Patents by Inventor Sam E. Johnson

Sam E. Johnson 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: 4930396
    Abstract: The invention is an improved muzzle brake with the outer appearance of a perforated metal cylinder and an inner chamber composed of cylindrical sections, tapering sections, conical sections, and abrupt and gradual changes between the various sections. The brake is intended to be attached to the muzzle of a gun such as a rifle, pistol or shotgun. Holes running radially from the surface of the brake into the inner chamber divert a portion of the propelling gases away from the normal direction of such gases, resulting in a reduction in recoil. The holes are spaced about the surface of the brake along spirals. The use of many small regularly patterned holes results in a decrease in the perceived discharge noise.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: June 5, 1990
    Inventor: Sam E. Johnson
  • Patent number: 4922641
    Abstract: The present invention is an improved recoil pad for attachment to the butt end of a firearm's stock. A series of springs, preferably helical, are utilized to reduce the transfer of recoil energy to the shooter. Interior air is released through air channels to reduce the forces opposing compression of the recoil pad. Further, the pad utilized compressible foam to aid in overall compressibility.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: May 8, 1990
    Inventor: Sam E. Johnson
  • Patent number: 4610034
    Abstract: A thin flexible lightweight shoulder protection device for attachment to a shooter's garments to absorb rifle or similar firearm recoil loads. The device includes a flexible cover portion within which an energy absorbing pad is retained. One form of the pad includes a flexible sealed envelope which houses an internal solid polyurethane elastomer matrix which provides the device with its damping or energy absorbing capability. Alternate embodiments of the pad comprise an elastomer matrix formed with periodic recesses or depressions in the user facing surface, or with hollow compression chambers within the matrix, to provide an improved energy absorbing internal geometry to the device. Retention means are provided for removably locating and securing the device at desired garment locations.
    Type: Grant
    Filed: June 22, 1984
    Date of Patent: September 9, 1986
    Inventor: Sam E. Johnson
  • Patent number: 4455684
    Abstract: A thin flexible lightweight shoulder protection device for attachment to a shooter's garments to absorb rifle or similar firearm recoil loads. The device includes a flexible cover portion within which an energy absorbing pad is retained. The pad includes a flexible sealed envelope which houses an internal solid thermoplastic elastomer matrix which provides the device with its damping or energy absorbing capability. Retention means are provided for removably locating and securing the device at desired garment locations.
    Type: Grant
    Filed: September 7, 1982
    Date of Patent: June 26, 1984
    Inventor: Sam E. Johnson