Patents by Inventor William H. Drysdale

William H. Drysdale 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: 4450770
    Abstract: The invention is an improved means for the efficient discard of multi-segt sabots. The invention consists of a ring-like mechanism that holds the aft end of the sabot segments in place around the projectile. The ring-like mechanism also serves to seal the interface between the sabot and the projectile. In operation, after the projectile and sabot exit from the muzzle of the launch device, the ring-like mechanism acts as a hinge device which causes the individual sabot segments to pivot about their aft extremity and finally discard as the pivot ring releases.
    Type: Grant
    Filed: January 31, 1983
    Date of Patent: May 29, 1984
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Richard D. Kirkendall, William H. Drysdale, Louis D. Kokinakis
  • Patent number: 4372217
    Abstract: A segmented sabot utilizes a double ramp configuration and a centrally poioned obturating band in alignment with the center of gravity of an in-bore projectile to improve the uniformity of the shear traction forces at the interface between the sabot segments and a subcaliber projectile, to reduce propellant gas blow-by and to enhance projectile in-bore and trajectory stability. The increased uniformity of shear traction forces between sabot and projectile interfaces and propellant gas self-sealing design permits a reduction in sabot weight of sufficient magnitude to increase the velocity of the projectile at the muzzle exit.
    Type: Grant
    Filed: May 12, 1980
    Date of Patent: February 8, 1983
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Richard D. Kirkendall, William H. Drysdale, Louise D. Kokinakis, Bruce P. Burns
  • Patent number: 4284008
    Abstract: A segmented sabot utilizes a double ramp configuration and a centrally poioned obturating band in alignment with the center of gravity of an in-bore projectile to improve the uniformity of the shear traction forces at the interface between the sabot segments and a subcaliber projectile, to reduce propellant gas blow-by and to enhance projectile in-bore and trajectory stability. The increased uniformity of shear traction forces between sabot and projectile interfaces and propellant gas self-sealing design permits a reduction in sabot weight of sufficient magnitude to increase the velocity of the projectile at the muzzle exit.
    Type: Grant
    Filed: April 12, 1979
    Date of Patent: August 18, 1981
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Richard D. Kirkendall, William H. Drysdale, Louise D. Kokinakis, Bruce P. Burns
  • Patent number: H1999
    Abstract: Kinetic energy projectiles including sabots having stiffened bourrelets which tune and improve shot performance. Shot dispersion for the projectiles is decreased by reducing adverse dynamic perturbations imparted to the projectiles during projectile launch. Reducing dynamic perturbations is accomplished by better controlling interior ballistics by changing the stiffness of the sabot bourrelets.
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: November 6, 2001
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: James F. Newill, Christopher P. R. Hoppel, William H. Drysdale