Patents by Inventor John N. Majerus

John N. Majerus 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: 4499830
    Abstract: A shaped-charge warhead increases the lethality of the liner material by roducing a lethal material into an appropriate region of a jet penetrator so that the lethal material is projected on the shot-line ahead of a normally large slow-moving slug, or rearward portions of the stretching jet penetrator, without hindering the actual penetration process of an outer vehicle armor. The improved shaped-charge liner eliminates the necessity of using naturally pyroforic material or poisonous liquids.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: February 19, 1985
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: John N. Majerus, William P. Walters
  • Patent number: 4359943
    Abstract: A shock-wave-reflecting surface and low density matter or gas within the ntal ogive of a shaped charge warhead ahead of the concave liner thereof modifies the speed and consequent distribution of particles in the stretching jet to improve armor penetration capability.
    Type: Grant
    Filed: September 2, 1980
    Date of Patent: November 23, 1982
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: John N. Majerus
  • Patent number: 4342261
    Abstract: Mechanical interference between a cast explosive material and a casing prnts rotation of the cast explosive material during machining thereof and improves symmetry and performance of the shaped-charge warhead. The cast explosive material may be keyed to the casing by flowing portions of the explosive material into a plurality of cavities in the casing before curing. Alternatively, pins may extend inward from the casing into the explosive material which surrounds them when cast and resists relative motion therebetween when cured. Alternatively, the explosive material may be pre-cast into an appropriate shape, cured and pressed into the casing. Protuberances to fit into holes in the casing or indentations to fit over pins extending into the casing may be formed on the pre-cast explosive. Engagement between the protuberances or indentations and the holes or pins respectively is attained when the explosive material is pressed into the casing.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: August 3, 1982
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: John N. Majerus