Patents by Inventor Carl D. Calos

Carl D. Calos 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).

  • Shotgun barrel
    Patent number: 5394634
    Abstract: A short length shotgun barrel exhibiting high accuracy and reduced felt recoil, and providing for interchangeability of loads containing shot pellets and slugs. The barrel includes an elongated and tapered forcing cone, a backbored region between the muzzle and the forcing cone, and a muzzle region of smaller diameter than the backbored region. The nominal inside diameter of the barrel from the forcing cone to a point adjacent the muzzle is greater than the muzzle diameter, and the backbored region is roughened at the in proximity to the muzzle. The forcing cone is elongated and tapered down from the chamber toward the muzzle end of the barrel.
    Type: Grant
    Filed: December 8, 1993
    Date of Patent: March 7, 1995
    Assignee: Hans J. Vang
    Inventors: Hans J. Vang, Carl D. Calos
  • Shotgun barrel
    Patent number: 5272827
    Abstract: A short length shotgun barrel exhibiting high accuracy and reduced felt recoil, and providing for interchangeability of loads containing shot pellets and slugs. The barrel includes an elongated and tapered forcing cone, a backbored region between the muzzle and the forcing cone, venting ports positioned in the area of the muzzle, and a muzzle region of smaller diameter than the backbored region. The nominal inside diameter of the barrel from the forcing cone to a point adjacent the muzzle is greater than the muzzle diameter. Radially projecting ports are provided in the transition area of the backbored region near the muzzle end of the barrel, and the area surrounding the venting ports is roughened. The forcing cone is elongated and tapered down from the chamber toward the muzzle end of the barrel.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: December 28, 1993
    Inventors: Hans J. Vang, Carl D. Calos
  • Shotgun barrel
    Patent number: 5249385
    Abstract: A short length shotgun barrel exhibiting high accuracy and reduced felt recoil, and providing for interchangeability of loads containing shot pellets and slugs. The barrel includes an elongated and tapered forcing cone, a backbored region between the muzzle and the forcing cone, venting ports positioned in the area of the muzzle, and a muzzle region of smaller diameter than the backbored region. The nominal inside diameter of the barrel from the forcing cone to a point adjacent the muzzle is greater than the muzzle diameter. Radially projecting ports are provided in the transition area of the backbored region near the muzzle end of the barrel, and the area surrounding the venting ports is roughened. The forcing cone is elongated and tapered down from the chamber toward the muzzle end of the barrel.
    Type: Grant
    Filed: March 24, 1992
    Date of Patent: October 5, 1993
    Inventors: Hans J. Vang, Carl D. Calos