Patents by Inventor John Knudson

John Knudson 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: 11959557
    Abstract: An evacuation unit is configured to remove entrapped fluid from a flow control. These configurations may incorporate devices that can passively discharge fluid in response to loss of system pressure. These devices may use gravity or spring-assist as mechanisms to move fluid out of spaces in the device. This feature mitigates risks that the entrapped fluid freezes and expands, which can cause damage to metal components and lead to extensive downtime of process lines. As an added benefit, the features can reduce product costs or complexity because the proposed designs avoid the need for additional, peripheral “accessories,” like pumps or heating elements, resident at the location of the flow control.
    Type: Grant
    Filed: August 31, 2022
    Date of Patent: April 16, 2024
    Assignee: Dresser, LLC
    Inventors: Rajesh Krithivasan, Richard John Klimas, Jr., Jason Glen Knudson
  • Publication number: 20240068586
    Abstract: An evacuation unit is configured to remove entrapped fluid from a flow control. These configurations may incorporate devices that can passively discharge fluid in response to loss of system pressure. These devices may use gravity or spring-assist as mechanisms to move fluid out of spaces in the device. This feature mitigates risks that the entrapped fluid freezes and expands, which can cause damage to metal components and lead to extensive downtime of process lines. As an added benefit, the features can reduce product costs or complexity because the proposed designs avoid the need for additional, peripheral “accessories,” like pumps or heating elements, resident at the location of the flow control.
    Type: Application
    Filed: August 31, 2022
    Publication date: February 29, 2024
    Inventors: Rajesh Krithivasan, Richard John Klimas, JR., Jason Glen Knudson
  • Patent number: 8118339
    Abstract: A PVC primer and glue can caddy for carrying and keeping together a can of PVC primer and a can of glue comprises horizontal base with two circular shaped indentures to accommodate the cans, a vertical stand with a handle and two slit shaped apertures. The caddy also has a strap with a hook portion and a loop portion that is slid through the slit apertures forming a closed loop attachment for the cans while placed in the circular indentures and a recessed screw is also provided for attaching the horizontal base to the vertical stand.
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: February 21, 2012
    Inventor: Douglas John Knudson
  • Publication number: 20060142695
    Abstract: The present invention is an electrophysiology, RF ablation, or similar catheter (i.e., catheter or sheath) that includes an actuator that significantly increases the length of travel (i.e., steering travel) of the actuation wires, as compared to the length of travel provided by prior art actuators. The catheter includes a hollow flexible tubular body, a pair of actuation wires disposed in a side-by-side relationship in the body, a handle attached to a proximal end of the body, an actuator pivotally mounted to the handle, an arcuate internal gear rack disposed on the actuator, one or more pulleys pivotally mounted on the handle and coaxially coupled to a pinion gear engaged with the gear rack, and a guide block mounted within the handle. The one or more pulleys include a first channel in which the first actuation wire resides and a second channel in which the second actuation wire resides. The actuation wires pass through holes in the guide block, which aligns the wires into their respective channels.
    Type: Application
    Filed: December 28, 2004
    Publication date: June 29, 2006
    Inventor: John Knudson
  • Publication number: 20060084964
    Abstract: A hydraulically assisted actuator in a handle connects with a catheter having a deflectable distal ablation tip. The hydraulic actuator translates small mechanical movement by a clinician into large travel movements of connected steering cables and increased tension in the ablation tip for greater deflection. The hydraulic system further dampens the return of the ablation tip from a deflected position to an equilibrium position. The hydraulic actuation system is also incorporated into a set of foot pedals.
    Type: Application
    Filed: July 20, 2004
    Publication date: April 20, 2006
    Inventors: John Knudson, Andrew Forsberg