Easy to load trimmer head with forced discharge
AssigneeShakespeare Company
InventorDavid Skinner
Life of this patent
Estimating the term…
Abstract
A trimmer head for a trimmer having a shaft defining a rotation axis is provided. The trimmer head includes a housing including a main housing and a lower cover, wherein the main housing contains a pair of opposed eyelets through which trimmer line is discharged. A spool is encased within the housing, with a bump knob connected thereto, and has a passageway with opposed ends and extending from one side of the spool to another, the opposed ends being alignable with the eyelets to receive the line. A first set of ramps is located on an inside surface of the main housing and a second set of ramps is located within a center barrel of the spool. The two sets of ramps interact to control the direction of releasing line from the trimmer head and forcing indexing of the spool when the bump knob is bumped.
Claims13
A bump-activated trimmer head for utilizing wound trimmer line to cut vegetation, the trimmer head comprising:
- a housing configured to be attached to a rotary shaft of a rotary trimmer, the housing including a main housing and a lower cover, wherein a sidewall of the main housing contains at least a pair of opposed eyelets through which the trimmer line is discharged for cutting the vegetation;
- a spool encased within the housing and having a passageway for the trimmer line, the passageway having opposed ends that align with the opposed eyelets of the main housing and extending from one side of the spool to an opposite side of the spool;
- a bump knob mechanism operatively connected to the spool;
- a line channel cover inserted within a center barrel of the spool, wherein the line channel cover contains an internal line channel passageway that aligns with the passageway of the spool to allow for easy threading of the trimmer line;
- and
- two sets of a plurality of ramp projections, wherein a first set of the two sets of the plurality of ramp projections is located on an inside surface of an upper wall of the main housing and a second set of the two sets of the plurality of ramp projections is located on the line channel cover inserted within the center barrel of the spool, and wherein the two sets of ramp projections slide against each other to force the indexing of the spool when the bump knob mechanism is bumped against the ground thus forcing a length of the trimmer line from the trimmer head.
Dependencies are inferred from the claim text.