Patents by Inventor Hallvard Wintherseth

Hallvard Wintherseth 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).

  • Patent number: 12044495
    Abstract: A coaxial gas flow silencer for a firearm having an outer sleeve or cylinder forming an outer surface of the silencer and an inner sleeve or cylinder forming an inner surface of the silencer. Within the inner cylinder is a core portion having a bore through which a projectile will travel, and one or more expansion chambers for expanding exhaust gas from the firing of a cartridge. The space between the inner an outer cylinders forms a first passage for a first portion of exhaust gas, exiting the silencer through a number of radially arranged openings at a periphery of an end plate at the muzzle end of the silencer. The inner cylinder and core portion form a second passage for a second portion of exhaust gas exiting via the bore through a central opening in the face plate.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: July 23, 2024
    Assignee: A-TEc Holding AS
    Inventors: Anders Eckhoff Johansen, Hallvard Wintherseth
  • Publication number: 20220155034
    Abstract: The present invention relates to a silencer for a firearm, where the silencer comprises an attachment part and a muzzle part, where at least one intermediate module element is arranged between said attachment part and muzzle part, where each of said attachment part, at least one intermediate module element and muzzle part comprises an outer sleeve portion which outer sleeve portion form a part of an outer surface of the silencer, said at least one intermediate module element further comprises an inner sleeve portion and a core portion, which inner sleeve portion form a part of an inner surface of the silencer, said core portion comprising a throughgoing bore, said outer sleeve portion and inner sleeve portion being connected through a radial part, said radial part being provided with a plurality of throughgoing openings around its periphery, wherein, when the silencer is assembled, said outer sleeve portions and inner sleeve portions form a volume defining a first passage for exhaust gases, and said inner sle
    Type: Application
    Filed: March 19, 2020
    Publication date: May 19, 2022
    Inventors: Anders Eckhoff Johansen, Hallvard Wintherseth