Patents by Inventor Michael T. Madden

Michael T. Madden 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: 4999940
    Abstract: A weapon safety locking apparatus that has a flexible, longitudinally adjustable, locking rod, a chamber insert connected to one end of the rod and a breech block connected to the chamber insert. The apparatus has a locking means to lock the rod within the barrel of a weapon and a plurality of locking knuckles on the rod that the locking means grips when the locking means is in locking engagement with the rod. There is a muzzle cap an a chamber insert that have a tapered end to enable the apparatus to be used on various sizes of firearms. The locking rod, muzzle cap and chamber insert are made of a plastic material. The plastic material of the muzzle cap and the chamber insert has a surface with a low surface hardness to protect the muzzle and the chamber. The plastic material of the muzzle cap is elastically deformable and will return to its originally formed shape. The rod is inserted into the chamber and through the bore of the barrel.
    Type: Grant
    Filed: January 22, 1990
    Date of Patent: March 19, 1991
    Inventor: Michael T. Madden