Plural Separator Sets Of With Articulated Elements Patents (Class 171/75)
  • Patent number: 5351761
    Abstract: A farm tractor field stone collection implement is provided with a forward dragbox section having open forward and aft ends, a perforated bottom, multiple spaced-apart teeth projected forwardly and downwardly from the section leading edge, and hitch points for coupling to a farm tractor implement hitch accessory, with an aft dragbox section having a forward open end aligned with the forward dragbox section open aft end, a perforated bottom, and an aft end from which collected field stone may be dumped, with a vibrator mounted on the forward dragbox section, and with fasteners joining the forward and aft dragbox sections in an articulated manner relative to each other.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: October 4, 1994
    Inventor: Clyde E. Henthorn