Spool assembly for a trimmer head
AssigneeBlack & Decker Inc.
InventorsOleksiy SERGYEYENKO, Matthew ROSENTHAL
Life of this patent
Estimating the term…
Abstract
According to examples, a spool assembly includes a spool formed of a central section including a core wall containing a core and passages extending through the core wall, an upper flange located at an upper portion of the central section, a lower flange located at a lower portion of the central section, and a protrusion section integral with the central section and extending above the upper flange. The protrusion section includes a cutout formed inside the protrusion section, the cut-out having a non-circular shape adapted to be securely engaged to a drive member of a motor.
Claims20
A spool assembly comprising:
- a spool formed of:
- a central section including a core wall containing a core and passages extending through the core wall;
- an upper flange located at an upper portion of the central section;
- a lower flange located at a lower portion of the central section;
- and
- a protrusion section integral with the central section and extending above the upper flange, the protrusion section including a cut-out formed inside the protrusion section, the cut-out having a non-circular shape adapted to be securely engaged to a drive member of a motor.
A string trimmer head comprising:
- a spool coupled to a drive member of a string trimmer and to be continuously rotated with the rotation of the drive member around an axis, the spool including:
- a central section formed of a core wall around a core and passages extending through the core wall;
- an upper flange located at an upper portion of the central section;
- and
- a lower flange located at a lower section of the central section;
- an end cap inserted into an opening to the core, the end cap having a protrusion that extends from one side of the end cap to the other side of the end cap and includes a passageway that is aligned with the passages in the core wall;
- a spool housing surrounding the spool and to releasably engage the spool, wherein the spool housing is to rotate with the spool when engaged with the spool and to not rotate with the spool when disengaged from the spool, the spool housing including an eyelet through which a line wound around the spool is to extend;
- and
- a spring to control the releasable engagement between the spool housing and the spool, wherein the spring is to bias the spool housing away from the spool.
A string trimmer comprising:
- a pole having a handle on a first end and a trimmer head assembly on a second end, the trimmer head assembly having a motor with a drive member;
- the drive member fixedly connected to a spool through a fastener having a head, the spool having a protrusion section integral with and extending from a central section, the protrusion section having a cut-out formed in the interior of the protrusion section and having a complementary shape to the fastener head to cause the spool to be continuously rotated with the rotation of the drive member around an axis, the spool also including a central section formed of a core wall around a core and passages extending through the core wall on opposites sides of the core;
- a spool housing surrounding the spool and to releasably engage the spool, wherein the spool housing is to rotate with the spool when engaged with the spool and to not rotate with the spool when disengaged from the spool, the spool housing including an eyelet through which a line wound around the spool is to extend;
- and
- a spring to control the releasable engagement between the spool housing and the spool.
Dependencies are inferred from the claim text.