Patents by Inventor Clarence M. Helfrich

Clarence M. Helfrich 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: 4486972
    Abstract: An animal trap utilizes a generally X-shaped base to provide a balanced mounting of a pair of U-shaped jaws, a pair of torsion coil springs, and elements of a trigger mechanism. When the trap is set, the jaws are pivoted downwardly relative to the base and lie in a horizontal planesurrounding a trigger pan, whereby the set trap is of minimal height. A means of adjustment is provided to enable the force required to operate the trigger pan to be adjusted through a wide range to accommodate the trap for use with a wide variety of animals. Mounting rods extend through two spaced coiled portions of each of the torsion coil springs to couple the springs securely to the base. The springs have U-shaped leg portions which engage sides of the jaws and bias the jaws toward their closed position. The U-shaped leg portions wedge the jaws together as the jaws approach their closed position, and prevent the jaws from being moved apart by a trapped animal.
    Type: Grant
    Filed: November 23, 1981
    Date of Patent: December 11, 1984
    Inventors: Clarence M. Helfrich, James C. Helfrich