Patents by Inventor Curtis J. Kemper

Curtis J. Kemper 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).

  • Diopter adjustment for optical device with overlapping left-handed and right-handed threads
    Patent number: 11493304
    Abstract: A diopter adjustment device for an optical device such as a riflescope includes a first tubular member having overlapping left-handed and right-handed external threads, a second tubular member has internal threads mated with either the left-handed or right-handed external threads of the first tubular member, and a stop nut threaded onto the first tubular member via internal threads that are of opposite handedness as the internal threads of the second tubular member. A diopter lens is mounted in one of the first and second tubular members and movable therewith relative to the other of the first and second tubular members to adjust a diopter setting or focus of the optical device. Because the internal threads of the nut and the second tubular member have opposite handedness, the nut provides greater resistance to inward movement of the diopter lens than conventional locking diopter adjustments.
    Type: Grant
    Filed: April 23, 2021
    Date of Patent: November 8, 2022
    Assignee: Leupold & Stevens, Inc.
    Inventors: Curtis J. Kemper, Timothy J. Lesser
  • DIOPTER ADJUSTMENT FOR OPTICAL DEVICE WITH OVERLAPPING LEFT-HANDED AND RIGHT-HANDED THREADS
    Publication number: 20220341707
    Abstract: A diopter adjustment device for an optical device such as a riflescope includes a first tubular member having overlapping left-handed and right-handed external threads, a second tubular member has internal threads mated with either the left-handed or right-handed external threads of the first tubular member, and a stop nut threaded onto the first tubular member via internal threads that are of opposite handedness as the internal threads of the second tubular member. A diopter lens is mounted in one of the first and second tubular members and movable therewith relative to the other of the first and second tubular members to adjust a diopter setting or focus of the optical device. Because the internal threads of the nut and the second tubular member have opposite handedness, the nut provides greater resistance to inward movement of the diopter lens than conventional locking diopter adjustments.
    Type: Application
    Filed: April 23, 2021
    Publication date: October 27, 2022
    Inventor: Curtis J. Kemper