Abstract: An electromagnetic switch includes: at least two stationary electric contacts; and a moveable contact, wherein the electromagnetic switch is configured for reciprocal motion of the moveable contact into and out of contact with the stationary electric contacts, wherein the moveable contact is configured so that at least three contact points occur in the reciprocal motion, and so that a triangle defined by the at least three contact points encloses a center of force of the movement.
December 2, 2013
Date of Patent:
December 11, 2018
Bennett Sprague, Ian C. Dimen, Scott I. Kohn, Andrew Titus, Jeffrey G. Reichbach, Gregory Michael Goetchius, Garland Dughi
Abstract: A protective case can be used with a mobile device having front and back surfaces and side surfaces extending between the front and back surfaces, including a top side, a bottom side, a right side, and a left side, the mobile device having a screen on the front surface. The protective case can include a shell configured to engage and substantially surround at least three of the surfaces of the mobile device and preferably all or nearly all surfaces of the mobile device while still capable of allowing the user to functionally interact with biometric sensor (such as a fingerprint sensor) and/or not interfere with the intended functionality of the proximity sensors of the mobile device.
July 18, 2016
Date of Patent:
December 4, 2018
Andy Fathollahi, Timothy Alan Hemesath, Kitty Yu-Ling Yung, Carlos Del Toro
Abstract: An electromagnetic switch device for starter includes a connector assembly which has a plurality of connectors formed by stamping a conductive material and which forms a motor electric circuit and an electric circuit for supplying power to an attraction coil and a holding coil, wherein the connector assembly includes: a connector (A) connecting one of a pair of sub fixed contacts and a battery terminal; a connector (B) connecting the other one of the pair of sub fixed contacts, and one end of the attraction coil and one end of the holding coil; a connector (C) connecting the other end of the attraction coil and a motor terminal; a connector (D) connecting one end of a sub coil and an S terminal; and a resin member integrally fixing at least one pair of the connector (A), the connector (B), the connector (C), and the connector (D).
Abstract: A superconducting magnet device includes a vacuum container having a tubular barrel portion; a magnet assembly including a superconducting coil, a refrigerant tank, and a radiation shield, the magnet assembly being housed in the vacuum container; a supporting block fixed to the barrel portion and protruding beyond the barrel portion to the inside of the vacuum container; and a connecting portion which connects the magnet assembly and the supporting block to each other such that the magnet assembly is spaced apart from the barrel portion within the vacuum container. The connecting portion has thermal conductivity lower than thermal conductivity of the supporting member. The supporting member receives weight of the magnet assembly via the connecting portion while protruding inwardly beyond at least an outer circumference surface of the radiation shield of the magnet assembly.
Abstract: A damping assembly is described herein for use in a device having moving aerodynamic surfaces including a first component comprising a back iron and at least one permanent magnet, said at least one permanent magnet providing a first magnetic field, and an electrically conductive second component, said electrically conductive second component and said first component being positioned coaxially about a central axis with said at least one permanent magnet being positioned between said back iron of said first component and said electrically conductive second component; the assembly further comprising means for rotating one or both of said at least one permanent magnet of said first component and said electrically conductive second component about said central axis to cause relative rotational movement between the at least one permanent magnet and second component, to thereby induce a variable magnetic flux in said electrically conductive second component and cause eddy currents to develop.
Abstract: A stator for an electric motor includes: a stator core that includes a plurality of teeth on which insulating portions are provided; and a coil formed by winding a wire around each of the teeth. A lead-in opening and a lead-out opening are formed in insulating portions provided on an outside diameter side of the stator core. The lead-in opening leads in a crossover wire of the coil routed to an outer peripheral side of the insulating portions to the side of the teeth. The lead-out opening leads out the crossover wire of the coil from the side of the teeth to the outer peripheral side of the insulating portions. The length from an axial end portion of the stator core on an insulating portion side to the lead-in opening is different from the length from the axial end portion to the lead-out opening.
Abstract: An electric supercharger comprises a motor, for example a switched reluctance motor. The motor includes a stator assembly (101) comprising a plurality of pairs of windings (103A-C), each pair of windings (103A-C) comprising a first winding for forming a first pole and a second winding for forming a second, opposite, pole, each winding having an input termination (105) and an output termination (107). The terminations (105, 107) of each pair of windings (103A-C) are arranged such that the input terminations (105) for the first and second windings are located adjacent one another and the output terminations (107) of the first and second windings are located adjacent one another.
Abstract: An electromechanical transducer apparatus is disclosed and includes a housing. A static portion is substantially immobilized within the housing and includes a magnetic flux generator for generating magnetic flux, a pair of pole pieces for coupling magnetic flux through at least one of a first magnetic circuit and a second magnetic circuit, and a coil disposed to electromagnetically interact with one of the magnetic circuits. The static portion is thermally coupled to the housing via a low thermal resistance path to permit removal of heat. A movable portion includes first and second closing pieces separated from the pole pieces by first and second gaps. The closing pieces are mechanically coupled and supported for reciprocating motion about an equilibrium position which varies the gaps to cause a variation in magnetic reluctance in each of the first and second magnetic circuits.
March 12, 2015
Date of Patent:
November 6, 2018
Keith Borthwick Antonelli, Geoffrey Donald Stalker Archibald, Ryan John Biffard, Kristjan Tod Gottfried, Douglas Bruce Jelstad, Takao Kanemaru, Briac Medard de Chardon, Sylvia Joan Smullin, Thomas Walter Steiner
Abstract: A motor generally includes a housing, a cover, and a cooling fan. The cover is provided with multiple air guiding fins and defines multiple first inlet holes corresponding to the air guiding fins for collecting some of the air current generated by the cooling fan. Furthermore, the cover is provided with multiple wind-catching projections. The housing defines multiple second inlet holes near its opening. The cover is installed to the housing such that the wind-catching projections are respectively located above the second inlet holes of the housing, so as to collect some of the air current. Furthermore, multiple recesses are defined between the wind-catching projections, so that some of the air current may flow along the outer surface of the housing via the recesses to further cool down the housing.
Abstract: A stator and a rotary electric machine include a stator core including a plurality of stacked annular electromagnetic steel plates with coupling portions. The coupling portions are arranged with a pitch of an integral multiple of a central angle. The central angle is defined as an angle between two adjacent magnetic poles of the same polarity relative to a rotational center of the rotor. When a number of the coupling portions is an odd number, fixing portions are arranged with the same pitch as the pitch of the coupling portions, or with a pitch corresponding to a divisor of the pitch of the coupling portions. When a number of the coupling portions is an even number, the fixing portions are arranged with a pitch corresponding to a divisor of the pitch of the coupling portions, or a divisor of 180°.
Abstract: An actuator includes a shape-memory alloy (SMA), a power supply that transmits electrical current, a heat source positioned proximate to the SMA, a heat sink positioned proximate to the SMA, and a control module. The control module causes the power supply to transmit the electrical current to the heat source in response to receiving a first signal, thereby causing the heat source to heat the SMA via induction heating. The control module also causes the power supply to cease transmitting the electrical current to the heat source in response to receiving a second signal, thereby causing the heat source to stop heating the SMA. The control module also causes the power supply to transmit the electrical current to the heat sink in response to receiving the second signal, thereby causing the heat sink to cool the SMA via magneto-thermal convection cooling.
Abstract: A motor generally includes a housing, a cover, an air collecting structure, and a cooling fan. The cover defines a plurality of inlet holes and is provided with a plurality of wind-catching projections. The air collecting structure, adapted to be fixed to the cover, defines a plurality of through holes aligned with the inlet holes of the cover. The housing defines a plurality of inlet holes. The cover is installed to the housing such that the wind-catching projections are respectively located above the inlet holes of the housing, so as to collect some of the air current. Furthermore, a plurality of recesses are defined between the wind-catching projections, so that some of the air current may flow along the outer surface of the housing via the recesses to further cool down the housing.
Abstract: A motor structure includes a housing, a cover, an air collecting structure fixed to the cover, an air guiding shell mounted around the housing and the air collecting structure, and a cooling fan. The cover defines a plurality of inlet holes. The air collecting structure defines a plurality of through holes aligned with the inlet holes of the cover, so as to provide a path for allowing one portion of the air current generated by the cooling fan to enter the housing. The housing defines a plurality of inlet holes and a plurality of outlet holes. One portion of the air guiding shell is located above the inlet holes of the housing to form another path for allowing another portion of the air current to enter the housing.
Abstract: Provided is a rotor member that can contribute to an easy assembling operation and components thereof can be reused. The rotor member includes a magnet mounting member having a first end and a second end, a plurality of magnets arranged radially outwardly of the magnet mounting member, and a tubular holding member arranged radially outwardly of the plurality of magnets and holds the magnets between the holding member and the magnet mounting member. The magnet mounting member includes a slit that radially penetrates the magnet mounting member and extends in a predetermined axial-direction section.
Abstract: An energy harvesting apparatus includes a housing that includes an internal portion filled with dielectric liquid in a vacuum state, first and second electrode portions that are disposed to face each other in the housing and configured to be polarized with different polarities, a first layer that forms a path along the internal portion of the housing to allow the dielectric liquid and bubbles generated from the dielectric liquid to flow through the path, and a second layer configured to insulate the first and second electrode portions from the housing. The bubbles are generated from the dielectric liquid when thermal energy is applied to the housing. The first and second electrode portions may change a dielectric constant of the dielectric liquid when the bubbles move between the first and second electrode portions to generate current.
Abstract: A rotor shaft is configured hollow from an end face on a counter driving side to the front of a proximal end portion of a main plate of a cooling fan. Ventilation holes communicating with a hollow section are provided on a side surface of the rotor shaft. A labyrinth is provided between an end portion on the counter driving side of the main plate and a bracket. According to rotation of the cooling fan, cooling wind enters from the end face, passes through the hollow section, and passes through a ventilation path configured by the main plate and the bearing section via the ventilation holes. The cooling wind is exhausted via an exhaust port provided in the bracket.
Abstract: Electric motor includes a housing provided with an opening equipped with a membrane forming a barrier to liquid water between the inside and the outside of the housing but permeable to water vapor, the stator being liquid cooled and the motor having an internal fan to generate a forced circulation of air inside the motor, the membrane being situated in a region in which the forced circulation of air exposes it on the inside to a pressure higher than atmospheric pressure.
March 6, 2015
Date of Patent:
October 16, 2018
Hubert Lotz, Mickael Douvry, Thierry Pera, Philippe Ciciliani
Abstract: A rotary electric machine integrated with a control device includes: a housing composed of a front bracket and a rear bracket and supporting a rotor and a stator; and a control device attached to the rear bracket. The control device is composed of: a power module having a switching element that is for energizing a stator winding of the stator; a field module having a switching element that is for energizing a field winding of the rotor; a heat sink cooling the power module and the field module; and a control board having a control circuit that controls the switching elements, the control device also including: a battery end terminal; and a grounding end terminal. Then, the heat sink is attached to the rear bracket while being insulated therefrom.
Abstract: The present application discloses an electric working machine. The electric working machine includes: a motor including a rotor; a sensor board including a magnetic sensor for detecting magnetic variation due to rotation of the rotor; and a housing which contains the motor and the sensor board. in the electric working machine, the sensor board does not cover an entire circumference of the rotor. In the electric working machine, the sensor board has a portion covering the rotor, and a portion not covering the rotor.
Abstract: A linear vibration motor is disclosed. The linear vibration motor includes a housing, a vibrator placed in the housing and an elastic component providing the vibrator with restoring force of vibration. The linear vibration motor also comprises a guide device including an internal guide device, an external guide device, a ball location device arranged between the internal guide device and the external guide device and fixed relative to the housing, and multiple balls positioned on the ball location device. The balls are propped against the external guide device and the internal guide device respectively. Moreover, the rollers will roll in presence of drive effect of the internal guide device and roll at the permanent position. The vibrator is propped in the housing by using the balls.