Patents by Inventor David L. Trumper

David L. Trumper has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190199186
    Abstract: Described are homopolar bearingless slice motors which include an array arrangement of permanent magnets on stator teeth, and a magnet-free rotor having a unique surface geometry. Also described are related components of such motors. The permanent magnet arrays provide homopolar bias flux to the rotor, and salient features on the rotor surface route the bias flux toward paths desirable for force and torque generation. In an illustrative embodiment, two magnet arrays are placed at the tips of stator teeth, so as to provide the bias flux via relatively short flux paths. By modulating current through windings based upon the rotor radial and angular position measurements, the stator can levitate and rotate the rotor.
    Type: Application
    Filed: November 29, 2018
    Publication date: June 27, 2019
    Inventors: Minkyun Noh, David L. Trumper
  • Patent number: 10323221
    Abstract: A device for controlling apical flow to a cell culture includes an apical insert that defines at least one inlet channel extending from an inlet port to an apical feed port and at least one outlet channel extending from an apical effluent port to an outlet port. The apical insert includes a projecting portion configured to extend into a cell culture insert to a depth that is less than a depth of the cell culture insert, and a contact surface configured to maintain a spatial relationship between the projecting portion and the cell culture insert.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: June 18, 2019
    Assignees: Northeastern University, Massachusetts Institute of Technology
    Inventors: Transon V. Nguyen, Collin D. J. Edington, Emily C. Suter, Rebecca Lyn Carrier, David L. Trumper, Linda G. Griffith
  • Publication number: 20190125946
    Abstract: A highly portable advanced adult and pediatric compact ECLS system is based around an integrated pump-oxygenator. The system includes a central a blood inlet and flow path extending along a general longitudinal axis of the system; a pump housing defining a pump inlet in fluid communication with the central blood flow path; an impeller rotationally received within the area of the pump inlet, wherein the impeller is magnetically supported and magnetically driven; an array of hollow fiber membranes configured for gas transfer within the system for oxygenation of blood flowing across the hollow fiber membranes, wherein the membranes include a covalently-bonded heparin-based bioactive surface, and wherein the blood flow path extends from the impeller to a position to flow perpendicular over the array of hollow fiber membranes; and a blood outlet configured to receive blood flowing past the array of hollow fiber membranes.
    Type: Application
    Filed: December 14, 2018
    Publication date: May 2, 2019
    Inventors: Mark Gartner, Minkyun Noh, David L. Trumper
  • Patent number: 10177627
    Abstract: Described is a bearingless motor based upon a homopolar flux-biased magnetic bearing for force generation and a hysteresis motor for torque generation. The bearingless slice motor levitates and rotates a ring-shaped rotor made of a semi-hard magnetic material. The rotor is biased with a homopolar permanent-magnetic flux, on which 2-pole flux can be superimposed to generate suspension forces. Torque is generated by a hysteretic coupling between the rotor and a rotating multi-pole stator field.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: January 8, 2019
    Assignee: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Minkyun Noh, David L. Trumper
  • Publication number: 20170306278
    Abstract: A device for controlling apical flow to a cell culture includes an apical insert that defines at least one inlet channel extending from an inlet port to an apical feed port and at least one outlet channel extending from an apical effluent port to an outlet port. The apical insert includes a projecting portion configured to extend into a cell culture insert to a depth that is less than a depth of the cell culture insert, and a contact surface configured to maintain a spatial relationship between the projecting portion and the cell culture insert.
    Type: Application
    Filed: January 5, 2017
    Publication date: October 26, 2017
    Inventors: Transon V. Nguyen, Collin D.J. Edington, Emily C. Suter, Rebecca Lyn Carrier, David L. Trumper, Linda G. Griffith
  • Publication number: 20170040868
    Abstract: Described is a bearingless motor based upon a homopolar flux-biased magnetic bearing for force generation and a hysteresis motor for torque generation. The bearingless slice motor levitates and rotates a ring-shaped rotor made of a semi-hard magnetic material. The rotor is biased with a homopolar permanent-magnetic flux, on which 2-pole flux can be superimposed to generate suspension forces. Torque is generated by a hysteretic coupling between the rotor and a rotating multi-pole stator field.
    Type: Application
    Filed: August 3, 2016
    Publication date: February 9, 2017
    Inventors: Minkyun Noh, David L. Trumper
  • Patent number: 9395317
    Abstract: A system and method for providing electromagnetic imaging through electroquasistatic sensing contains an electromagnetic sensor for imaging a sample. The electromagnetic sensor contains drive/sense electronics and a pixelated sensor array having an array of capacitive sensor electrodes that source electric fields that interact with the sample, and wherein the electrodes are individually drivable by the drive/sense electronics in a coordinated manner to establish a desired temporal and spatial pattern in which electrical properties of the electrodes are used to generate an image. Other components of the system include a precision motion controller, sensor head and associated electronics, and a computer for performing data acquisition and signal inversion.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: July 19, 2016
    Assignee: Massachusetts Institute of Technology
    Inventors: Benjamin Louis Cannon, David L. Trumper, Jeffrey H. Lang, Markus Zahn
  • Patent number: 8860260
    Abstract: A system contains a first actuator half containing a first pair of actuator coils and a second pair of actuator coils located above the first pair of actuator coils, wherein the first pair of actuator coils is connected to a first metallic backing. A second actuator half is also providing within the system, which contains a first pair of actuator coils and a second pair of actuator coils located above the first pair of actuator coils, wherein the first pair of actuator coils is connected to a second metallic backing. The system also contains a mechanical flexure suspension having at least one flexure supporting a permanent magnet that is capable of moving, wherein the mechanical flexure suspension is located between the first actuator half and the second actuator half.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: October 14, 2014
    Assignee: Massachusetts Institute of Technology
    Inventors: David L. Trumper, Ian MacKenzie
  • Publication number: 20140159748
    Abstract: A system and method for providing electromagnetic imaging through electroquasistatic sensing contains an electromagnetic sensor for imaging a sample. The electromagnetic sensor contains drive/sense electronics and a pixelated sensor array having an array of capacitive sensor electrodes that source electric fields that interact with the sample, and wherein the electrodes are individually drivable by the drive/sense electronics in a coordinated manner to establish a desired temporal and spatial pattern in which electrical properties of the electrodes are used to generate an image. Other components of the system include a precision motion controller, sensor head and associated electronics, and a computer for performing data acquisition and signal inversion.
    Type: Application
    Filed: February 14, 2014
    Publication date: June 12, 2014
    Applicant: Massachusetts lnstitute of Technology
    Inventors: Benjamin Louis Cannon, David L. Trumper, Jeffrey H. Lang, Markus Zahn
  • Patent number: 8742770
    Abstract: A system for providing electromagnetic imaging through magnetoquasistatic sensing contains an electromagnetic sensor for imaging a sample. The electromagnetic sensor contains drive/sense electronics and a pixelated sensor array having an array of inductive loops that source magnetic fields that interact with the sample, wherein the inductive loops are individually drivable by the drive/sense electronics in a coordinated manner to establish a desired temporal and spatial pattern in which electrical properties of the inductive loops are used to generate an image. Other components of the system include a precision motion controller, sensor head and associated electronics, and a computer for performing data acquisition and signal inversion.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: June 3, 2014
    Assignee: Massachusetts Institute of Technology
    Inventors: David L. Trumper, Benjamin Louis Cannon, Jeffrey H. Lang, Markus Zahn
  • Patent number: 8669771
    Abstract: A system and method for providing electromagnetic imaging through electroquasistatic sensing contains an electromagnetic sensor for imaging a sample. The electromagnetic sensor contains drive/sense electronics and a pixelated sensor array having an array of capacitive sensor electrodes that source electric fields that interact with the sample, and wherein the electrodes are individually drivable by the drive/sense electronics in a coordinated manner to establish a desired temporal and spatial pattern in which electrical properties of the electrodes are used to generate an image. Other components of the system include a precision motion controller, sensor head and associated electronics, and a computer for performing data acquisition and signal inversion.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: March 11, 2014
    Assignee: Massachusetts Institute of Technology
    Inventors: David L. Trumper, Jeffrey H. Lang, Benjamin L. Cannon, Markus Zahn
  • Publication number: 20130271123
    Abstract: A system for providing electromagnetic imaging through magnetoquasistatic sensing contains an electromagnetic sensor for imaging a sample. The electromagnetic sensor contains drive/sense electronics and a pixelated sensor array having an array of inductive loops that source magnetic fields that interact with the sample, wherein the inductive loops are individually drivable by the drive/sense electronics in a coordinated manner to establish a desired temporal and spatial pattern in which electrical properties of the inductive loops are used to generate an image. Other components of the system include a precision motion controller, sensor head and associated electronics, and a computer for performing data acquisition and signal inversion.
    Type: Application
    Filed: June 7, 2013
    Publication date: October 17, 2013
    Inventors: David L. Trumper, Benjamin Louis Cannon, Jeffrey H. Lang, Markus Zahn
  • Patent number: 8482300
    Abstract: A system for providing electromagnetic imaging through magnetoquasistatic sensing contains an electromagnetic sensor for imaging a sample. The electromagnetic sensor contains drive/sense electronics and a pixelated sensor array having an array of inductive loops that source magnetic fields that interact with the sample, wherein the inductive loops are individually drivable by the drive/sense electronics in a coordinated manner to establish a desired temporal and spatial pattern in which electrical properties of the inductive loops are used to generate an image. Other components of the system include a precision motion controller, sensor head and associated electronics, and a computer for performing data acquisition and signal inversion.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: July 9, 2013
    Assignee: Massachusetts Institute of Technology
    Inventors: David L. Trumper, Jeffrey H. Lang, Benjamin L. Cannon, Markus Zahn
  • Patent number: 8358039
    Abstract: A system contains a first actuator half containing a first pair of actuator coils and a second pair of actuator coils located above the first pair of actuator coils, wherein the first pair of actuator coils is connected to a first metallic backing. A second actuator half is also providing within the system, which contains a first pair of actuator coils and a second pair of actuator coils located above the first pair of actuator coils, wherein the first pair of actuator coils is connected to a second metallic backing. The system also contains a mechanical flexure suspension having at least one flexure supporting a permanent magnet that is capable of moving, wherein the mechanical flexure suspension is located between the first actuator half and the second actuator half.
    Type: Grant
    Filed: October 17, 2009
    Date of Patent: January 22, 2013
    Assignee: Massachusetts Institute of Technology
    Inventors: David L. Trumper, Ian MacKenzie
  • Publication number: 20100253332
    Abstract: A system for providing electromagnetic imaging through magnetoquasistatic sensing contains an electromagnetic sensor for imaging a sample. The electromagnetic sensor contains drive/sense electronics and a pixelated sensor array having an array of inductive loops that source magnetic fields that interact with the sample, wherein the inductive loops are individually drivable by the drive/sense electronics in a coordinated manner to establish a desired temporal and spatial pattern in which electrical properties of the inductive loops are used to generate an image. Other components of the system include a precision motion controller, sensor head and associated electronics, and a computer for performing data acquisition and signal inversion.
    Type: Application
    Filed: January 28, 2010
    Publication date: October 7, 2010
    Applicant: Massachusetts Institute of Technology
    Inventors: David L. Trumper, Jeffrey H. Lang, Benjamin L. Cannon, Markus Zahn
  • Publication number: 20100194374
    Abstract: A system and method for providing electromagnetic imaging through electroquasistatic sensing contains an electromagnetic sensor for imaging a sample. The electromagnetic sensor contains drive/sense electronics and a pixelated sensor array having an array of capacitive sensor electrodes that source electric fields that interact with the sample, and wherein the electrodes are individually drivable by the drive/sense electronics in a coordinated manner to establish a desired temporal and spatial pattern in which electrical properties of the electrodes are used to generate an image. Other components of the system include a precision motion controller, sensor head and associated electronics, and a computer for performing data acquisition and signal inversion.
    Type: Application
    Filed: January 28, 2010
    Publication date: August 5, 2010
    Applicant: Massachusetts Institute of Technology
    Inventors: David L. Trumper, Jeffrey H. Lang, Benjamin L. Cannon, Markus Zahn
  • Publication number: 20100100990
    Abstract: A system contains a first actuator half containing a first pair of actuator coils and a second pair of actuator coils located above the first pair of actuator coils, wherein the first pair of actuator coils is connected to a first metallic backing. A second actuator half is also providing within the system, which contains a first pair of actuator coils and a second pair of actuator coils located above the first pair of actuator coils, wherein the first pair of actuator coils is connected to a second metallic backing. The system also contains a mechanical flexure suspension having at least one flexure supporting a permanent magnet that is capable of moving, wherein the mechanical flexure suspension is located between the first actuator half and the second actuator half.
    Type: Application
    Filed: October 17, 2009
    Publication date: April 22, 2010
    Applicant: Massachusetts Institute of Technology
    Inventors: David L. Trumper, Ian MacKenzie
  • Patent number: 7665983
    Abstract: A microcontact printing tool having a print unit including a stamp head with a stamp and a wafer chuck for retaining a substrate. The stamp contained by the stamped head movable relative to the substrate by an actuator and a stage. A plurality of sensors detect the position of the stamp relative to substrate. A method of using the printing tool that includes a real-time feedback for consistent and accurate application of force during the printing of the substrate. The stamp head includes a pressure chamber carrying the stamp. The stamp backing is deflected prior to contact of the stamp with the substrate to form a minimum point and the stamp backing and the stamp is returned to a plane to create a printing propagation contact. An apparatus has a master backing and a stamping backing in close proximity and the stamp material drawn in through a vacuum. The stamp is separated from the master by use of a parting fluid.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: February 23, 2010
    Assignee: Massachusetts Institute of Technology
    Inventors: Amar Maruti Kendale, David L. Trumper
  • Patent number: 7616084
    Abstract: The preferred embodiments of the present invention are directed to high bandwidth positioning systems such as fast tool servos (FTS). The applications of this invention include, for example, diamond turning of mold with structured surface for mass production of films for brightness enhancement and controlled reflectivity, diamond turning of molds for contact lens and micro-optical positioning devices. Preferred embodiments of the fast tool servo can have a closed-loop bandwidth of approximately 20±5 kHz, with acceleration of up to approximately 1000 G or more. The resolution or position error is approximately 1 nm root mean square (RMS). In a preferred embodiment, the full stroke of 50 ?m can be achieved up to 1 kHz operation.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: November 10, 2009
    Assignee: Massachusetts Institute of Technology
    Inventors: Xiaodong Lu, David L. Trumper
  • Patent number: 7574947
    Abstract: A high bandwidth rotary fast tool servo provides tool motion in a direction nominally parallel to the surface-normal of a workpiece at the point of contact between the cutting tool and workpiece. Three or more flexure blades having all ends fixed are used to form an axis of rotation for a swing arm that carries a cutting tool at a set radius from the axis of rotation. An actuator rotates a swing arm assembly such that a cutting tool is moved in and away from the lathe-mounted, rotating workpiece in a rapid and controlled manner in order to machine the workpiece. One or more position sensors provides rotation and position information for a swing arm to a control system. A control system commands and coordinates motion of the fast tool servo with the motion of a spindle, rotating table, cross-feed slide, and in-feed slide of a precision lathe.
    Type: Grant
    Filed: September 14, 2004
    Date of Patent: August 18, 2009
    Assignee: Massachusetts Institute of Technology
    Inventors: Richard C. Montesanti, David L. Trumper, James L. Kirtley, Jr.