Patents by Inventor Larry Albert Willis

Larry Albert Willis 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).

  • Universal Headspace Gauge
    Publication number: 20100122468
    Abstract: This apparatus is designed to accurately measure or compare loaded or unloaded ammunition cartridges of all shapes and sizes. It measures between the base of a cartridge and any of its flat or tapered surfaces above. This apparatus is comprised of an adjustable v-block that is secured to the stem of a digital or mechanical indicator that is mounted on a vertical shaft above a flat pedestal. As the v-block and stem are raised, a cartridge case is then positioned between the v-block and the pedestal of this apparatus. The cartridge can then be engaged by lowering the v-block to contact any upper location on a cartridge. After this v-block rests on any upper location of a cartridge, the indicator is then reset to zero. The indicator is then prepared to measure or compare the difference of each cartridge in relation to its base. The measurement from the cartridge shoulder to its base is known as headspace. The measurements taken from the bullet back toward the base will reveal variations in bullet seating depth.
    Type: Application
    Filed: November 14, 2008
    Publication date: May 20, 2010
    Inventor: Larry Albert Willis
  • Universal headspace gauge
    Patent number: 7716845
    Abstract: This apparatus is designed to accurately measure or compare loaded or unloaded ammunition cartridges of all shapes and sizes. It measures between the base of a cartridge and any of its flat or tapered surfaces above. This apparatus is comprised of an adjustable v-block that is secured to the stem of a digital or mechanical indicator that is mounted on a vertical shaft above a flat pedestal. As the v-block and stem are raised, a cartridge case is then positioned between the v-block and the pedestal of this apparatus. The cartridge can then be engaged by lowering the v-block to contact any upper location on a cartridge. After this v-block rests on any upper location of a cartridge, the indicator is then reset to zero. The indicator is then prepared to measure or compare the difference of each cartridge in relation to its base. The measurement from the cartridge shoulder to its base is known as headspace. The measurements taken from the bullet back toward the base will reveal variations in bullet seating depth.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: May 18, 2010
    Inventor: Larry Albert Willis