Patents by Inventor Alvin Zheng-Hui YU

Alvin Zheng-Hui YU 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).

  • MONITORING PRINTING FLUIDS
    Publication number: 20240181788
    Abstract: Example implementations provide a controller to determine a printing fluid abnormality associated with an ink supply channel of a printer; the controller comprising: an input to receive a signal output by a pressure sensor; the signal being indicative of ink pressure associated with the ink supply channel, and a monitor to determine from a characteristic of the signal the presence of an abnormality in the printing fluid.
    Type: Application
    Filed: March 29, 2021
    Publication date: June 6, 2024
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Ana OROPESA FISICA, Dorkaitz Alain VAZQUEZ FERNANDEZ, Alberto BORREGO LEBRATO, Jennifer M. KORNGIEBEL, Alvin Zheng-Hui YU, Miquel BOLEDA BUSQUETS, Ryan SUELZLE
  • FLUID DELIVERY SYSTEM WITH PUMP SERVICING FEATURES
    Publication number: 20230286285
    Abstract: A printing fluid delivery system comprising a fluid pump having an inlet and an outlet, a valve connected to the outlet of the fluid pump, and a controller to close the valve while the fluid pump is driven to increase the pressure at the outlet of the fluid pump based on a service condition and to open the valve based on a predefined relief condition to relieve the pressure at the outlet of the fluid pump.
    Type: Application
    Filed: July 20, 2020
    Publication date: September 14, 2023
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Dorkaitz Alain VAZQUEZ FERNANDEZ, Alvin Zheng-Hui YU, Joan-Albert MIRAVET JIMENEZ, Albert CRESPI SERRANO