Patents by Inventor David Ristau

David Ristau 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: 20230286086
    Abstract: A system may be configured to manufacture a layered cage of a trim. Some embodiments may additively manufacture, in each of a plurality of layers, a plurality of channels each having a cross section such that an amount of the layers satisfies a criterion, the cross section being defined by vertical walls, angular portions that extend from the walls, and a shaped top and/or bottom intersecting with angular portions. And the channels of one of the layers may not intersect with any other channel of any other layer of the cage.
    Type: Application
    Filed: May 18, 2023
    Publication date: September 14, 2023
    Inventors: Robert Wnek, Mark Bober, Brian Jarrett, David Ristau, Kevin Teygart
  • Patent number: 11691231
    Abstract: A system may be configured to manufacture a layered cage of a trim. Some embodiments may additively manufacture, in each of a plurality of layers, a plurality of channels each having a cross section such that an amount of the layers satisfies a criterion, the cross section being defined by vertical walls, angular portions that extend from the walls, and a shaped top and/or bottom intersecting with angular portions. And the channels of one of the layers may not intersect with any other channel of any other layer of the cage.
    Type: Grant
    Filed: April 22, 2021
    Date of Patent: July 4, 2023
    Assignee: Celeros Flow Technology, LLC
    Inventors: Robert Wnek, Mark Bober, Brian Jarrett, David Ristau, Kevin Teygart
  • Publication number: 20220339745
    Abstract: A system may be configured to manufacture a layered cage of a trim. Some embodiments may additively manufacture, in each of a plurality of layers, a plurality of channels each having a cross section such that an amount of the layers satisfies a criterion, the cross section being defined by vertical walls, angular portions that extend from the walls, and a shaped top and/or bottom intersecting with angular portions. And the channels of one of the layers may not intersect with any other channel of any other layer of the cage.
    Type: Application
    Filed: April 22, 2021
    Publication date: October 27, 2022
    Inventors: Robert Wnek, Mark Bober, Brian Jarrett, David Ristau, Kevin Teygart
  • Patent number: 8469341
    Abstract: The present invention relates to an apparatus and method of deploying a desuperheater with a Seat-Ring designed to provide coolant injection at high temperature differential. The present invention's robust design provides for a high level of flexibility that allows operating at high temperature differentials between the coolant and the superheated fluid. The desuperheater Seat-Ring is made as a split hollow ring with a perpendicular slit traversing the ring's circumference. The opened slit design provides a high level of flexibility, which allows the seat ring to sustain severe temperature extremes by reducing thermal stress. The coolant is supplied to the seat ring through a specially designed coolant nipple liner connected to the seat-ring.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: June 25, 2013
    Assignee: SPX Corporation
    Inventors: David Ristau, Veaceslav Ignatan
  • Publication number: 20110298141
    Abstract: The present invention relates to an apparatus and method of deploying a desuperheater with a Seat-Ring designed to provide coolant injection at high temperature differential. The present invention's robust design provides for a high level of flexibility that allows operating at high temperature differentials between the coolant and the superheated fluid. The desuperheater Seat-Ring is made as a split hollow ring with a perpendicular slit traversing the ring's circumference. The opened slit design provides a high level of flexibility, which allows the seat ring to sustain severe temperature extremes by reducing thermal stress. The coolant is supplied to the seat ring through a specially designed coolant nipple liner connected to the seat-ring.
    Type: Application
    Filed: June 3, 2010
    Publication date: December 8, 2011
    Applicant: SPX Corporation
    Inventors: David Ristau, Veaceslav Ignatan
  • Patent number: 5828770
    Abstract: A system for determining the spatial position and angular orientation of an object in real-time is provided having a sensor section and a plurality of activatable markers, adapted for mounting to the object. The plurality of markers are activated simultaneously during each cycle of the sensor section after an initial marker-identification mode and energy emitted by such simultaneously activated markers is detected by the remotely located sensor. With such system, because the markers have been each uniquely identified during the marker-identification mode, and the relative marker geometry is known a prior, the markers can be simultaneously activated, detected and tracked during a subsequent marker-tracking mode. With such an arrangement, less expensive sensors with relatively low sensor cycle rates may be used.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: October 27, 1998
    Assignee: Northern Digital Inc.
    Inventors: Stephen Eldon Leis, David Ristau