Patents by Inventor Albert S. Grace

Albert S. Grace 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).

  • Weed and grass trimmer
    Publication number: 20080282554
    Abstract: A weed and grass trimmer has a cutting line which is fed as the weed trimmer is in use. The weed trimmer's cutting head includes a spool for cutting line, and a housing. The spool has flanges around its circumference, which may engage a corresponding upper or lower set of flanges in the housing. Actuation of a control located near the handle operates either a cable or a solenoid, causing the spool to reciprocate between the upper and lower flanges. The difference in centrifugal force and angular velocity during this reciprocation causes additional cutting line to be fed.
    Type: Application
    Filed: July 23, 2008
    Publication date: November 20, 2008
    Inventor: Albert S. Grace
  • Weed and grass trimmer
    Patent number: 7017272
    Abstract: A weed and grass trimmer has a cutting line which is fed as the weed trimmer is in use. The weed trimmer's cutting head includes a spool for cutting line, and a housing. The spool has flanges around its circumference, which may engage a corresponding upper or lower set of flanges in the housing. Actuation of a control located near the handle operates either a cable or a solenoid, causing the spool to reciprocate between the upper and lower flanges. The difference in centrifugal force and angular velocity during this reciprocation causes additional cutting line to be fed.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: March 28, 2006
    Inventor: Albert S. Grace
  • Weed and grass trimmer
    Publication number: 20040148784
    Abstract: A weed and grass trimmer has a cutting line which is fed as the weed trimmer is in use. The weed trimmer's cutting head includes a spool for cutting line, and a housing. The spool has flanges around its circumference, which may engage a corresponding upper or lower set of flanges in the housing. Actuation of a control located near the handle operates either a cable or a solenoid, causing the spool to reciprocate between the upper and lower flanges. The difference in centrifugal force and angular velocity during this reciprocation causes additional cutting line to be fed.
    Type: Application
    Filed: December 30, 2003
    Publication date: August 5, 2004
    Inventor: Albert S. Grace