The transmission assembly includes an assembly intermediate race. A fluid space that includes fluid therein is defined between the assembly intermediate race and the inner circumferential surface of the assembly outer race. A vane is disposed between the assembly intermediate race and the inner circumferential surface of the assembly outer race. The vane includes a restriction space defined therein. When the axle shaft rotates in the first direction, the transmission assembly transmits rotation from the axle shaft to the vane, and when the axle shaft rotates in the second direction, the transmission assembly transmits less rotation to the first vane than when the axle shaft rotates in the first direction.

A damper includes a housing having a cylindrical shape and filled with a viscous fluid, a first rotor rotatably received in the housing and having a first connecting portion formed at an end portion thereof, and a second rotor rotatably housed in the housing coaxially with the first rotor and having a second connecting portion formed at an end portion thereof. The first and second connecting portions engage to allow the first and second rotors together, and forms a space therebetween to allow the viscous fluid to pass therethrough. An elastic member urges the first connecting portion and the second connecting portion to connect together, and accumulates an elastic force in a state that the connection between the first and second connecting portions is released.

A heart cam and damper unit includes a base member having fixed cylindrical portions and a stopper portion, a rotating member having a movable cylindrical portion which is rotatably assembled to the fixed cylindrical portion with a viscous fluid interposed between the movable cylindrical portion and the fixed cylindrical portions, and a pinion gear rotating integrally with the movable cylindrical portion, a heart cam member rotatable fitted around an outer periphery of an outwardly located one of the fixed cylindrical portion and the movable cylindrical portion, and a device interposed between the base member and the heart cam member and adapted to rotatably urge the heart cam member toward the stopper portion. The heart cam and damper unit is interposed between a main body portion and a movable portion which undergoes opening and closing action with respect to the main body portion and is constantly urged in an opening direction.

In one aspect, there is provided a damper control system for a reciprocating pump assembly according to which control signals are sent to electromagnets. In another aspect, there is provided a method of dampening vibrations in a pump drivetrain according to which a beginning of torque variation is detected and at least a portion of the torque variation is negated. In another aspect, signals or data associated with pump characteristics are received from sensors, torque characteristics and damper response voltages per degree of crank angle are calculated, and control signals are sent to electromagnets. In another aspect, a damper system includes a fluid chamber configured to receive a magnetorheological fluid; a flywheel disposed at least partially within the fluid chamber and adapted to be operably coupled to a fluid pump crankshaft; and a magnetic device proximate the flywheel. The magnetic device applies a variable drag force to the flywheel.

The invention relates to a multiple-disc type magnetorheological brake which mainly comprises a transmission shaft, a wheel hub, a drive friction plate group, a driven friction plate group, inner and outer magnetic isolation rings, an exciting coil with a U-shaped iron core, magnetic-conducting side plates and a magnetic isolation casing. A sealing ring is used for sealing magnetorheological fluid between the drive friction plate group and the driven friction plate group; the drive friction plate group and the driven friction plate group are respectively sleeved on the magnetic isolation rings and the wheel hub through splines; the drive friction plate group is separated from the driven friction plate group by the inner magnetic isolation ring and the outer magnetic isolation ring; the exciting coil with the U-shaped iron core is directly spliced in iron core jacks of the magnetic conducting side plates; and the braking torque can be changed through changing the current intensity of the coil. When the braking torque is not enough, the quantity of friction plates can be increased or the quantity of the exciting coil with the U-shaped iron core can be increased to adapt to the big torque braking. The multiple-disc type magnetorheological brake has the advantages that the structure is compact, the braking torque is big, the assembly and the disassembly are convenient, the coil is easily used for radiating the heat, and the number of turns wounded by the coil is more.

According to problem solving means of the present invention, in a suspension device (S) comprising a motion transforming mechanism (T) for transforming a linear motion of a linear motion member (1) into a rotational motion of a rotating member (2) and a motor (M) connected to the rotating member (2) in the motion transforming mechanism (T), an air spring (AS) is provided, the air spring (AS) including a tubular air chamber (22) connected to the motor (M), an air piston (37) connected to the linear motion member (1) and being tubular and smaller in diameter than the air chamber (22), and a diaphragm (27) interposed between the air chamber (22) and the air piston (37), a stopper (38a) is provided on an outer periphery of the air piston (37), and a stopper seat (46) is provided on an inner periphery of the air chamber (22) so as to be put in abutment against the stopper (38a) upon maximum extension of the suspension device involving relative separation of the air chamber (22) and the air piston (37) with respect to each other.

A buckling restrained brace includes an elongate, hollow sleeve, an elongate yielding core extending substantially through the length of the sleeve, and a buckling constraining element between the yielding core and the inner surface of the hollow sleeve and spaced apart from at least one surface of the yielding core, leaving a gap therebetween. The buckling constraining element may be spaced apart from and, thus, the gap may exist between two or more surfaces of the yielding core. Additionally, an inner sleeve, or liner, may be positioned between the buckling constraining element and the yielding core, with the liner being spaced apart from at least one surface of the yielding core. The buckling restrained brace is useful in absorbing loads, such as seismically induced loads, that are exerted upon a steel frame.

This invention is a rotary motion control device comprising a housing, a rotor for connection to a rotary member to be braked, a magnetorheological material contacting the rotor, a first set of magnets having alternating magnetic orientation and a second set of magnets having alternating magnetic orientation, the first and second sets of magnets are adapted for selective alignment with respect to each other so that the magnetic orientation of one of the magnet sets may be repositioned relative to the other of the magnet sets to modulate the overall field strength of the magnets and change the viscosity of the magnetorheological material so that the shearing force on the rotor is increased or decreased. The invention further includes a fishing reel with a brake and a method for controlling the speed of a rotating member.

A vibration damping apparatus has a first looped rope member and a second looped rope member each having a loop portion formed of a rope member in a loop shape, the rope member being formed by twining a plurality of linear members. Further, the vibration damping apparatus has a first base member and a second base member disposed in an up-and-down of the first looped rope member. The first looped rope member is fixed to the first base member and the second base member with the loop portion standing up. The second looped rope member is fixed to an intersecting portion, in one of the first base member and the second base member, intersecting a fixing portion of the first looped rope member with the loop portion standing up.

Disclosed is a refrigerator. The refrigerator includes a body, a refrigerator door for opening/closing a front surface of the body, with the refrigerator door having an opening, an auxiliary door for opening/closing the opening of the refrigerator door, and a damping unit coupled to a hinge shaft of the auxiliary door to control an opening/closing speed of the auxiliary door. The damping unit includes a case, a rotating member rotatably installed in the case, oil filled in the case to apply resistance against rotation of the rotating member, a fixing member coupled to an end portion of a rotating shaft of the rotating member to rotate together with the rotating member, and an elastic member provided between the case and the fixing member to apply elastic force to the fixing member in a direction opposite to an opening direction of the auxiliary door. It is possible to stably rotate the auxiliary door while controlling the rotational speed of the auxiliary door.

A rotary damper device includes a case in which a viscous fluid is filled and sealed, a rotation shaft relatively rotatably supported by the case, a rotation vane formed protruded from the rotation shaft, and a check valve mounted on a tip part of the rotation vane. A passage where the viscous fluid passes through is formed in the rotation vane. The check valve is provided with an opposing face part facing the passage and a frame body interposing the rotation vane. An elastic member for energizing the opposing face part of the check valve for closing the passage of the rotation vane is formed in either the rotation vane or the opposite side of the frame body of the opposing face part.

The present invention is a double path torsion isolator for use in conjunction with a torque converter. Each of the two vibration paths includes a flange with a spring connection to each of the torque converter cover and an output connection attached to the transmission shaft. The torque converter turbine is connected to one of the flanges to provide a different frequency to the associated vibration path. When the lockup clutch is engaged, the engine vibration is divided along the two vibration paths toward the common output connection. The vibration frequency of the paths are adjusted so that the frequencies of the two paths are 180° out of phase at the output connection providing a vibration cancellation effect to the output connection.