String trimmer head

A string trimmer comprising:

• a shaft;
• a handle positioned on the shaft and including a grip graspable by a user;
• a motor housing positioned on the shaft;
• a motor positioned within the motor housing and defining a drive shaft;
• and
• a trimmer head removably coupled to the drive shaft, the trimmer head including
• a housing including a main body and a cap defining a cavity and rotatable about a rotational axis,
• a spool supported in the cavity and operable to support line to be dispensed,
• a retainer positioned between the cap of the housing and the spool, the retainer including a ring, a first series of teeth extending from an upper surface of the ring towards the cap, and a second series of teeth extending from a lower surface of the ring towards the spool, and
• a nut positioned within the spool and drivingly coupled to the drive shaft.

A trimmer head for use with a string trimmer including a drive shaft, the trimmer head comprising:

• a housing rotatable about a rotational axis, the housing including:
• a main body defining a cavity, and
• a cap defining a first surface and a second surface opposite the first surface, wherein the second surface includes a first plurality of teeth;
• a spool supported in the cavity and operable to support line to be dispensed, the spool is drivingly coupled to the drive shaft, wherein the spool includes:
• a central portion extending along the rotational axis,
• a first flange proximate one end of the central portion and including a second plurality of teeth, and
• a second flange proximate an opposite end of the central portion;
• and
• a retainer positioned between the housing and the spool, the retainer including a ring, a first series of teeth extending from an upper surface of the ring towards the cap, and a second series of teeth extending from a lower surface of the ring towards the spool.