Plural Armatures Patents (Class 310/22)
  • Patent number: 11898547
    Abstract: A pump contains a sealed chamber, a movable wall for changing a volume of the sealed chamber, and a vibration actuator which can be electromagnetically driven for displacing the movable wall to discharge fluid in the sealed chamber to an outside of the sealed chamber. Further, three axes perpendicular to each other are respectively defined as an X axis, a Y axis, and a Z axis. When a direction along the X axis is defined as an X axis direction, a direction along the Y axis is defined as a Y axis direction, and a direction along the Z axis direction is defined as a Z axis direction, an outer shape of the pump is a concave shape in a planar view from the Y axis direction.
    Type: Grant
    Filed: March 23, 2022
    Date of Patent: February 13, 2024
    Inventors: Yuta Yoshii, Chikara Sekiguchi, Shigenori Inamoto, Yuki Takahashi, Daisuke Kodama, Kenta Ueda, Daisuke Kurita
  • Patent number: 11852803
    Abstract: A method includes rotating a mirror assembly in a first direction using an actuator. The mirror assembly is rotationally coupled to a base and includes a mirror. A first end of the mirror is rotationally coupled to the base, and a second end of the mirror is not supported by or attached to another structure. The method also includes rotating a reaction inertia assembly in a second direction opposite the first direction using the actuator. The reaction inertia assembly is rotationally coupled to the base. The method further include restricting movement of the mirror assembly and the reaction inertia assembly in multiple degrees of freedom using multiple flexures.
    Type: Grant
    Filed: October 28, 2020
    Date of Patent: December 26, 2023
    Assignee: Raytheon Company
    Inventor: Christopher A. Cox
  • Patent number: 11747612
    Abstract: An instrument for moving and positioning of an optical element in beamlines comprises a mounting structure to which one (or more) optical element(s) is mounted, as well as a reference structure, in relation to which the mounting structure is moved by means of a moving means of low (or close to zero) mechanical stiffness and in relation to which the position of the mounting structure is metered by means of a high-resolution interferometer. The invention proposes that the instrument also comprises a balance mass for receiving the reaction force from the moving means of the mounting structure, and both the mounting structure and the balance mass are attached to the reference structure by spring means, with specific stiffness properties, allowing the positioning control of the mounting structure to be done by a control system with main feedback loop with high bandwidth (>100 Hz).
    Type: Grant
    Filed: October 27, 2021
    Date of Patent: September 5, 2023
    Assignee: Centro Nacional De Pesquisa Em Energia E Materials
    Inventors: Renan Ramalho Geraldes, Ricardo Malagodi Caliari, Marlon Saveri Silva
  • Patent number: 10396646
    Abstract: An electrodynamic actuator, in particular for a microvalve or a micropump, includes a magnet arrangement for generating a magnetic field and a control element movable relative to the magnet arrangement. The control element includes an energizable air-core coil (22) which is arranged in the magnetic field and firmly coupled to a coil carrier (20) made from a nonmagnetic material.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: August 27, 2019
    Inventors: Cyril Reiter, Maik Fuchs, Johannes Dierks, Raoul Schroeder, Ralf Scheibe, Christian Hartmann
  • Patent number: 10103591
    Abstract: The present invention relates to electrical generators and, in particular, to improvements to efficiency in electromechanical energy conversion in electrical generators and electric motors. The regenerative acceleration generator coil according to the present invention takes advantage of the structure of a high impedance multiple-loop salient pole winding or low impedance bi-filar windings to create a positive armature (accelerative) reaction rather than a negative (decelerative) reaction as exhibited by prior art generators which only have low impedance multiple loops of wire making up their rotor armature. The generator of the present invention reverses these negative effects by delaying current flow in the coil until the rotating magnetic field reaches TDC.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: October 16, 2018
    Inventor: Thane C. Heins
  • Patent number: 9874716
    Abstract: A lens driving device includes a fixed member, a movable member configured to move with respect to the fixed member, a lens disposed in or on the moveable member, a connection member connecting the fixed member to the movable member, and a protective member disposed on a connection portion. The connection portion is between the fixed member and the connection member or between the movable member and the connection member.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: January 23, 2018
    Assignee: Samsung Electro-Machanics Co., Ltd.
    Inventors: Tae Kyung Lee, Hwa Sun Lee, Jong Beom Kim, Kyo Yeol Lee, Sung Sun Kim
  • Patent number: 9297207
    Abstract: A device in place as, or suitable for use as, a vibrational tool of or in a downhole assembly, the device having a first magnetic assembly which is to be, or can be, rotated relative to a second magnetic assembly and which, when so rotated, causes the second magnetic assembly to oscillate and/or reciprocate at least substantially in an axial manner; wherein the oscillating and/or reciprocating magnetic assembly, at least substantially, at either one end, or both ends, is attached to and constrained in its oscillations and/or reciprocation by a compliant member thereby allowing the output force to be distributed to the outer body of the vibrational tool and/or any attached uphole and/or downhole tooling, from the compression and extension of the compliant member in a substantially sinusoidal manner.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: March 29, 2016
    Inventors: Owen Schicker, Enda Hand
  • Patent number: 9292002
    Abstract: A timepiece escapement mechanism includes a stopper between a resonator and an escape wheel set. The wheel set includes a magnetized track with an angular period of travel over which its magnetic characteristics are repeated. The stopper includes a magnetized or ferromagnetic pole shoe that is mobile in a transverse direction relative to the direction of travel of an element of a surface of the track. The pole shoe or the track creates a magnetic field in a pole gap between the pole shoe and the surface. The pole shoe is opposite a magnetic field barrier on the track just before each transverse motion of the stopper commanded by the periodic action of this resonator. The stopper is multistable and arranged to occupy at least two stable positions.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: March 22, 2016
    Assignee: The Swatch Group Research and Development Ltd.
    Inventors: Gianni Di Domenico, Jerome Favre
  • Patent number: 9124164
    Abstract: The invention relates to an electric machine (10), in particular a generator for a motor vehicle, comprising an exciter system composed of a plurality of electrically excited salient poles. The salient poles can be designed within the stator (16) or rotor (20) in the form of electromagnetically excited poles (22, 23; 24, 25) which are axially and radially oriented on the periphery and are alternatively polarized in the peripheral direction. In order to improve performance and reduce the magnetic leakage flux, permanent magnets (66), which are secured by means of a magnetically non-excitable holding element (60), are inserted into interstices (74) between the alternating poles (24, 25). The holding element (60) is bilaterally mounted in pole grooves (92, 94), is radially, axially, and tangentially resilient, and has a wave-shaped (62) and/or bead-shaped (76, 78; 86) profile.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: September 1, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Christa Bauch, Martin Schulz, Oliver Eckert, Ngoc-Thach Nguyen, Christian Dayan
  • Patent number: 8519575
    Abstract: A rotary and linear motion device includes a magnetic stator assembly, opposed electromagnetic actuators, and a linear-to-rotary converter (e.g., cam). Each electromagnetic actuator includes a coil that is configured to reciprocate relative to the magnetic stator assembly or to linearly translate in a common direction relative to the magnetic stator assembly. The electromagnetic actuators are coupled to the linear-to-rotary converter and upon reciprocation or linear translation, drive the linear-to-rotary converter in rotary or linear motion. The device may be located inside a wheel, which may be part of a vehicle. If part of a wheel of a vehicle, the device can be used to provide propulsion, steering, braking, and suspension for the vehicle.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: August 27, 2013
    Assignee: Nucleus Scientific, Inc.
    Inventors: Ian W. Hunter, Timothy A. Fofonoff
  • Patent number: 8203238
    Abstract: The present invention relates to a linear motor for a linear compressor reciprocating a moving member linearly inside a stationary member to compress refrigerant, and more particularly, to a linear motor for a linear compressor capable of decreasing an iron loss of a flux generated when a current flows in a coil and increasing an inductance. A linear motor for a linear compressor includes an inner stator formed by stacking core blocks in a circumference direction to be insulated from each other, an outer stator formed by arranging core blocks in a circumference direction at a predetermined intervals, and winding a coil around the core blocks, and a plurality of permanent magnets formed between the inner stator and the outer stator with a predetermined gap, and reciprocated linearly due to a mutual electromagnetic force.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: June 19, 2012
    Assignee: LG Electronics Inc.
    Inventors: Yang-Jun Kang, Young-Hoan Jeon
  • Publication number: 20110140577
    Abstract: An increased frequency power generator that includes a pair of transducers located on opposite sides of a suspended inertial mass. Magnetic attraction is used to couple the mass to each of the two transducers in alternating fashion in response to vibration and other movement externally imparted on the generator. Each transducer includes a suspended magnetic element that couples and decouples to the inertial mass as it reciprocates in the housing due to the applied external moving force. As the inertial mass decouples from one transducer on its way to magnetically connecting to the other transducer, the decoupled suspended magnetic element oscillates at a frequency greater than the imparting force, thereby generating electrical power.
    Type: Application
    Filed: June 18, 2010
    Publication date: June 16, 2011
    Inventors: Tzeno Galchev, Hanseup Kim, Khalil Najafi
  • Patent number: 7960876
    Abstract: A magnet rotor includes a drive arm with a rotary shaft, and an anisotropic permanent magnet having an axis of magnetization. The drive arm is composed of a light transmitting resin. The magnet has a cylindrical shape with a hollow center portion through which the rotary shaft is disposed. The drive arm and the permanent magnet are bonded together by a light curable resin adhesive.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: June 14, 2011
    Assignee: Nisca Corporation
    Inventors: Keijirou Amino, Akira Hakozaki, Katsura Nakajima
  • Patent number: 7960883
    Abstract: A motor assembly with coaxial shafts is provided which can be produced at low costs and in which a plurality of motors can be disposed with their respective rotary shafts arranged coaxially to one another with high coupling and assembling accuracy in a simple structure. Each motor includes a housing member and ball bearings to rotatably support the rotary shaft and two adjacent motors are fixedly coupled together such that the respective housing members of the adjacent motors are fitted with each other.
    Type: Grant
    Filed: January 6, 2010
    Date of Patent: June 14, 2011
    Assignee: Minebea Motor Manufacturing Corporation
    Inventors: Hideo Hishida, Shinya Igarashi
  • Patent number: 7859142
    Abstract: The aim of the invention is to provide a robust, simple woodworking machine. To achieve this, the invention provides a machine comprising at least one linear direct drive, which contains a primary part (3, 3a, 3b, 4, 4a, 4b) with a first element (9, 10, 12, 14) for generating a first magnetic field and at least one additional element (17, 18, 20, 27, 28, 29, 30) for generating an additional magnetic field. The first element (9) for generating the first magnetic field is positioned, in particular, in such a way in relation to the additional element (17, 18, 20, 27, 28, 29, 30) for generating the additional magnetic field that the first magnetic field overlaps the additional magnetic field. The machine also comprises a secondary part (5, 6, 6a, 6b), which comprises magnetic return elements and is devoid of magnetic sources.
    Type: Grant
    Filed: February 7, 2006
    Date of Patent: December 28, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hans Ulrich Armeit, Ralph Burgstahler, Zeljko Jajtic, Markus Knorr, Andreas Rust, Stefan Schiele, Hartmut Schirdewahn, Roland Schultheiss
  • Patent number: 7855477
    Abstract: There is provided an apparatus for preventing displacement of a retainer in a rolling guide by making use of the property of the retainer of moving half the distance of a moving object, such as a table.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: December 21, 2010
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventor: Takanobu Akiyama
  • Patent number: 7642678
    Abstract: The present invention provides a linear motor 1 which uses a plurality of cylindrical linear motors 2 to increase power and which can guide forward and backward movements using a simple configuration, the linear motor 1 requiring reduced manufacturing costs. A plurality of cylindrical linear motors 2 are provided each of which has a shaft member 3 made of a permanent magnet and a coil unit 4. A motor support 25 is provided which is able to support the coil units of the plurality of cylindrical linear motors 2 arranged in parallel. The shaft members of the plurality of cylindrical linear motors 2 are coupled together at ends thereof by coupling members 10, 11. A guide mechanism 32 is located inside the arrangement of the cylindrical linear motors 2 to guide movement of the shaft members 3 of the cylindrical linear motors 2. The number of guide mechanisms 32 is smaller than that of the cylindrical linear motors 2. For example, the single guide mechanism 32 is provided.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: January 5, 2010
    Assignee: Murata Kikai Kabushiki Kaisha
    Inventor: Takuya Okada
  • Patent number: 7440689
    Abstract: An electromagnetically actuated adjusting apparatus for lens is disclosed. The adjusting apparatus comprises a body capable of furnishing a lens inside, at least one permanent magnet, a first magnetic conductor and a second magnetic conductor. The first and the second magnetic conductors are respectively wound with a plurality of coils. The permanent magnet is adjoined to the body and has a first polarity and a second polarity opposing each other. The first magnetic conductor has at least a first extension member provided opposite to the first polarity. The second magnetic conductor has at least a second extension member provided opposite to the second polarity. The first extension member and the second extension member can better converge magnetic flux lines emanating from the coils when charged to the positions nearing the two polarities of the permanent magnet so high-efficiency focusing and zooming of lens can be achieved.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: October 21, 2008
    Assignee: Aiptek International Inc.
    Inventors: Kuo Tung Tiao, Shih Yuan Chang, Ming Jen Tsai
  • Patent number: 7239052
    Abstract: A magnetic actuator. A yoke includes a first opening and a second opening, a frame, and a path. A first magnet is disposed in the first opening in the vicinity of the frame. A second magnet is disposed in the second opening in the vicinity of the frame. A coil comprises a wire surrounding the path. A light shield is connected to an end of the coil. A guiding element disposed outside the path is connected to an end of the coil. When current passes through the coil, the coil moves along the path by magnetic induction between the first magnet and the second magnet such that the iris diaphragm is adjustable by the light shield. When there is no current through the coil, dynamic force produced by the guiding element returns the light shield to its original position.
    Type: Grant
    Filed: August 2, 2005
    Date of Patent: July 3, 2007
    Assignee: Delta Electronics, Inc.
    Inventors: Chii-How Chang, Sean Chang
  • Patent number: 7170665
    Abstract: An optical unit is constructed by superposing and cementing the first substrate having fixed electrodes and the second substrate having a sheet-like member in which a moving plate-spring-like electrode is provided. Concentric through holes are provide at the middles of the sheet-like member of the first substrate and the second substrate, and an optical element, such as a lens, a mirror, or a prism, is mounted to the through hole of the sheet-like member. When voltages applied between the fixed electrodes and the moving electrode are controlled, the sheet-like member is displaced and thereby the optical element is deformed.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: January 30, 2007
    Assignee: Olympus Corporation
    Inventors: Shinji Kaneko, Kimihiko Nishioka, Takeshi Nakane, Toshihiro Nakao
  • Patent number: 6987601
    Abstract: Device and method for a damping function to reduce undesirable mechanical transient responses to control signals. In one aspect of the present invention, the damping function may be used to reduce overshoot and oscillation when a digital micromirror is driven from a landing plate to the flat or neutral position. In another aspect of the present invention, the damping function may be used to reduce transient resonance of a digital micromirror when the micromirror is driven to a landing plate.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: January 17, 2006
    Assignee: Texas Instruments Incorporated
    Inventor: Toshiyuki Kaeriyama
  • Patent number: 6780161
    Abstract: The present invention relates to an apparatus for treating a living body or tissue with shock waves originating from at least two sources to a focal area on or within said living body or tissue. The apparatus is particularly for treating an illness or fragmenting stones or concretions. The sources of shock waves are at different angles from one another. An objective of the invention is to induce a localized effective shock wave treatment area and at the same time to minimize or abolish the unwanted tissue damage effects outside the treatment area.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: August 24, 2004
    Assignee: FMD, LLC
    Inventors: Yousry Faragalla, Alaa M. Elsheikh, Wadie G. Shehata
  • Patent number: 6570275
    Abstract: A motor having two degrees of free motion includes: a motor casing; a combined core of cylindrical shape having a plurality of inner teeth inside and a plurality of outer teeth outside and fixedly coupled inside the motor casing; a first coil winding wound on the inner teeth of the combined core; a second coil winding coil wound on the outer teeth of the combined core; a rotating armature having a permanent magnet inside inserted inside the combined core and rotated by an interaction of a magnetic flux formed by the first coil winding and the permanent magnet; a linear armature located at one side of the second coil winding undergoing a linear movement by the flux formed by the second coil winding; a driving shaft penetratingly coupled to the rotating armature and to the linear armature and undergoing rotating and linear movements therewith; and a spring urging the linear armature away from the combined core.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: May 27, 2003
    Assignee: LG Electronics Inc.
    Inventors: Tae Heoung Kim, Jin Soo Park
  • Patent number: 6538799
    Abstract: A torsional micro-mechanical mirror system includes a mirror assembly rotatably supported by a torsional mirror support assembly for rotational movement over and within a cavity in a base. The cavity is sized sufficiently to allow unimpeded rotation of the mirror assembly. The mirror assembly includes a support structure for supporting a reflective layer. The support structure is coplanar with and formed from the same wafer as the base. The torsional mirror support assembly includes at least one torsion spring formed of an electroplated metal. An actuator assembly is operative to apply a driving force to torsionally drive the torsional mirror support assembly, whereby torsional motion of the torsional mirror support assembly causes rotational motion of the mirror assembly. In another embodiment, a magnetic actuator assembly is provided to drive the mirror assembly.
    Type: Grant
    Filed: January 3, 2001
    Date of Patent: March 25, 2003
    Assignees: The Microoptical Corporation, Northeastern University
    Inventors: Robert William McClelland, Noa More Rensing, Mark Bradley Spitzer, Paul Daniel Aquilino, Paul Martin Zavracky
  • Patent number: 6249064
    Abstract: Apparatus and method for providing microactuator positional control in a disc drive having a rotatable disc on which a plurality of tracks are defined and an actuator assembly which supports a head adjacent the tracks. An actuator motor is used to provide primary positioning of the head through the controlled application of current to a coil of the actuator motor. A microactuator, opposite the actuator motor coil, has a pair of microactuator coils wound about respective magneto-striction beams so that, in response to drive currents passed through the microactuator coils, a selected one of the magneto-striction beams increases in length and the remaining magneto-striction beam decreases in length. The magneto-striction beams act upon a pivot assembly coupled to the head to displace the head to a final desired position adjacent the disc.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: June 19, 2001
    Assignee: Seagate Technology LLC
    Inventor: Robert T. Bradbury
  • Patent number: 6066998
    Abstract: An actuator made up of a plurality of actuator elements is provided which actuator provides long travel in one dimension and short travel in five additional dimensions, with each actuator element providing long travel in the one dimension and short travel in at least two additional dimensions. For preferred embodiments, each actuator element includes a suspension core, the long travel being in one linear dimension and each actuator element providing short travel in two additional linear dimensions and at least one rotary dimension.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: May 23, 2000
    Assignee: Massachusetts Institute of Technology
    Inventors: David L. Trumper, Lawrence S. Schwartz
  • Patent number: 5802415
    Abstract: A dual coil actuator comprising a pair of independently moveable electrically conductive coils, is characterized in that a single magnet core generates a single magnetic field, and the coils are positioned around the single magnet core, spaced from each other and from the core, and are supported to be independently moved in the single magnetic field about the single magnet core.
    Type: Grant
    Filed: April 7, 1997
    Date of Patent: September 1, 1998
    Assignee: Eastman Kodak Company
    Inventors: Robert C. Bryant, Michael J. O'Brien, Edward P. Furlani
  • Patent number: 5362213
    Abstract: A micro-pump having a cross-sectional area of not more than 5 mm.sup.2 and usable as a drive source for the operation of a micro-machine and as the controlled flow of a fluid and a method for the production of this micro-pump are provided. The micro-pump is characterized by comprising a comb-shaped stationary electrodes, a fluid chamber, a piston formed in the fluid chamber, comb-shaped movable electrodes formed integrally with the piston, a conductive film for imparting a grounding potential to the piston and the comb-shaped movable electrodes, and check valves and consequently having a drive source integrally formed therein.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: November 8, 1994
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Kiyoshi Komatsu, Takeshi Kudo, Takashi Kitamura, Ryo Tsukamoto
  • Patent number: 5340400
    Abstract: Surface treating apparatus employing at least two linear motors driving a multiple linkage system for positioning the outlet of treatment apparatus such as a radiation head or a sprayer for coating objects and especially large objects. A combination of different motions such as linear, rotational and a combination thereof are achieved through varying relative speeds and/or selective movements of the linear motors used to drive the multiple linkage system. Treatment of the entire surface area of the item being treated is accomplished through with the number of reduced number of components of simplified design. One dimensional and two dimensional linear motors may be employed in the system. A second embodiment has a plurality of spray assemblies. Each assembly has a single arm and linear motor which moves along two perpendicular axes.
    Type: Grant
    Filed: February 4, 1993
    Date of Patent: August 23, 1994
    Assignee: Megamation Incorporated
    Inventors: Thomas D. Schmidt, Peter Smit
  • Patent number: 5283682
    Abstract: A reactionless scanning and positioning system is disclosed which includes a mirror scanning assembly coupled to a reaction mass having a rotational moment of inertia equal and opposite to that of the mirror assembly, so that the system is effectively reactionless. The overall mechanical design of the scanning system is optimized to require minimum power consumption by the actuators used to drive the scanning assembly. The scanning assembly is mounted on flexible pivots having a torsional stiffness which provides a mechanically resonant frequency such that a minimum amount of power is required to angularly position the mirror. A position encoder disc is used in both coarse positioning mode and in a relatively fast scanning mode to determine the position of the mirror. In the present invention, the position of the mirror is accurately determinable in a fast scanning mode due to the novel mounting of the mirror with respect to the position encoder disc.
    Type: Grant
    Filed: October 6, 1992
    Date of Patent: February 1, 1994
    Assignee: Ball Corporation
    Inventor: Miroslaw A. Ostaszewski
  • Patent number: 5235225
    Abstract: Miniaturized linear electrostatic motor comprising a plurality of parallel stators and a flexible rotor disposed between adjacent stators. The stators may be fabricated by depositing a plurality of conductive electrodes on each facing surface of the stator or the electrodes may alternatively be placed on the flexible rotor element. The electrodes are selectively energized by a commutating circuit in a manner to effect movement of the rotor relative to the stator in a perpendicular to parallel motion. The electrostatic motor is particularly suitable for fabrication using photo-lithographic techniques and the formation of multi-layered, concatenated motor structures.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: August 10, 1993
    Assignee: Northwestern University
    Inventors: James E. Colgate, Mark E. Axland
  • Patent number: 5208498
    Abstract: A linear actuator comprises a shaft made of non-magnetic material for being reciprocatingly moved in an axial direction of the shaft, a plurality of ring-shaped moving cores which are located on the shaft and arranged in the axial direction thereof, and each of which is made of magnetic material, a first spacer made of non-magnetic material and interposed between two adjacent moving cores, a plurality of ring-shaped permanent magnets each of which is disposed on one of the respective ring-shaped moving cores and each of which includes a plurality of magnets arranged in the circumferential direction in such a manner that adjacent magnets are different in polarity, and a stationary core located around each of the permanent magnets with a clearance. The stationary core is formed with an outer ring portion formed, magnetic poles which face the permanent magnets, and legs which connect the outer ring portion and the magnetic poles. Coils are wound around the legs.
    Type: Grant
    Filed: September 27, 1991
    Date of Patent: May 4, 1993
    Assignee: Aisien Seiki Kabushiki Kaisha
    Inventor: Takanori Hamajima
  • Patent number: 5070263
    Abstract: A torque motor for rotatably driving a rate sensor (10, 100) which includes a permanent magnet (30) that is magnetically coupled to an upper rotor (18, 106) and a lower rotor (44, 110). At three sites, the upper rotor includes an upper tab (60), which is centered between two electromagnetic coils (56, 58). Similarly, at each site, the lower rotor includes two lower tabs (62) that extend adjacent opposite faces of the electromagnetic coils. With no electrical current flowing through the electromagnetic coils, flexures (46) that connect the upper and lower rotors to a base (12) provide a spring bias force sufficient to maintain the upper tab centered in a slot (66) and thus, equidistant between each of the two lower tabs. As the electric current flows through the electromagnetic coils, distribution of the magnetic flux produced by the permanent magnet changes so that the upper tab is attracted toward one of the electromagnetic coils and repelled from the other.
    Type: Grant
    Filed: February 8, 1991
    Date of Patent: December 3, 1991
    Assignee: Sundstrad Data Control, Inc.
    Inventor: Rand H. Hulsing, II
  • Patent number: 5023496
    Abstract: A linear motor comprises a first yoke, a second yoke spaced apart the width of a first gap from the first yoke, a current-carrying coil surrounding at least one of the first yoke and the second yoke, a magnet spaced apart the width of a second gap from the first and second yokes, and the end portion of the magnet extending over the first gap from one of the first yoke and the second yoke to the other thereof, when the magnet is in a starting position or in an initial position, whereby a relative movement between the magnet and the first and second yokes are obtained.
    Type: Grant
    Filed: August 21, 1989
    Date of Patent: June 11, 1991
    Assignee: Sony Corporation
    Inventor: Hideo Niikura
  • Patent number: 4814650
    Abstract: An electrodynamic motor having a flat plunger core arrangement formed out of alternating layers of magnetic and insulating strips clamped together and maintained on respective bearing sleeves which reciprocate on guide members with the gap between stator members.
    Type: Grant
    Filed: March 10, 1987
    Date of Patent: March 21, 1989
    Assignee: Mechanical Technology Incorporated
    Inventors: Peter W. Curwen, Ralph Hurst
  • Patent number: 4803388
    Abstract: A linear motor comprises a first yoke, a second yoke spaced apart the width of a first gap from the first yoke, a current-carrying coil surrounding at least one of the first yoke and the second yoke, a magnet spaced apart the width of a second gap from the first and second yokes, and the end portion of the magnet extending over the first gap from one of the first yoke and the second yoke to the other thereof, when the magnet is in a starting position or in an initial position, whereby a relative movement between the magnet and the first and second yokes are obtained.
    Type: Grant
    Filed: October 14, 1986
    Date of Patent: February 7, 1989
    Assignee: Sony Corporation
    Inventor: Hideo Nikura
  • Patent number: 4743178
    Abstract: A non-linear, electromagnetic, vibration compression mechanism comprising a non-linear electromagnetic vibration device and a piston-cylinder, plunger-cylinder, or membrance type pump. A reciprocating compression section of the device may be axially arranged at a front or rear portion of the electromagnetic vibration device to form a coaxial compression device. Compression elements may also be installed on the lateral right and left sides or top and bottom of the electromagnetic vibrator to act non-coaxially but in parallel with the vibrator. The electromagnetic vibrator may drive one compression cylinder or several cylinders simultaneously. The reciprocating fluid compression device of the instant invention may be used to compress gas as well as liquid.
    Type: Grant
    Filed: March 12, 1986
    Date of Patent: May 10, 1988
    Inventor: Cao P. Sheng
  • Patent number: 4621221
    Abstract: A reversible vibratory motor includes a driving member responsive to a first frequency of vibration for driving a driven member in a first direction, and responsive to a second frequency of vibration for driving the driven member in the opposite direction.
    Type: Grant
    Filed: June 26, 1985
    Date of Patent: November 4, 1986
    Assignee: Eastman Kodak Company
    Inventor: James K. Lee
  • Patent number: 4565497
    Abstract: An actuator is described for use in a pump having a pump chamber whose contents are expelled by movement of a pair of pusher plates toward one another. The actuator includes opposed solenoid armatures which are operable for movement between open and closed positions. The armatures are each operatively connected to an associated pusher plate by a main spring which is attached at one end to the back end of the armature, extends through a front-to-back slot in an armature core, and is connected at its opposite end to the pusher plate. A pair of preload springs carried on each armature and disposed on either side of the associated main spring acts to hold the main spring in a prestressed condition prior to solenoid actuation.
    Type: Grant
    Filed: December 11, 1984
    Date of Patent: January 21, 1986
    Assignee: Novacor Medical Corporation
    Inventors: Phillip J. Miller, Jal S. Jassawalla
  • Patent number: 4528468
    Abstract: A digital linear actuator capable of converting pulsed electrical current into positive and precise increments of linear motion. The actuator includes a threaded shaft which is prevented from rotating, a cylindrical rotor threaded on the shaft, and drive means spaced from the rotor and operative in response to a pulse of electric current to engage the rotor and turn the rotor through a predetermined arc, thereby causing linear motion by either the rotor or the shaft in the direction of the longitudinal axis of the shaft. Preferably the rotor circumference is toothed, and the drive means include an electromagnet which, when energized by a pulse of current, causes movement of a pivoted finger; when the finger moves, a flexible reed attached at one end thereof engages one of the rotor teeth and causes rotation of the rotor.
    Type: Grant
    Filed: December 27, 1983
    Date of Patent: July 9, 1985
    Inventor: Charles W. Leubecker
  • Patent number: 4500265
    Abstract: A vibration free fluid compressor particularly adapted for Stirling cycle cryogenic refrigeration apparatus comprising a pair of identical opposing ferromagnetic pistons (10, 12) located in a housing (22) and between a gas spring including a sealed volume (52, 54, 60) of a working fluid such as gas under pressure. The gas compresses and expands in accordance with movement of the pistons (10, 12) to generate a compression wave which can be vented out to other apparatus, for example, a displacer unit in a Stirling cycle engine. The pistons (10, 12) are urged outwardly due to the pressure of the gas; however, a fixed electromagnetic coil assembly (56), located in the housing adjacent the pistons, is periodically energized to produce a magnetic field which interlinks the pistons (10, 12) in such a fashion that the pistons are mutually attracted to one another.
    Type: Grant
    Filed: January 28, 1983
    Date of Patent: February 19, 1985
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Jack Evans, Philip A. Studer
  • Patent number: 4494023
    Abstract: A magnetic motor machine is provided in a compact housing and comprises a pair of electromagnetics rigidly attached within said housing in spaced apart relationship. Electronic circuits and power supplies are provided for each of said electromagnetics. The electronic circuits and power supplies have turn-on switches as well as a micro switch which, upon activation of same, alternatively makes and breaks the circuits for each of the electromagnetics. A yoke is positioned between the electromagnetics by a support shaft which is mounted on a bearing for movement thereabout.
    Type: Grant
    Filed: November 28, 1983
    Date of Patent: January 15, 1985
    Inventor: Raymond Cook
  • Patent number: 4457673
    Abstract: A pump is described in which a flexible enclosure defines a pump chamber whose contents are expelled by movement of a pusher plate engaged with the enclosure. The pusher plate is moved by an elongate beam spring interconnecting the pusher plate with a solenoid drive mechanism. Solenoid actuation causes flexing of the beam spring from a relatively less stressed to a relatively more stressed position, the increased stress in the spring being relieved by pusher element movement. A preferred embodiment of the invention includes a symmetrical arrangement of opposed pusher elements and associated beam springs.
    Type: Grant
    Filed: December 3, 1982
    Date of Patent: July 3, 1984
    Assignee: Novacor Medical Corporation
    Inventors: Michael G. Conley, James S. Petrek
  • Patent number: 4384829
    Abstract: A pump is described in which a flexible enclosure defines a pump chamber and in which the contents of the pump chamber are expelled by movement of a pair of opposed pusher elements engaged with the enclosure. The pusher elements are displaced by at least one pair of beam springs, each of which is pivotally supported at one end and is engaged with one of the pusher elements at the other end. The ends of the beam springs opposite the pusher elements are pivoted by actuation of symmetrical solenoid armatures, causing each of the springs to be stressed. Relief of the spring stress forces the pusher elements toward each other. De-energization of the solenoid armatures permits the beam springs to pivot back to the original position upon filling of the pump chamber.
    Type: Grant
    Filed: November 28, 1980
    Date of Patent: May 24, 1983
    Assignee: Andros Incorporated
    Inventors: Michael G. Conley, James S. Petrek
  • Patent number: 4160177
    Abstract: A vibratory electromagnetic motor includes a stator unit, a first rotatable armature and a second rotatable armature. The armatures and the stator unit are arranged to reduce motor noise and vibrations when the armatures synchronously rotate in opposite directions in response to a magnetic force. A resilient coupling member is connected between the armatures for combining drive power generated by the first rotating armature with drive power generated by the second rotating armature.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: July 3, 1979
    Assignee: The Gillette Company
    Inventor: Enzo Ascoli
  • Patent number: 3961209
    Abstract: This invention concerns an oscillator for time measurement, comprising a resonator the oscillation of which is maintained by at least one part reciprocated by electrostatic forces relative to at least one electrode connected to a direct voltage source, said part being periodically charged by contact with the electrode, or electrodes comprising an elastically deformable contact making member whose elastic deformation energy is much less when in contact with an electrode than the motional energy of the resonator.
    Type: Grant
    Filed: October 24, 1974
    Date of Patent: June 1, 1976
    Assignee: Biviator S.A.
    Inventors: Karl Adler, Georges Ducommun, Charles A. Wantz