Patents by Inventor William K. Shaffer

William K. Shaffer 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).

  • SCBA with enhanced emergency breathing support system
    Patent number: 12403337
    Abstract: A reducer for a self-contained breathing apparatus (SCBA), comprising a primary air pathway with a primary metering valve and a secondary air pathway with a secondary metering valve. The reducer has an Emergency Breathing Support System (EBSS) outlet that is fluidly connected to a branch line of the secondary air pathway.
    Type: Grant
    Filed: June 20, 2022
    Date of Patent: September 2, 2025
    Assignee: 3M Innovative Properties Company
    Inventors: Darrill L. Plummer, William E. Parson, William K. Shaffer
  • SCBA with Enhanced Emergency Breathing Support System
    Publication number: 20230001241
    Abstract: A reducer for a self-contained breathing apparatus (SCBA), comprising a primary air pathway with a primary metering valve and a secondary air pathway with a secondary metering valve. The reducer has an Emergency Breathing Support System (EBSS) outlet that is fluidly connected to a branch line of the secondary air pathway.
    Type: Application
    Filed: June 20, 2022
    Publication date: January 5, 2023
    Inventors: Darrill L. Plummer, William E. Parson, William K. Shaffer