An embodiment of a linear motor assembly includes an armature extending linearly along an axis, the armature having a plurality of windings. The linear motor assembly also includes a magnetic assembly including a plurality of magnets arrayed in a loop configuration, a linear section of the plurality of magnets extending linearly through the plurality of windings in a direction parallel to the axis, each magnet of the linear section being oriented in the direction and configured to move in the direction due to interaction between the plurality of windings and a magnetic field generated by the magnetic assembly.

An electrical assistance device for a bicycle includes an electrical machine, a drive roller, an actuatable positioner, and a controller. The electrical machine includes a support arm and a rotor shaft, which carries the drive roller via a free wheel. The support arm is mounted on the bicycle by a pivot shaft, which pivots between a drive position and a separated position. The actuatable positioner releasably holds the support arm in the separated position. The controller controls operation of the electrical machine and is able to cause the electrical machine to produce a motive torque in a direction toward a wheel of the bicycle driven in forward movement. The controller also is able to deliver an electrical pulse to the electrical machine to produce a reaction torque in a direction opposite to the motive torque to cause the support arm to pivot, causing actuation of the positioner.

The present invention discloses an apparatus and method for electromagnetic spacecraft propulsion. The apparatus includes capacitor assemblies bracketed by electromagnetic solenoids configured in Helmholtz Coil geometries. The action of magnetic fields generated in the solenoids on segmented currents in conductive discharge elements during capacitor discharge produces unidirectional forces, while reaction momentum is carried away by Poynting Vector electromagnetic fields in conformity with the currently understood principles of electrodynamics.

A driving device includes an electric motor including a stator and a rotor rotatable relative to the stator, and a gear train connected to the rotor. The stator includes a cylindrical housing and an endcap mounted to an end of the housing; The gear train includes a gear mechanism with at least one stage, which includes a ring gear, a sun gear, planetary gears and a carrier. The ring gear is directly engaged with the endcap, which limits the position of the planetary gears of the gear train in an axial direction of the gear train.

The shock-absorber comprises: a cylinder containing a hydraulic working fluid; a piston slidably arranged in the cylinder so as to split the cylinder into two variable-volume working chambers, namely a first working chamber, or extension chamber, and a second working chamber, or compression chamber; an auxiliary conduit in fluid communication on one side with the first working chamber and on the other with the second working chamber; a train of permanent magnets slidably arranged in the auxiliary conduit so as to reciprocally move along the auxiliary conduit, dragged by the working fluid flowing between the first and second working chambers through the auxiliary conduit as a result of the reciprocating motion of the piston in the cylinder; and electric energy generating device for generating electric energy by exploiting the movement of the train of permanent magnets along the auxiliary conduit.

A device for efficient self-contained timely sequential vehicular inertial thrust drive is presented comprising two in opposing motion direction internal frequency modulated mechanical oscillators using the simultaneous and combined effort of straight line and rotational inertial reluctance of flywheels. The oscillator's mass motions are obtained with a motor-generators imbedded into large backrest flywheels reciprocally exerting pulsed drive actions and dynamic braking action onto rotors. The motor generators are controlled by a manually tunable electronic controller allowing the fine tuning of the mass motions for finding the highest thrust efficiency. The oscillator's frequency modulation is obtained with an internal reaction less angular mutual reciprocal torque pulse exertion by the motor between the large backrest flywheels against the fast spinning rotor. The internal cycle is recycling unused backrest flywheel energy back into the power supply allowing for an efficient propulsion cycle without energy loss.

A screen turning-over mechanism includes a rotating shaft connected to a screen and a motor drivably connected to the rotating shaft. The motor is connected to an electromagnetic damping loop which forms a closed path with the motor only when the motor is in a de-energized state. The rotating shaft is also connected to an elastic mechanism. When the motor is energized, the motor drives the rotating shaft to rotate to extend the screen, and the rotating shaft drives the elastic mechanism to deform elastically to store energy; and when the motor is de-energized, the elastic mechanism releases the stored energy to drive the rotating shaft to rotate to retract the screen. The screen turning-over mechanism according to the present application has a simple and compact structure, occupies a small volume of space, and has a long service life.

A locking apparatus comprises a sliding member, and a first memory alloy wire configured to engage the sliding member to exert a first force to move the sliding member in a first sliding direction to a locked position when electrical energy is applied to the first memory alloy wire. The locking apparatus further comprises a second memory alloy wire configured to exert a second force to engage the sliding member to move the sliding member in a second sliding direction to an unlocked position when electrical energy is applied to the second memory alloy wire. The apparatus further comprises a position limiting structure. When the sliding member is moved to the locked position, the position limiting structure holds the sliding member at the locked position. When the sliding member is moved to the unlocked position, the position limiting structure holds the sliding member at the unlocked position.

A stabilization system includes a payload and one or more locking systems. Each of the one or more locking systems includes a motor including a stator and a rotor configured to rotate relative to the stator, a sliding structure capable of engaging the rotor to lock the rotor, and at least one memory alloy wire configured to engage the sliding structure to exert a first force to move the sliding structure in a first sliding direction from a first position to a second position when electrical energy is applied to the at least one memory alloy wire. When the sliding structure is at the first position, the rotor is not able to rotate relative to the stator by the sliding structure. When the sliding structure is at the second position, the rotor is able to rotate relative to the stator.

A flywheel energy system includes a set of compound rotor assemblies, wherein each compound rotor assembly includes a set of disks each defined by a radial profile. The radial profile includes: a rim-transitional region defining a circumferential rim and a rim transition; an attachment-driven region and a clearance-driven transition; and a Laval-like region connecting the clearance-driven transition to the rim transition. Between each pair of adjacent disks, an attachment subassembly includes: an alignment pin arranged within a pair of adjacent central bores of the pair of adjacent disks; and a pair of attachment flanges each fastened to an opposite attachment flange in the pair of attachment flanges via a set of inter-flange fasteners and fastened to a disk in the pair of adjacent disks via a set of disk-flange fasteners.