Patents by Inventor James E. Stevens

James E. Stevens 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).

  • Patent number: 10074522
    Abstract: The present invention relates to systems and methods for preparing reactively sputtered films. The films are generally thin transition metal oxide (TMO) films having an optimum stoichiometry for any useful device (e.g., a sub-stoichiometric thin film for a memristor device). Described herein are systems, methods, and calibrations processes that employ rapid control of partial pressures to obtain the desired film.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: September 11, 2018
    Assignee: National Technology & Engineering Solutions of Sandia, LLC
    Inventors: James E. Stevens, Patrick R. Mickel, Andrew Lohn, Matthew Marinella
  • Patent number: 9388842
    Abstract: A screw comprising a drive part, a threaded part, and a retaining ring is disclosed herein. Each of the drive part and the threaded part comprises a plurality of interface surfaces that transmit torque from the drive part to the threaded part and prevent the parts from disengaging from one another during use. Each plurality of interface surfaces forms one or more geometric shapes that create additional friction between the drive and threaded parts, and may further include mating pins and holes to prevent the parts from detaching from one another. The retaining ring, which removably connects the screw to a wrench during assembly of the screw with a receptacle, is disposed within a cavity formed when the drive part is assembled with the threaded part.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: July 12, 2016
    Assignee: Callaway Golf Company
    Inventors: Patrick Dawson, Robert Cruz, Thomas J. DiMarco, Daniel C. Fox, James E. Stevens, Alan C. Bettencourt
  • Patent number: 9203134
    Abstract: A micromechanical resonator is disclosed. The resonator includes a resonant micromechanical element. A film of annealable material can be deposited on a facial surface of the element. The resonance of the element can be tuned by annealing the deposited film. Also disclosed are methods of applying a film on a resonator and annealing the film, thereby tuning one or more resonant properties of the resonator.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: December 1, 2015
    Assignee: Sandia Corporation
    Inventors: Michael David Henry, Roy H. Olsson, Karl Douglas Greth, Travis Ryan Young, Janet Nguyen, James E. Stevens
  • Publication number: 20150110576
    Abstract: A screw comprising a drive part, a threaded part, and a retaining ring is disclosed herein. Each of the drive part and the threaded part comprises a plurality of interface surfaces that transmit torque from the drive part to the threaded part and prevent the parts from disengaging from one another during use. Each plurality of interface surfaces forms one or more geometric shapes that create additional friction between the drive and threaded parts, and may further include mating pins and holes to prevent the parts from detaching from one another. The retaining ring, which removably connects the screw to a wrench during assembly of the screw with a receptacle, is disposed within a cavity formed when the drive part is assembled with the threaded part.
    Type: Application
    Filed: December 22, 2014
    Publication date: April 23, 2015
    Inventors: Patrick Dawson, Robert Cruz, Thomas J. DiMarco, Daniel C. Fox, James E. Stevens, Alan C. Bettencourt
  • Patent number: 8915688
    Abstract: A screw comprising a drive part, a threaded part, and a retaining ring is disclosed herein. Each of the drive part and the threaded part comprises a plurality of interface surfaces that transmit torque from the drive part to the threaded part and prevent the parts from disengaging from one another during use. Each plurality of interface surfaces forms one or more geometric shapes that create additional friction between the drive and threaded parts, and may further include mating pins and holes to prevent the parts from detaching from one another. The retaining ring, which removably connects the screw to a wrench during assembly of the screw with a receptacle, is disposed within a cavity formed when the drive part is assembled with the threaded part.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: December 23, 2014
    Assignee: Callaway Golf Company
    Inventors: Patrick Dawson, Robert Cruz, Thomas J. DiMarco, Daniel C. Fox, James E. Stevens, Alan C. Bettencourt
  • Patent number: 8872246
    Abstract: Apparatus is disclosed in which at least one resistive switching element is interposed between at least a first and a second conducting electrode element. The resistive switching element comprises a metal oxynitride. A method for making such a resistive switching element is also disclosed.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: October 28, 2014
    Assignee: Sandia Corporation
    Inventors: James E. Stevens, Matthew Marinella, Andrew John Lohn
  • Publication number: 20140186138
    Abstract: A screw comprising a drive part, a threaded part, and a retaining ring is disclosed herein. Each of the drive part and the threaded part comprises a plurality of interface surfaces that transmit torque from the drive part to the threaded part and prevent the parts from disengaging from one another during use. Each plurality of interface surfaces forms one or more geometric shapes that create additional friction between the drive and threaded parts, and may further include mating pins and holes to prevent the parts from detaching from one another. The retaining ring, which removably connects the screw to a wrench during assembly of the screw with a receptacle, is disposed within a cavity formed when the drive part is assembled with the threaded part.
    Type: Application
    Filed: March 7, 2014
    Publication date: July 3, 2014
    Applicant: Callaway Golf Company
    Inventors: Patrick Dawson, Robert Cruz, Thomas J. DiMarco, Daniel C. Fox, James E. Stevens, Alan C. Bettencourt
  • Patent number: 8696283
    Abstract: A screw comprising a drive part, a threaded part, and a retaining ring is disclosed herein. Each of the drive part and the threaded part comprises a plurality of interface surfaces that transmit torque from the drive part to the threaded part and prevent the parts from disengaging from one another during use. Each plurality of interface surfaces forms one or more geometric shapes that create additional friction between the drive and threaded parts, and may further include mating pins and holes to prevent the parts from detaching from one another. The retaining ring, which removably connects the screw to a wrench during assembly of the screw with a receptacle, is disposed within a cavity formed when the drive part is assembled with the threaded part.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: April 15, 2014
    Assignee: Callaway Golf Company
    Inventors: Patrick Dawson, Robert Cruz, Thomas J. DiMarco, Daniel C. Fox, James E. Stevens, Alan C. Bettencourt
  • Publication number: 20140086705
    Abstract: A screw comprising a drive part, a threaded part, and a retaining ring is disclosed herein. Each of the drive part and the threaded part comprises a plurality of interface surfaces that transmit torque from the drive part to the threaded part and prevent the parts from disengaging from one another during use. Each plurality of interface surfaces forms one or more geometric shapes that create additional friction between the drive and threaded parts, and may further include mating pins and holes to prevent the parts from detaching from one another. The retaining ring, which removably connects the screw to a wrench during assembly of the screw with a receptacle, is disposed within a cavity formed when the drive part is assembled with the threaded part.
    Type: Application
    Filed: January 30, 2013
    Publication date: March 27, 2014
    Applicant: CALLAWAY GOLF COMPANY
    Inventors: Patrick Dawson, Robert Cruz, Thomas J. DiMarco, Daniel C. Fox, James E. Stevens, Alan C. Bettencourt
  • Patent number: 7855345
    Abstract: The invention relates to a field adjustable pressure switch that incorporates a manually adjustable differential to set the pressure level for the trip point for the pressure switch used in conjunction with a submersible sump pump system requiring trip levels corresponding to the desired water level in the sump well for operation of the pump motor.
    Type: Grant
    Filed: November 19, 2007
    Date of Patent: December 21, 2010
    Assignee: Stevens Pump Company
    Inventors: James E. Stevens, Geoffrey M. Stevens, Bill Irwin, Leung Wai Tat Raymond
  • Publication number: 20090129940
    Abstract: The invention relates to a field adjustable pressure switch that incorporates a manually adjustable differential to set the pressure level for the trip point for the pressure switch used in conjunction with a submersible sump pump system requiring trip levels corresponding to the desired water level in the sump well for operation of the pump motor.
    Type: Application
    Filed: November 19, 2007
    Publication date: May 21, 2009
    Inventors: James E. Stevens, Geoffrey M. Stevens, Bill Irwin, Leung Wai Tat Raymond
  • Patent number: 7019683
    Abstract: A security system senses intrusions into a shipping container through the opening of doors, cutting an opening, or removing the doors from their hinges. Intrusion information is transmitted to a remote receiver without interrogation, thereby reducing power consumption. Sensing is accomplished by employing a range-gated micro-impulse radar (“RGR”) that generates microwave pulses that bounce around the interior of the container. The RGR includes a range gate that enables measuring reflected signals during the time gate period that is set for the time it takes a pulse to propagate a maximum distance within the container and reflect back. A direct current signal level is produced that represents the average reflected signal level within the container, and a Doppler shift measurement is made that represents motion inside the container. The signals are conveyed to the transmitter for conveyance to the remote receiver.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: March 28, 2006
    Assignee: General Electric Company
    Inventors: James E. Stevens, Frederick W. Eggers, Feng Tang, Niall Creedon, Douglas H. Marman
  • Patent number: 6808952
    Abstract: A process is disclosed for forming a microelectromechanical (MEM) structure on a substrate having from 5 to 6 or more layers of deposited and patterned polysilicon. The process is based on determining a radius of curvature of the substrate which is bowed due to accumulated stress in the layers of polysilicon and a sacrificial material used to buildup the MEM structure, and then providing one or more stress-compensation layers on a backside of the substrate to flatten the substrate and allow further processing.
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: October 26, 2004
    Assignee: Sandia Corporation
    Inventors: Jeffry J. Sniegowski, Thomas W. Krygowski, Seethambal S. Mani, Scott D. Habermehl, Dale L. Hetherington, James E. Stevens, Paul J. Resnick, Steven R. Volk
  • Patent number: 6663136
    Abstract: The coupling interconnects a trailer and a conventional hand-held two-wheeled cart. The coupling includes a frame to which a ball of a ball and socket joint is connected. The frame has a recess which is adapted to removably receive the forward portion of a lower plate of the cart. The coupling is connected to the cart by inserting the forward portion into the recess. The coupling is then positioned such that its ball is beneath the socket on the hitch of the trailer. When the cart is tipped backward, the ball rises and enters the socket and lifts the hitch thereby permitting the trailer to be moved by the cart.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: December 16, 2003
    Inventor: James E. Stevens
  • Publication number: 20020093173
    Abstract: The coupling interconnects a trailer and a conventional hand-held two-wheeled cart. The coupling includes a frame to which a ball of a ball and socket joint is connected. The frame has a recess which is adapted to removably receive the forward portion of a lower plate of the cart. The coupling is connected to the cart by inserting the forward portion into the recess. The coupling is then positioned such that its ball is beneath the socket on the hitch of the trailer. When the cart is tipped backward, the ball rises and enters the socket and lifts the hitch thereby permitting the trailer to be moved by the cart.
    Type: Application
    Filed: January 11, 2002
    Publication date: July 18, 2002
    Inventor: James E. Stevens
  • Patent number: 5809595
    Abstract: A frictionally variant seat pad comprising a top member, a bottom member, a polyester filling and a plurality of hook and loop receiving strips. The polyester filling is disposed between the top and bottom member, and the top and bottom member are secured in fixed relation to one another by means of stitching located along the perimeter of both the top and bottom members. The surface of the top member is constructed of satin, which provides a low co-efficient of friction, allowing an individual to easily slide upon the surface. The bottom member is provided with a non-slip, rubberized backing, which, due to the low co-efficient of friction afforded by the non-slip rubberized backing, grips to the surface upon which the frictionally variant seat pad rests, thereby preventing movement of the frictionally variant seat pad.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: September 22, 1998
    Inventors: James E. Stevens, M. Joyce Stevens
  • Patent number: 5690717
    Abstract: A process for producing iron carbide in a fluid bed reactor in which the pressure may be maintained in excess of the pressure at which the mole fraction of hydrogen in the process gas begins to decrease. The hydrogen concentration is increased above the equilibrium concentration for hydrogen at the temperature and pressure in the reactor. Further improvements are gained by preheating a iron ore reactor feed in which the iron oxide is primarily in the form of hematite under a reducing atmosphere, and using at least two fluid bed reactors in series.
    Type: Grant
    Filed: March 29, 1995
    Date of Patent: November 25, 1997
    Assignee: Iron Carbide Holdings, Ltd.
    Inventors: James E. Stevens, Arden W. Swanson
  • Patent number: 5587038
    Abstract: A high density elongated plasma is produced by the interaction of an electrically conductive planar antenna located outside of a processing chamber, and a magnetic field generating means, also located outside of the processing chamber. A magnetic field perpendicular to the plane of the antenna is generated within the processing chamber by the magnetic field generating means. The antenna is electrically coupled to a radio frequency power source to generate a helicon wave in the processing chamber to produce a plasma of a gas in the processing chamber. The magnetic field generated by the magnetic field generating means elongates the plasma within the processing chamber.
    Type: Grant
    Filed: June 16, 1994
    Date of Patent: December 24, 1996
    Assignee: Princeton University
    Inventors: Joseph L. Cecchi, James E. Stevens
  • Patent number: 5302803
    Abstract: A plasma processing apparatus and method using a predetermined proportion of relative power between a TE.sub.11 mode and a TM.sub.01 mode to produce radial uniformity of the plasma. A microwave coupler transforms microwave energy from a microwave source into approximately equal proportions of TE.sub.11 and TM.sub.01 modes. In one embodiment, the coupler includes a first arm for generating the TE.sub.11 mode and a second arm for generating the TM.sub.01 mode which are then combined in a cylindrical waveguide section having a sufficient inner diameter to support propagation of both modes. Other circuit components are provided to prevent cross-coupling of the TE.sub.11 mode into the TM.sub.01 generating arm, and vice versa. Thus, the relative proportion of power of each mode may be independently controlled. A magnetic field generator may be used in the apparatus to create an electron cyclotron resonance condition within the plasma.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: April 12, 1994
    Assignee: Consortium for Surface Processing, Inc.
    Inventors: James E. Stevens, Joseph L. Cecchi
  • Patent number: 5111111
    Abstract: A microwave source is coupled to an electron cyclotron resonance (ECR) system by circularly polarizing the microwave energy from the source in an angular direction with cooperates with the ECR system's magnetic field to produce electron cyclotron resonance, and coupling the circularly polarized microwave energy to the plasma using a quarter wave vacuum window transformer having a dielectric constant which matches the impedance of the circularly polarized microwave energy to the impedance of the plasma. The impedance matching transformer is preferably a vacuum window of the ECR chamber having quarter wave thickness and the appropriate dielectric constant. For high density plasmas in a standard ECR system of 6 cm radius an alumina window 0.98 cm thick procides optimum coupling. The reflected power from the plasma is thereby minimized to provide a dense plasma for the ECR tool while reducing or eliminating the need for manual external tuners for the microwave source.
    Type: Grant
    Filed: September 27, 1990
    Date of Patent: May 5, 1992
    Assignee: Consortium for Surface Processing, Inc.
    Inventors: James E. Stevens, Joseph L. Cecchi, Patrick L. Colestock