Patents by Inventor Stephen Everett

Stephen Everett 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).

  • Systems and methods for stabilizing a playback device
    Patent number: 12634634
    Abstract: A negative-stiffness audio transducer can include a frame, a voice coil, and a suspension assembly resiliently attaching the voice coil to the frame. The suspension assembly provides a negative stiffness to axial movement of the voice coil. The transducer further includes a diaphragm coupled to the voice coil such that the voice coil moves the diaphragm in an axially inward direction or an axially outward direction in response to an electrical signal. A stabilizer can be used to selectively move the diaphragm axially inward or outward to maintain the audio transducer in an operational state.
    Type: Grant
    Filed: December 29, 2023
    Date of Patent: May 19, 2026
    Assignee: Sonos, Inc.
    Inventors: Timothy W. Sheen, Jonathan Oswaks, Linduo Liu, Minqiang Yang, Stephen Everett, Nigel Pemberton-Pigott, Michael Ahrens
  • SUSPENSION MEMBERS FOR AUDIO PLAYBACK DEVICES
    Publication number: 20250344023
    Abstract: A negative-stiffness audio transducer assembly includes a frame, a voice coil configured to move a diaphragm inward or outward along an axis, and a suspension assembly coupled to the frame and the voice coil. The suspension assembly includes a first spring having a radially outer end portion coupled to the frame, a radially inner end portion coupled to the voice coil, and an intermediate portion therebetween that is displaced in an axial direction from the first end portion and the second end portion. A second spring is arranged opposite the first spring with respect to the voice coil, and includes a radially outer end portion coupled to the frame, a radially inner end portion coupled to the voice coil, and an intermediate portion therebetween that is displaced in an axial direction from the first end portion and the second end portion.
    Type: Application
    Filed: May 5, 2023
    Publication date: November 6, 2025
    Inventors: Michael Ahrens, Stephen Everett, Timothy W. Sheen, Jonathan Oswaks, Nigel Pemberton-Pigott
  • SYSTEMS AND METHODS FOR STABILIZING A PLAYBACK DEVICE
    Publication number: 20250220356
    Abstract: A negative-stiffness audio transducer can include a frame, a voice coil, and a suspension assembly resiliently attaching the voice coil to the frame. The suspension assembly provides a negative stiffness to axial movement of the voice coil. The transducer further includes a diaphragm coupled to the voice coil such that the voice coil moves the diaphragm in an axially inward direction or an axially outward direction in response to an electrical signal. A stabilizer can be used to selectively move the diaphragm axially inward or outward to maintain the audio transducer in an operational state.
    Type: Application
    Filed: December 29, 2023
    Publication date: July 3, 2025
    Inventors: Timothy W. Sheen, Jonathan Oswaks, Linduo Liu, Minqiang Yang, Stephen Everett, Nigel Pemberton-Pigott, Michael Ahrens
  • Chassis assembly for a motorcycle
    Patent number: D496886
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: October 5, 2004
    Assignee: Brumby Corporation Limited
    Inventors: Stephen Everett, Benjamin Wood, Stephen Thompson, Gavin Palmer, Clive Kilford, Nicholas Carpenter, David Rendell