Screw Patents (Class 291/33)
  • Patent number: 4162766
    Abstract: An auxiliary hopper is attached to the rear of a cinder spreading truck. The auxiliary hopper carries salt. The cinders and salt are discharged from their respective storage hoppers in predetermined proportions, are mixed and dumped onto a spreader for application to the roadway. A hydraulic control mechanism allows continuous variation of the proportions of salt and cinders in the mixture applied to the roadway.
    Type: Grant
    Filed: September 16, 1977
    Date of Patent: July 31, 1979
    Inventors: Dale K. Ten Broeck, Stanley N. Cuson, Hal K. Sorenson
  • Patent number: 4114932
    Abstract: A motor vehicle wheel track sanding device including a sand storage tank, a hopper mounted over a wheel of a motor vehicle, a pipe connecting the interior of the hopper to the storage chamber, an auger disposed within the pipe for transferring the sand from the storage tank to the hopper, and a motor for rotating the auger.
    Type: Grant
    Filed: July 5, 1977
    Date of Patent: September 19, 1978
    Inventor: Fred Freeberg