Patents by Inventor Jeff L. Hamer

Jeff L. Hamer 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).

  • Push-to-fit earplug with tip cavity
    Patent number: 11304851
    Abstract: An earplug comprises a core and a sound-attenuating body attached to the core, the sound-attenuating body comprising a tip cavity extending proximally from the tip of the sound-attenuating body and comprising a distal opening. The tip cavity side wall includes a plurality of protrusions extending inwardly toward the longitudinal axis of the core. The plurality of protrusions may include from 2 to 12 protrusions. A method of making an earplug includes covering at least a portion of a core with a material including unactivated foaming agent; inserting an end of the core and at least a portion of the material into a mold cavity; and activating the foaming agent to create a sound-attenuating body. The sound-attenuating body has a base, tip, and tip cavity with a plurality of protrusions. The mold cavity may include a boss with a cup and plurality of cut-outs on the cup for forming the protrusions.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: April 19, 2022
    Assignee: 3M Innovative Properties Company
    Inventors: Robert C. Coffin, Matthew V. Stonebraker, Jr., Jacob H. Ely, Jeff L. Hamer, Kenneth F. Teeters, Ravi Thomas
  • PUSH-TO-FIT EARPLUG WITH TIP CAVITY
    Publication number: 20200197224
    Abstract: An earplug comprises a core and a sound-attenuating body attached to the core, the sound-attenuating body comprising a tip cavity extending proximally from the tip of the sound-attenuating body and comprising a distal opening. The tip cavity side wall includes a plurality of protrusions extending inwardly toward the longitudinal axis of the core. The plurality of protrusions may include from 2 to 12 protrusions. A method of making an earplug includes covering at least a portion of a core with a material including unactivated foaming agent; inserting an end of the core and at least a portion of the material into a mold cavity; and activating the foaming agent to create a sound-attenuating body. The sound-attenuating body has a base, tip, and tip cavity with a plurality of protrusions. The mold cavity may include a boss with a cup and plurality of cut-outs on the cup for forming the protrusions.
    Type: Application
    Filed: August 30, 2018
    Publication date: June 25, 2020
    Inventors: Robert C. Coffin, Matthew V. Stonebraker, Jr., Jacob H. Ely, Jeff L. Hamer, Kenneth F. Teeters, Ravi Thomas