Patents by Inventor Jacob RIDDERHOFF

Jacob RIDDERHOFF 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).

  • Stepper motor control valves for refrigerant expansion and/or system controls
    Patent number: 11619429
    Abstract: A valve includes a shaft having threads along at least a portion of a length of the shaft. A travel limit member (e.g., a coil spring, a washer, etc.) is disposed within one or more of the threads. The travel limit member may comprise a coil spring configured to be movable within the threads along the shaft when the shaft is rotated relative to the coil spring. The coil spring is configured to be operable for providing: a safety stall or hard stop for a fully open position of the valve when the coil spring is within the top thread and/or runs out of the threads after having traveled upwardly along the shaft within the threads; and a safety stall or hard stop for a fully closed position of the valve when the coil spring contacts a stop after having traveled downwardly along the shaft within the threads.
    Type: Grant
    Filed: April 1, 2021
    Date of Patent: April 4, 2023
    Assignee: Emerson Electric Co.
    Inventors: Gregory E. Sisk, Jeffrey N. Arensmeier, Christina M. Gilliam, Joseph B. Sutton, III, Thomas Stoneking, Jacob Ridderhoff
  • STEPPER MOTOR CONTROL VALVES FOR REFRIGERANT EXPANSION AND/OR SYSTEM CONTROLS
    Publication number: 20220316776
    Abstract: A valve includes a shaft having threads along at least a portion of a length of the shaft. A travel limit member (e.g., a coil spring, a washer, etc.) is disposed within one or more of the threads. The travel limit member may comprise a coil spring configured to be movable within the threads along the shaft when the shaft is rotated relative to the coil spring. The coil spring is configured to be operable for providing: a safety stall or hard stop for a fully open position of the valve when the coil spring is within the top thread and/or runs out of the threads after having traveled upwardly along the shaft within the threads; and a safety stall or hard stop for a fully closed position of the valve when the coil spring contacts a stop after having traveled downwardly along the shaft within the threads.
    Type: Application
    Filed: April 1, 2021
    Publication date: October 6, 2022
    Inventors: Gregory E. SISK, Jeffrey N. ARENSMEIER, Christina M. GILLIAM, Joseph B. SUTTON, III, Thomas STONEKING, Jacob RIDDERHOFF