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US 10,517,209 B2Granted
Quick loading trimmer head
AssigneeHusqvarna AB
InventorStefan Kullberg
Life of this patent
Estimating the term…
Abstract
A trimmer head for a hand-held cutting device may include a first housing portion, a line holding assembly to hold and selectively release trimmer line, and a second housing portion operably coupled to the first housing portion to house the line holding assembly. The line holding assembly may include a spool configured to hold the trimmer line and a core operably coupled to the spool. The line holding assembly may be configured such that rotational movement of the core causes corresponding movement of the spool, but movement of the core in an axial direction does not cause corresponding movement of the spool.
Claims31
A hand-held cutting device comprising:
- an elongated member graspable along a portion thereof by an operator;
- a trimmer head disposed at one end of the elongated member and configured to be rotatable to perform a cutting function using trimmer line held at a portion of the trimmer head;
- and
- a power unit operably coupled to the trimmer head to selectively cause rotation of the trimmer head,
- wherein the trimmer head comprises:
- a first housing portion;
- a line holding assembly to hold and selectively release the trimmer line;
- and
- a second housing portion operably coupled to the first housing portion to house the line holding assembly,
- wherein the line holding assembly includes a spool configured to hold the trimmer line operably coupled to the spool,
- wherein the line holding assembly is configured such that the spool is operably coupled to a core, the core comprising a first surface facing in an axial direction and a second surface facing in a direction opposite of the first surface, the first surface comprising a first slide projection and the second surface comprising a second slide projection,
- wherein the spool and core are rotationally fixed relative to each other responsive to any rotational movement of the core and as the spool slides relative to a third surface of the core when the core moves in the axial direction such that the trimmer line is released from the spool in response to tapping the core on a work surface, and
- wherein the second slide projection is engageable with a detent on the second housing portion to prevent movement of the core relative to the second housing portion, and
- wherein in response to the tapping the core on the work surface, the second slide projection disengages from the detent of the second housing portion to allow the core to rotate relative to the second housing portion.
11 more elements
A trimmer head for a hand-held cutting device, the trimmer head comprising:
- a first housing portion;
- a line holding assembly to hold and selectively release trimmer line;
- and
- a second housing portion operably coupled to the first housing portion to house the line holding assembly,
- wherein the line holding assembly includes a spool configured to hold the trimmer line and a core operably coupled to the spool, the core comprising a first set of slide projections and a second set of slide projections, the second set of slide projections being spaced apart from the first set of slide projections in an axial direction,
- wherein the spool and core are rotationally fixed relative to each other responsive to any rotational movement of the core and as the spool slidably engages a surface of the core when the core moves in the axial direction such that the trimmer line is released from the spool in response to tapping the core on a work surface, and
- wherein a slide projection of the second set of slide projections is engageable with a detent on the second housing portion to prevent movement of the core relative to the second housing portion, and wherein in response to the tapping the core on the work surface, the slide projection of the second set of slide projections disengages from the detent of the second housing portion to allow the core to rotate relative to the second housing portion.
4 more elements
A hand-held cutting device comprising:
- an elongated member graspable along a portion thereof by an operator;
- a trimmer head disposed at one end of the elongated member and configured to be rotatable to perform a cutting function using trimmer line held at a portion of the trimmer head;
- and
- a power unit operably coupled to the trimmer head to selectively cause rotation of the trimmer head,
- wherein the trimmer head comprises:
- a first housing portion;
- a line holding assembly to hold and selectively release the trimmer line;
- and
- a second housing portion operably coupled to the first housing portion to house the line holding assembly,
- wherein the line holding assembly includes a spool configured to hold the trimmer line operably coupled to the spool,
- wherein the line holding assembly is configured such that the spool is operably coupled to a core,
- wherein the spool and core are rotationally fixed relative to each other responsive to any rotational movement of the core and as the spool slides relative to a surface of the core when the core moves in an axial direction, and
- wherein the core comprises a line channel extending through the core in a radial direction to receive the trimmer line fed through the core.
10 more elements
Dependencies are inferred from the claim text.