Patents by Inventor William Keith Durfee

William Keith Durfee 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: 20220233101
    Abstract: Embodiments relate to devices, systems and methods for monitoring neuromuscular blockage. In an embodiment, a neuromuscular blockage monitoring system comprises a patch device comprising a unitary patch body, at least two electrodes and at least one sensor, the at least one sensor arranged between the at least two electrodes on the unitary patch body; and a stimulator device operatively coupled to the patch device and configured to provide at least one electrical signal to the at least two electrodes to stimulate a muscle motor point and to receive a signal from the at least one sensor related to a result of the stimulation of the muscle motor point.
    Type: Application
    Filed: February 8, 2022
    Publication date: July 28, 2022
    Inventors: William Keith DURFEE, Paul Anthony IAIZZO, Jesus Arturo CABRERA, Jenna Christine IAIZZO, John MEHAWEJ, Kevin RUDA, Jason Paul MCCONNELL
  • Patent number: 11300116
    Abstract: Hydraulic cylinders and methods of fabricating hydraulic cylinders, including long-stroke rolling diaphragm cylinders with any stroke length. In some embodiments, the cylinders are manufactured to have a stroke length to bore diameter (“stroke-to-bore”) ratio optionally greater than 1:1. Various embodiments are suitable for use in a passive hydraulic body-powered wearable robot, for example.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: April 12, 2022
    Assignee: Regents of the University of Minnesota
    Inventors: Saeed Hashemi, William Keith Durfee
  • Patent number: 11241171
    Abstract: Embodiments relate to devices, systems and methods for monitoring neuromuscular blockage. In an embodiment, a neuromuscular blockage monitoring system comprises a patch device comprising a unitary patch body, at least two electrodes and at least one sensor, the at least one sensor arranged between the at least two electrodes on the unitary patch body; and a stimulator device operatively coupled to the patch device and configured to provide at least one electrical signal to the at least two electrodes to stimulate a muscle motor point and to receive a signal from the at least one sensor related to a result of the stimulation of the muscle motor point.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: February 8, 2022
    Assignee: Regents of the University of Minnesota
    Inventors: William Keith Durfee, Paul Anthony Iaizzo, Jesus Arturo Cabrera, Jenna Christine Iaizzo, John Mehawej, Kevin Ruda, Jason Paul McConnell
  • Publication number: 20200132067
    Abstract: Hydraulic cylinders and methods of fabricating hydraulic cylinders, including long-stroke rolling diaphragm cylinders with any stroke length. In some embodiments, the cylinders are manufactured to have a stroke length to bore diameter (“stroke-to-bore”) ratio optionally greater than 1:1. Various embodiments are suitable for use in a passive hydraulic body-powered wearable robot, for example.
    Type: Application
    Filed: August 26, 2019
    Publication date: April 30, 2020
    Applicant: Regents of the University of Minnesota
    Inventors: Saeed Hashemi, William Keith Durfee
  • Publication number: 20170164875
    Abstract: Embodiments relate to devices, systems and methods for monitoring neuromuscular blockage. In an embodiment, a neuromuscular blockage monitoring system comprises a patch device comprising a unitary patch body, at least two electrodes and at least one sensor, the at least one sensor arranged between the at least two electrodes on the unitary patch body; and a stimulator device operatively coupled to the patch device and configured to provide at least one electrical signal to the at least two electrodes to stimulate a muscle motor point and to receive a signal from the at least one sensor related to a result of the stimulation of the muscle motor point.
    Type: Application
    Filed: July 16, 2015
    Publication date: June 15, 2017
    Inventors: William Keith DURFEE, Paul Anthony IAIZZO, Jesus Arturo CABRERA, Jenna Christine IAIZZO, John MEHAWEJ, Kevin RUDA, Jason Paul MCCONNELL
  • Publication number: 20130333368
    Abstract: The invention herein described consists of a single-cylinder free-piston engine system comprising a combustion cylinder, a compression cylinder, a seal between the two cylinders and a piston assembly, capable of being produced in a miniature scale (e.g., less than 10 cubic centimeters volume). The combustion cylinder consists of a holding chamber wherein fuel enters through a fuel inlet port before combustion, a combustion chamber wherein combustion occurs according to an HCCI process, after which the excess fuel and exhaust leaves the engine system through a port for exhaust, and a port extending from the holding chamber to the combustion chamber. The compression cylinder comprises a compression chamber wherein a compressible a compressible fluid enters through an inlet port, is compressed by the single-cylinder engine system, and the compressed fluid exits through an outlet port, and a rebound chamber wherein energy from the combustion process is conserved by a rebound element.
    Type: Application
    Filed: June 18, 2013
    Publication date: December 19, 2013
    Inventors: William Keith Durfee, David B. Kittelson, Lei Tian