Patents by Inventor Lang-Mann Chang

Lang-Mann Chang 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: 5052302
    Abstract: A combustible bayonet type primer for combustible cannon cartridge cases comprises a primer head assembly adapted to be inserted in a cartridge case, a tubular housing made of a combustible material, an igniter strand axially disposed in said housing, and a confining means for confining one end of the igniter strand so that the initial ignition rate is about 1000 m/s. The ignited strand in turn ignites a black powder charge contained within a cloth bag within the tubular housing. The housing is an unpressurized container for the igniter strand and the black powder charge and is consumed during the burn of the propellant bed along with the igniter strand and the combustible case.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: October 1, 1991
    Assignees: Olin Corporation, United States Government Department of Defense
    Inventors: Ralph M. Taddeo, Robert W. Deas, Lang-Mann Chang, John Grosh