Patents by Inventor James Hamfeldt

James Hamfeldt 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: 10352668
    Abstract: A mortar ammunition round which contains at least three fragment producing regions covered by a threadably removable aluminum cowling. Detachment of the cowling provides access to several of the fragment producing regions which are located on a removable cup device. A different cup device may then be selectively inserted and the cowling replaced, forming a new mortar round of different select performance capabilities.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: July 16, 2019
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Ryan Hooke, Frank Munoz, Jack Pincay, James Hamfeldt, Jeffrey R. Kraft, Gregory Nieradka, Eugene Schlenk, Donna Snyder, Brett Barnes, Andrew Maulbeck, Gordon Cheung, Tu-Nhi Nguyen, Oscar Ruiz, Mitchell Stolk, Gerard Voorhis
  • Patent number: 8220395
    Abstract: A Dual Purpose Improved Conventional Munition (DPICM) bomblet may be converted into a gun-launched grenade. The bomblet may include a fuze, a shaped-charge liner, a casing, and explosive material disposed between the shaped-charge liner and the casing. An ogive may be attached to an open end of the bomblet. A generally cup-shaped pusher may be placed over the fuze and attached to the bomblet casing. A conventional cartridge case assembly may be fixed to a fuze end of the bomblet. When the gun-launched grenade impacts a target, the casing may shatter to form shrapnel and a shaped-charge jet may be formed.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: July 17, 2012
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Ryan Gorman, Philip Magnotti, James Grassi, Matthew Millar, James Hamfeldt