Magnetostrictive-type Device Patents (Class 335/215)
  • Patent number: 9385018
    Abstract: A semiconductor manufacturing equipment comprising trace elements and method of manufacture are disclosed. The semiconductor manufacturing equipment includes one or more components, wherein at least one component is made from an alloy comprising one or more materials and one or more rare earth elements (REEs). The alloy comprises predetermined quantities of the respective REEs. The method for manufacturing a component includes forming an alloy comprising at least one material and one or more selected rare earth elements (REEs) and building the component with the alloy.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: July 5, 2016
    Assignee: Samsung Austin Semiconductor, L.P.
    Inventors: Dennis Winters, Victor Coots, Matthew Burnham, Daniel Thevis
  • Patent number: 9117578
    Abstract: An HTS magnet having a stack of a plurality of double-pancake (DP) coils is disclosed, with each DP coil having a first superconducting coil and a second superconducting coil. The plurality of DP coils have varying widths, with DP coils with the widest widths at the top and bottom of the stack, and DP coils with the narrowest coils located substantially at a midpoint of the stack. The DP coils omit turn-to-turn insulation, or have minimal turn-to-turn insulation.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: August 25, 2015
    Assignee: Massachusetts Institute of Technology
    Inventors: Seung-Yong Hahn, Yukikazu Iwasa, Juan Bascunan, Dong Keun Park
  • Patent number: 8786389
    Abstract: A resonant energy conversion apparatus may utilize magnetostrictive properties of a toroidal magnet. Electrical current induces periodic, complementary magnetic fields around separate quadrants of a toroidal magnet. The periodic, complementary magnetic fields induce mechanical changes in the toroidal magnet due to magnetostriction, causing mechanical stress in the toroidal magnet. Energy is stored as mechanical stress, and later released as electrical current.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: July 22, 2014
    Assignee: Rockwell Collins, Inc.
    Inventor: David W. Cripe
  • Patent number: 8416972
    Abstract: A hermetically sealed actuator design for absorbing and reducing the effect of sound or vibration energy from a vibrating surface. The device comprises a body (1) containing a magnetostrictive core (2-6) a reaction mass (7) for energizing the actuator by compression, and a bearing or lever system to control the movement of the reaction mass. The actuator has a foot (11) for receiving the vibration from the structure into the device and a sensor (13) for monitoring vibration levels. The device can also function as an audio transmitter whereby it vibrates the surface onto which it is mounted and can be used for audio trans-10 mission through the structure or noise and vibration reduction by driving the surface out of phase with the vibration received from the structure.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: April 9, 2013
    Assignee: FeONIC PLC
    Inventors: Martin Geoffrey Aston, Kamlesh Prajapati, Neil Munns, Christopher Tiler
  • Patent number: 8384501
    Abstract: An electromagnetic actuator (1) with an armature (3) mounted so that the armature can be moved by virtue of a bearing arrangement (6A, 6B) and an electric coil (4) is provided for moving the armature (3). A magnetostrictive element (8) is provided, by which relative movement between the armature (3) and at least part of the bearing arrangement (6A, 6B) is produced.
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: February 26, 2013
    Assignee: ZF Friedrichshafen AG
    Inventor: Michael Pantke
  • Patent number: 8237525
    Abstract: Conventional devices have a valve needle and a shape memory element which, by the application of a controllable magnetic field, executes a control stroke travel that operates the actuator, and having a coil that excites the magnetic field which is situated in a magnet housing which, at its end face, is bordered with respect to an actuating axis by a front wall in each case, the front walls having a through opening radially within the coil. It is a disadvantage that the magnetic field excited around the coil is conducted unfavorably, so that at most a slight magnetic field develops in the shape memory element. The shape memory element has a magnetic field flowing through it, in the direction of its longitudinal extension, if at all. Since the shape memory element has a high magnetic resistance and is developed to be very long in the axial direction, only a very weak magnetic field can be induced in the shape memory element.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: August 7, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Anh-Tuan Hoang, Martin Maier, Guenther Hohl
  • Patent number: 8154367
    Abstract: Regarding a switch used for various controls of a motor vehicle in particular and a switch device using the switch, it becomes possible to simplify the configuration and to perform reliable detection of trouble. A first detector is disposed on a surface opposing to a magnet fitted to an actuator, and a second detector is disposed thereunder. A controller detects magnetism of the magnet by using the first detector and the second detector. In case one of the detectors is out of order, it can also be detected from ON/OFF signal from the first detector and the second detector.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: April 10, 2012
    Assignee: Panasonic Corporation
    Inventors: Hisashi Nishikawa, Naoki Yoshikawa
  • Patent number: 8134432
    Abstract: Provided is a system and method for enabling pressure or acoustic waves to induce magnetostrictive volume or shape change, providing greater control over magnetopropants. A coating material and the spacing between a magnetopropant and a magnetic particle are selected such that a certain pressure causes change in the relative distance of magnetopropant and magnetic particle, thereby changing the amount of magnetostriction. The coating material, magnetopropant, and magnetic particle are assembled to form a pressure sensitive magnetopropant. Given this structure, changes in pressure will cause a fluctuation of the amount of magnetostriction. In a pore space environment, this causes a change in pore space with resulting change in permeability and, hence, changes in fluid flow.
    Type: Grant
    Filed: February 21, 2011
    Date of Patent: March 13, 2012
    Inventor: Charles Saron Knobloch
  • Patent number: 8079568
    Abstract: A valve is described having an inlet, an outlet, a sealing element and a device to generate a magnetic field, whereby the sealing element can be moved at least partially by the device and whereby the sealing element connects the inlet to the outlet in a fluid-conducting manner in that the sealing element lifts off at least partially from a valve seat wherein the sealing element is made at least partially of a foam element that can be deformed by the magnetic field.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: December 20, 2011
    Assignee: Carl Freudenberg KG
    Inventors: Ralf Heinrich, Torsten Gerlich, Christoph Gund, Klaus Bickel
  • Publication number: 20110148553
    Abstract: An electromagnetic actuator (1) with an armature (3) mounted so that the armature can be moved by virtue of a bearing arrangement (6A, 6B) and an electric coil (4) is provided for moving the armature (3). A magnetostrictive element (8) is provided, by which relative movement between the armature (3) and at least part of the bearing arrangement (6A, 6B) is produced.
    Type: Application
    Filed: November 5, 2010
    Publication date: June 23, 2011
    Applicant: ZF FRIEDRICHSHAFEN AG
    Inventor: Michael PANTKE
  • Publication number: 20110140816
    Abstract: Provided is a system and method for enabling pressure or acoustic waves to induce magnetostrictive volume or shape change, providing greater control over magnetopropants. A coating material and the spacing between a magnetopropant and a magnetic particle are selected such that a certain pressure causes change in the relative distance of magnetopropant and magnetic particle, thereby changing the amount of magnetostriction. The coating material, magnetopropant, and magnetic particle are assembled to form a pressure sensitive magnetopropant. Given this structure, changes in pressure will cause a fluctuation of the amount of magnetostriction. In a pore space environment, this causes a change in pore space with resulting change in permeability and, hence, changes in fluid flow.
    Type: Application
    Filed: February 21, 2011
    Publication date: June 16, 2011
    Inventor: Charles Saron Knobloch
  • Publication number: 20110140815
    Abstract: Embodiments of a magnetostrictive device, a dental lighting system, a method of illuminating a lighting apparatus and a lighting apparatus are disclosed. The embodiments may include a lighting apparatus with a light source, an electrical power storage device and a switch. When the switch detects a magnetic field, the switch may complete an electrical connection between the electrical power storage device and the switch, thus illuminating the light source. The magnetic field may be magnetostrictively or non-magnetostrictively generated, and maybe be produced by a receptacle, a hand-piece or the lighting apparatus itself. A user may switch the light source on and off. In a magnetostrictive device, the light may be illuminated even when a tip is not activated, and the electrical power storage device may be inductively re-charged. The lighting apparatus may be included in an insert of a magnetostrictive device, such as a magnetostrictive ultrasonic hand-held dental device.
    Type: Application
    Filed: December 11, 2009
    Publication date: June 16, 2011
    Applicant: HU-FRIEDY MFG. CO., INC.
    Inventor: Mohammad A. Jamnia
  • Patent number: 7893801
    Abstract: Provided is a system and method for enabling pressure or acoustic waves to induce magnetostrictive volume or shape change, providing greater control over magnetopropants. A coating material and the spacing between a magnetopropant and a magnetic particle are selected such that a certain pressure causes change in the relative distance of magnetopropant and magnetic particle, thereby changing the amount of magnetostriction. The coating material, magnetopropant, and magnetic particle are assembled to form a pressure sensitive magnetopropant. Given this structure, changes in pressure will cause a fluctuation of the amount of magnetostriction. In a pore space environment, this causes a change in pore space with resulting change in permeability and, hence, changes in fluid flow.
    Type: Grant
    Filed: May 2, 2006
    Date of Patent: February 22, 2011
    Inventor: Charles Saron Knobloch
  • Patent number: 7880573
    Abstract: A method for reducing a temperature rise of a magnetic material is provided. The method includes applying force to the magnetic material to reduce a dimensional change of the magnetic material during a first part of an operation cycle, such as due to magnetostriction. The force is removed from the magnetic material during a second part of an operation cycle, allowing magnetostrictive dimensional changes to occur.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: February 1, 2011
    Assignee: iGo, Inc.
    Inventors: Bryan Wayne McCoy, Jason Walter Swanson
  • Publication number: 20110019312
    Abstract: A magneto-resistance effect element, a magneto-resistance effect head, a magnetic storage and a magnetic memory, in which noise caused by a spin-transfer torque is reduced, are provided. In a fixed magnetization layer or a free magnetization layer of a magneto-resistance effect element including the fixed magnetization layer, a spacer layer and the free magnetization layer; a layer containing one element selected from the group consisting of Ti, Zr, Nb, Mo, Ru, Rh, Pd, Ag, La, Hf, Ta, W, Re, Os, Ir, Pt and Au is disposed.
    Type: Application
    Filed: September 10, 2010
    Publication date: January 27, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hideaki FUKUZAWA, Masahiro Takashita, Hiromi Yuasa, Yoshihiko Fuji, Hitoshi Iwasaki
  • Publication number: 20100321009
    Abstract: A magnetostrictive transducer that generates a large shear horizontal (SH) wave useful for non-destructive testing of a plate member, and method and apparatus for structural health monitoring by using the magnetostrictive transducer. The magnetostrictive transducer includes: a magnetostrictive patch array comprising a plurality of magnetostrictive patches that have different radii of curvature, and have the same center of curvature when arranged on a plate member and form an overall fan-shape; a static magnetic field forming unit comprising two magnets that are respectively installed on both sides of the magnetostrictive patch so that a magnetic field is formed in parallel to an arc direction of the magnetostrictive patch; and a dynamic magnetic field forming unit comprising a wound coil comprising a plurality of curved portions.
    Type: Application
    Filed: June 16, 2010
    Publication date: December 23, 2010
    Applicant: SNU R&DB FOUNDATION
    Inventors: Ju Seung Lee, Min Kyung Lee, Heung Son Lee, Yoon Young Kim
  • Publication number: 20100259252
    Abstract: A segmented magnetostrictive patch array transducer capable of generating a high frequency shear wave in a structure such as a rod or a pipe, a structural fault diagnosing apparatus including the segmented magnetostrictive patch array transducer, and a method of operating the segmented magnetostrictive patch array transducer are shown. The segmented magnetostrictive patch array transducer includes a plurality of magnetostrictive patches attached along a circumference of a rod member; a plurality of insulators that are disposed on the magnetostrictive patches; a plurality of meander coils, each of the meander coils comprising a plurality of coil lines extending along the circumference direction of the rod member on each of the insulators, wherein a current flows through adjacent coil lines in opposite directions to one another; and a plurality of magnets that respectively form a magnetic field along the circumferential direction of the rod member on the magnetostrictive patches.
    Type: Application
    Filed: December 17, 2009
    Publication date: October 14, 2010
    Applicant: SNU R&DB FOUNDATION
    Inventors: Hoe Woong KIM, Young Eui KWON, Yoon Young KIM
  • Publication number: 20100141248
    Abstract: An electronic device is provided with a magnetostriction apparatus and a main body. The magnetostriction apparatus includes a super magnetostrictor which extracts and contracts in accordance with a magnetic field, a coil and bias magnets which generate the magnetic field, and a housing which maintains the components at predetermined positions. The magnetostriction apparatus is fitted to the main body such that the super magnetostrictor is perpendicular to the face of the main body where the apparatus is fitted. The housing is connected to the main body so that a predetermined pressure is applied to the super magnetostrictor by the main body and the housing.
    Type: Application
    Filed: September 1, 2006
    Publication date: June 10, 2010
    Inventor: Motoaki Suzukawa
  • Publication number: 20100115671
    Abstract: We disclose a precision positioner based on an inertial actuator, an optical instrument for accurate positional readout and control, and an electrostatically clamped assembly for holding any instrument or device. All aspects of the present invention present a significant improvement over the prior art: a positioner is robust and compact; an optical instrument for positional control is a profoundly simple and compact module; a clamping assembly is self-aligning and suitable for robotic hot-swapping of objects being positioned.
    Type: Application
    Filed: November 4, 2008
    Publication date: May 6, 2010
    Inventors: Sergiy Pryadkin, Dmitri Simonian
  • Patent number: 7688168
    Abstract: Linear actuators (also known as an inchworm actuator) including a magnetically actuatable shape memory alloy (SMA) are described. The linear actuators include a bar and an actuator assembly, configured to achieve a linear displacement of the actuator assembly relative to the bar. A hybrid magnetic trigger including an electromagnet and a permanent magnet is used to selectively attract the magnetically actuatable SMA toward the magnetic trigger. The motion of the magnetically actuatable SMA can be converted to a linear displacement. The magnetically actuatable SMA can be implemented using a SMA exhibiting both ferromagnetic and SMA properties, or by a ferromagnetic mass coupled with an SMA (i.e., a ferromagnetic SMA composite). Linear actuators including bars incorporating a ratchet mechanism, and featureless bars are described. A hydraulic system incorporating actuators including magnetically actuatable SMA membranes is also disclosed.
    Type: Grant
    Filed: September 8, 2005
    Date of Patent: March 30, 2010
    Assignee: University of Washington
    Inventors: Minoru Taya, Victor Cheng, Harry Sugandi, Yuanchang Liang, Hsiuhung Chen, Chi-Yuan Wang
  • Patent number: 7667600
    Abstract: A security device, according to various aspects of the present invention, detects removal of the device from a provided surface. The security device includes a body; at least one magnet coupled to the body; and a sensor coupled to the body proximate to at least one of the at least one magnet. The sensor does not move with respect to the at least one magnet. The at least one magnet magnetically couples the body to the surface. Each one magnet provides a magnetic flux. When the body couples to the surface, at least a portion of the magnetic flux conducts away from the sensor. When the body is not coupled to the surface, at least a portion of the magnetic flux from at least one magnet of the at least one magnet conducts through the sensor thereby indicating removal of the body from the surface.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: February 23, 2010
    Assignee: Roc2Loc, Inc.
    Inventors: Brian Woodbury, John Spenik, Roc Lastinger
  • Patent number: 7598835
    Abstract: The present invention aims to provide a magnetic sensor provided with a magnetoresistive effect element capable of stably maintaining a direction of magnetization in a magnetic domain of a free layer. The magnetic sensor includes a magnetoresistive effect element provided with narrow zonal portions 11a . . . 11a including a pinned layer and a free layer. Disposed below both ends of the free layer are bias magnet films 11b . . . 11b composed of a permanent magnet that applies to the free layer a bias magnetic field in a predetermined direction and an initializing coil 31 that is disposed in the vicinity of the free layer and applies to the free layer a magnetic field having the direction same as that of the bias magnetic field by being energized under a predetermined condition.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: October 6, 2009
    Assignee: Yamaha Corporation
    Inventors: Toshiyuki Oohashi, Yukio Wakui
  • Patent number: 7598862
    Abstract: An apparatus, according to various aspects of the present invention, that couples a provided security device to a provided portal cover and communicating between a first side and a second side of the portal cover. The security device includes a first magnet and a second magnet. The apparatus includes a second device, a first metal fastener, and a second metal fastener. The first metal fastener has a first end portion and a second end portion. The second metal fastener has a third end portion and a fourth end portion. The first end portion and the third end portion are positioned on a first side of the cover. The second end portion and the fourth end portion are positioned on a second side of the cover. The first magnet and the second magnet magnetically and electrically couple to the first end portion and the third end portion respectively thereby coupling the security device to the cover. The second device electrically couples to the second end portion and the fourth end portion.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: October 6, 2009
    Assignee: Roc2Loc, Inc.
    Inventors: Roc Lastinger, John Spenik, Brian Woodbury
  • Publication number: 20090115289
    Abstract: The present invention provides a resonator capable of varying its resonance frequency of good performance with a low dispersion at a high manufacturing yield and a low cost. The resonator comprises a fixed electrode 1; a movable electrode 3 arranged with a predetermined distance apart from and parallel to the fixed electrode; a plurality of conductive leaf springs 2 with conductive property, all of which are bent outward or inward beforehand, arranged parallel apart from each other wherein, one end of each leaf spring is integrated into the fixed electrode and the other end of each leaf spring is integrated into the movable electrode; and an actuator 6 attached to the movable electrode for deforming the leaf springs by pushing or pulling the movable electrode.
    Type: Application
    Filed: June 27, 2006
    Publication date: May 7, 2009
    Applicant: MICRO PRECISION CO. & LTD.
    Inventor: Norihiro Asada
  • Patent number: 7504921
    Abstract: An actuator for moving a load has a frame forming a race between two surfaces thereof, at least two elements joined together by at least one flexible member, the elements and the at least one flexible member being disposed between the two surfaces of the frame that forms a race, one of the elements further joined to the load by a portion of the at least one flexible member, wherein when an element comes into contact with a surface of the frame it will stick thereto absent a repelling force, and moving means disposed to selectively attract or repel a corresponding element towards or away from one or the other of the two surfaces of the frame that forms the race. The actuator effects movement of the load in a direction towards or away from the elements, by changing a position of at least one of the elements on a surface of the frame that forms the race.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: March 17, 2009
    Assignee: United States of America as represented by the Administrator of the National Aeronautics and Space Adminstration
    Inventor: John M. Vranish
  • Patent number: 7488369
    Abstract: A magnetostriction device is made such that an impregnated composition material, such as phenol resin, a resin in which an inorganic material such as silica is dispersed into a phenol resin, an epoxy based resin, or an acrylic resin is impregnated and caked into holes of a magnetostrictive sintered material manufactured by a powder metallurgy method. This magnetostriction device has improved mechanical strength against external force.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: February 10, 2009
    Assignee: Sony Corporation
    Inventors: Yoshio Ohashi, Masaru Uryu
  • Publication number: 20090033448
    Abstract: Conventional devices have a valve needle and a shape memory element which, by the application of a controllable magnetic field, executes a control stroke travel that operates the actuator, and having a coil that excites the magnetic field which is situated in a magnet housing which, at its end face, is bordered with respect to an actuating axis by a front wall in each case, the front walls having a through opening radially within the coil. It is a disadvantage that the magnetic field excited around the coil is conducted unfavorably, so that at most a slight magnetic field develops in the shape memory element. The shape memory element has a magnetic field flowing through it, in the direction of its longitudinal extension, if at all. Since the shape memory element has a high magnetic resistance and is developed to be very long in the axial direction, only a very weak magnetic field can be induced in the shape memory element.
    Type: Application
    Filed: October 5, 2005
    Publication date: February 5, 2009
    Applicant: ROBERT BOSCH GMBH
    Inventors: Anh-Tuan Hoang, Martin Maier, Guenther Hohl
  • Patent number: 7463127
    Abstract: A smart switch has a magnetic operator, at least one magnetic sensor located to sense movement of the magnetic operator, and a processor that processes an output of the magnetic sensor so as to detect right and left over travel ranges and a normal operating range of the magnetic operator. The magnetic sensor may be a magnetoresistive sensor.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: December 9, 2008
    Assignee: Honeywell International Inc.
    Inventors: Hong Wan, Edgar R. Mallison, Michael L. Freeman
  • Patent number: 7456714
    Abstract: A method for reducing a temperature rise of a magnetic material is provided. The method includes applying force to the magnetic material to reduce a dimensional change of the magnetic material during a first part of an operation cycle, such as due to magnetostriction. The force is removed from the magnetic material during a second part of an operation cycle, allowing magnetostrictive dimensional changes to occur.
    Type: Grant
    Filed: October 9, 2006
    Date of Patent: November 25, 2008
    Assignee: IGO, Inc.
    Inventors: Bryan Wayne McCoy, Jason Walter Swanson
  • Publication number: 20080266036
    Abstract: A method for reducing a temperature rise of a magnetic material is provided. The method includes applying force to the magnetic material to reduce a dimensional change of the magnetic material during a first part of an operation cycle, such as due to magnetostriction. The force is removed from the magnetic material during a second part of an operation cycle, allowing magnetostrictive dimensional changes to occur.
    Type: Application
    Filed: July 2, 2008
    Publication date: October 30, 2008
    Inventors: Bryan Wayne McCoy, Jason Walter Swanson
  • Publication number: 20080191822
    Abstract: Provided is a system and method for enabling pressure or acoustic waves to induce magnetostrictive volume or shape change, providing greater control over magnetopropants. A coating material and the spacing between a magnetopropant and a magnetic particle are selected such that a certain pressure causes change in the relative distance of magnetopropant and magnetic particle, thereby changing the amount of magnetostriction. The coating material, magnetopropant, and magnetic particle are assembled to form a pressure sensitive magnetopropant. Given this structure, changes in pressure will cause a fluctuation of the amount of magnetostriction. In a pore space environment, this causes a change in pore space with resulting change in permeability and, hence, changes in fluid flow.
    Type: Application
    Filed: May 2, 2006
    Publication date: August 14, 2008
    Inventor: Charles Saron Knobloch
  • Publication number: 20080084261
    Abstract: A method for reducing a temperature rise of a magnetic material is provided. The method includes applying force to the magnetic material to reduce a dimensional change of the magnetic material during a first part of an operation cycle, such as due to magnetostriction. The force is removed from the magnetic material during a second part of an operation cycle, allowing magnetostrictive dimensional changes to occur.
    Type: Application
    Filed: October 9, 2006
    Publication date: April 10, 2008
    Inventors: Bryan Wayne McCoy, Jason Walter Swanson
  • Patent number: 7335317
    Abstract: The present invention relates to methods of preparing a polymer composite using a giant magnetostrictive material, and more particularly, to polymers composite having various improved properties, in which the advantageous structure of the giant magnetostrictive material produced by unidirectional solidification can be maintained by removing the eutectic phase from the magnetostrictive material and filling resulting voids with a polymer resin.
    Type: Grant
    Filed: July 26, 2005
    Date of Patent: February 26, 2008
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Soon Hyung Hong, Oh Yeoul Kwon, Won Je Park
  • Patent number: 7323960
    Abstract: An actuator includes an electromagnetostrictive element that has one end located on a front side and the other end located on a rear side. An output shaft penetrates the electromagnetostrictive element and is pressurized toward the rear side of the electromagnetostrictive element. A housing houses therein the electromagnetostrictive element and the output shaft, and bearing portions respectively support the front side and the rear side of the output shaft. A bias spring is provided between the rear side of the output shaft and the housing, and a displacement sensor detects a position in an axial direction of the shaft.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: January 29, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Teruo Maruyama
  • Patent number: 7312679
    Abstract: A shock sensor has a housing with a Terfenol-D type sensing element positioned inside a sensing coil. A permanent biasing magnet is positioned in engagement with the Terfenol-D sensing element, and a spacer engages the Terfenol-D sensing element and extends from the housing. The housing has a beam with one or two mounting holes through which fasteners extend to mount the shock sensor to a structural member. The housing places the spacer in compression against the structural member. In an alternative embodiment a DC current can be supplied to the sensing coil to provide the biasing magnetic field. A high frequency filter separates the shock sensing signal from the applied DC biasing current.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: December 25, 2007
    Assignee: Key Safety Systems, Inc.
    Inventor: Steven R. Stuve
  • Patent number: 7298237
    Abstract: A shock sensor has a housing with a Terfenol-D type sensing element positioned inside a sensing coil. A permanent biasing magnet is positioned in engagement with the Terfenol-D sensing element, and a spacer engages the Terfenol-D sensing element and extends from the housing. The housing has a beam with one or two mounting holes through which fasteners extend to mount the shock sensor to a structural member. The housing places the spacer in compression against the structural member. In an alternative embodiment a DC current can be supplied to the sensing coil to provide the biasing magnetic field. A high frequency filter separates the shock sensing signal from the applied DC biasing current.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: November 20, 2007
    Assignee: Key Safety Systems, Inc.
    Inventor: Steven R. Stuve
  • Patent number: 7250839
    Abstract: Magnetostrictive actuator. The actuator includes a flexible substrate and a magnetostrictive film on the substrate. The shape of the flexible substrate is altered in the presence of a magnetic field.
    Type: Grant
    Filed: August 9, 2004
    Date of Patent: July 31, 2007
    Assignee: Energen, Inc.
    Inventors: Livia M. Racz, Chandrashekhar H. Joshi
  • Patent number: 7081801
    Abstract: A shock sensor has a housing with a Terfenol-D type sensing element positioned inside a sensing coil. A permanent biasing magnet is positioned in engagement with the Terfenol-D sensing element, and a spacer engages the Terfenol-D sensing element and extends from the housing. The housing has a beam with one or two mounting holes through which fasteners extend to mount the shock sensor to a structural member. The housing places the spacer in compression against the structural member. In an alternative embodiment a DC current can be supplied to the sensing coil to provide the biasing magnetic field. A high frequency filter separates the shock sensing signal from the applied DC biasing current.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: July 25, 2006
    Assignee: Key Safety Systems, Inc.
    Inventor: Steven R. Stuve
  • Patent number: 7075395
    Abstract: Disclosed is a magnetic sensor provided with a magnetoresistive effect element capable of stably maintaining a direction of magnetization in a magnetic domain of a free layer. The magnetic sensor includes a magnetoresistive effect element provided with narrow zonal portions including a pinned and a free layer. Disposed below both ends of the free layer are bias magnet films that apply a bias magnetic field to the free layer and an initializing coil 31 disposed near the free layer. Further, magnetizing the bias magnet films and fixing a direction of magnetization of the pinned layer are performed by a magnetic field formed by a magnet array configured such that permanent magnets are arranged on a lattice point of a tetragonal lattice wherein magnet pole polarity is different from adjacent magnet pole polarity spaced by the shortest route.
    Type: Grant
    Filed: October 21, 2003
    Date of Patent: July 11, 2006
    Assignee: Yamaha Corporation
    Inventors: Toshiyuki Oohashi, Yukio Wakui
  • Patent number: 6960974
    Abstract: A smart switch has a magnetic operator, at least one magnetic sensor located to sense movement of the magnetic operator, and a processor that processes an output of the magnetic sensor so as to detect right and left over travel ranges and a normal operating range of the magnetic operator. The magnetic sensor may be a magnetoresistive sensor.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: November 1, 2005
    Assignee: Honeywell International Inc.
    Inventors: Hong Wan, Edgar R. Mallison, Michael L. Freeman
  • Patent number: 6803846
    Abstract: An actuator comprising a magnetic, resilient, shape memory member formed by a substance having a twin structure, and a magnetic field generator, at least part of the magnetic, resilient, shape memory member being disposed in a gradient magnetic field generated from the magnetic field generator such that the twin structure is reoriented by the magnetic field, whereby the shape memory resilient member is driven.
    Type: Grant
    Filed: October 23, 2003
    Date of Patent: October 12, 2004
    Assignee: Honda Motor Co., Ltd.
    Inventors: Masahiro Ohta, Toru Sukigara
  • Publication number: 20040126620
    Abstract: A magnetoelectric magnetic field sensor has one or more laminated magnetostrictive layers and piezoelectric layers. The magnetostrictive layers are magnetized by a bias magnetic field in a longitudinal, in-plane direction. The piezoelectric layers can be poled in the longitudinal direction or perpendicular direction. The longitudinal magnetization of the magnetostrictive layers provides greatly increased sensitivity at lower bias fields compared to other magnetoelectric sensors. Perpendicular poling of the piezoelectric layers tends to provide higher sensitivity at lower detection frequency (e.g. less than 1 Hz). Longitudinal poling tends to provide higher sensitivity at high detection frequency (e.g. above 10 Hz). Also included are embodiments having relative thicknesses for the magnetostrictive layers that are optimized for sensitivity. Equations are provided for calculating the best relative thickness for the magnetostrictive layer for maximum sensitivity.
    Type: Application
    Filed: October 20, 2003
    Publication date: July 1, 2004
    Inventors: Dwight Viehland, Shu-Xiang Dong, Jie-Fang Li
  • Patent number: 6702250
    Abstract: An apparatus and method for actuating a valve using magnetostrictive transduction is provided. A ferro-magnetic rod having giant magnetostrictive properties is operatively coupled with a hydraulic chamber. Application of a magnetic field to the ferro-magnetic rod generates strain in the rod and corresponding movement in a first piston, causing the fluid in the hydraulic chamber to become pressurized. The pressurized fluid forces a second piston to move, thereby actuating the valve.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: March 9, 2004
    Assignee: Siemens Automotive Corporation
    Inventor: Perry Robert Czimmek
  • Publication number: 20030137376
    Abstract: An apparatus and method for actuating a valve using magnetostrictive transduction is provided. A ferro-magnetic rod having giant magnetostrictive properties is operatively coupled with a hydraulic chamber. Application of a magnetic field to the ferro-magnetic rod generates strain in the rod and corresponding movement in a first piston, causing the fluid in the hydraulic chamber to become pressurized. The pressurized fluid forces a second piston to move, thereby actuating the valve.
    Type: Application
    Filed: December 20, 2002
    Publication date: July 24, 2003
    Applicant: SIEMENS AUTOMOTIVE CORPORATION
    Inventor: Perry Robert Czimmek
  • Patent number: 6570474
    Abstract: An apparatus and method for actuating a valve using magnetostrictive transduction is provided. A ferro-magnetic rod having giant magnetostrictive properties is operatively coupled with a hydraulic chamber. Application of a magnetic field to the ferro-magnetic rod generates strain in the rod and corresponding movement in a first piston, causing the fluid in the hydraulic chamber to become pressurized. The pressurized fluid forces a second piston to move, thereby actuating the valve.
    Type: Grant
    Filed: February 22, 2001
    Date of Patent: May 27, 2003
    Assignee: Siemens Automotive Corporation
    Inventor: Perry Robert Czimmek
  • Patent number: 6476532
    Abstract: The present invention eliminates vibration of an electromagnetic device, apparatus or machine caused by magnetostrictive and Joule effects. Specifically, the present invention discloses making an electromagnetic device, apparatus or machine with magnetostrictive contracting and magnetostrictive expanding materials. Once exposed to a magnetic field, the amount of contraction and expansion of the materials should be virtually the same to minimize generation of vibratory energy that can be transmitted from a core to a housing.
    Type: Grant
    Filed: December 29, 1998
    Date of Patent: November 5, 2002
    Assignees: Newport News Shipbuilding, Dry Dock Company
    Inventor: Donald E. Kennamer
  • Publication number: 20010045880
    Abstract: An apparatus and method for actuating a valve using magnetostrictive transduction is provided. A ferro-magnetic rod having giant magnetostrictive properties is operatively coupled with a hydraulic chamber. Application of a magnetic field to the ferro-magnetic rod generates strain in the rod and corresponding movement in a first piston, causing the fluid in the hydraulic chamber to become pressurized. The pressurized fluid forces a second piston to move, thereby actuating the valve.
    Type: Application
    Filed: February 22, 2001
    Publication date: November 29, 2001
    Inventor: Perry Robert Czimmek
  • Patent number: 6307286
    Abstract: A super magnetostrictive actuator includes: a magnetic field generating unit, at least first and second super magnetostrictive members extensible in a longitudinal direction thereof due to action of magnetic field generated by the magnetic field generating unit, and a coupling member having a cylindrical shape and disposed coaxially between the first and second super magnetostrictive members. The second super mangetostrictive member has a cylindrical shape and is coaxially disposed to surround the outside of the first super magnetostrictive member in a radial direction thereof. Both end portions of the coupling member are coupled to one end portion of the first super magnetostrictive member and one end portion of the second super magnetostrictive member, respectively.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: October 23, 2001
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Hideharu Yamazaki, Akifumi Otaka, Hiroyuki Goto
  • Patent number: 6300855
    Abstract: A high power magnetostrictive transducer element comprising a material of the formula TbxDyyHozFe2−w wherein 0.24≦x≦0.28, 0.52≦y≦0.56, 0.13≦z≦0.22, x+y+z=1, and 0≦w≦0.20 and wherein the material is prestressed by a compressive force of from about 5 to about 100 MPa.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: October 9, 2001
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Arthur E. Clark, James B. Restorff, Marilyn Wun-Fogle
  • Patent number: 6192096
    Abstract: A magnetostrictive wire control rod position detector assembly which will allow nuclear reactor output to be increased, control performance to be improved, and peripheral equipment to be rationalized by continuously and accurately detecting the position of a control rod in a reactor core is provided. A magnetostrictive wire control rod position detector assembly (20) comprises: a magnet or magnets (21) mounted on a non-magnetic portion of a movable member (3) which is free to move in the longitudinal direction on the inside of a cylindrical member (1) and is partly composed of a non-magnetic material; a magnetostrictive wire detector (22) longitudinally mounted on the outer circumference of said cylindrical member, which is provided with a receiver (26); and a pulsed current generator circuit (37) which supplies a pulsed current from the receiver end to the magnetostrictive wire of the magnetostrictive wire detector.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: February 20, 2001
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Toshio Ichikawa, Yoshiaki Makihara, Syo Imayoshi