Patents Assigned to Allegretti & Co.
  • Patent number: 4490910
    Abstract: An improved cutting head for a string trimmer, wherein a spool holding a length of flexible line is located on and driven by a motor drive shaft, and a housing over the spool is located on the drive shaft and driven by the shaft through the spool, this arrangement reducing the vibration experienced as the string trimmer is operated. The housing is attached to the drive shaft independently of the spool, allowing the spool to be quickly and easily changed, without the need for special tools, by unlocking and removing a hub portion of the housing, slipping the old spool from the drive shaft, slipping on a new spool, and reinstalling the hub.
    Type: Grant
    Filed: July 21, 1982
    Date of Patent: January 1, 1985
    Assignee: Allegretti & Co.
    Inventors: Charles A. Mattson, Richard J. Landy
  • Patent number: 4387852
    Abstract: A fertilizer spreader includes an attachment assembly for use with a portable hand-held air blower for entraining granular fertilizer or the like into the discharge air stream of the blower, whereby the fertilizer is broadcast by the air stream over a lawn or garden area. The attachment assembly comprises an adapter nozzle connected in-line with the discharge air stream of the blower and including a pressure port through which a portion of the discharge air stream is directed for passage through a pressure tube to a diffuser mounted within a portable fertilizer-receiving container near the bottom thereof. The diffuser turns the air stream upwardly within the container and divides the stream into a plurality of turbulent air flows for agitating and suspending particles in a localized region above the diffuser.
    Type: Grant
    Filed: September 11, 1981
    Date of Patent: June 14, 1983
    Assignee: Allegretti & Co.
    Inventors: Charles A. Mattson, James Michel, Anthony Domagalski