Bi-directional trimmer head spool with curved trimmer line guide
US8025249B2 · kind B2 · utility
34Cited by
32References
12Claims
0Family size
Inventors
Key dates
| Filing date | Nov 16, 2007 |
| Grant date | Sep 27, 2011 |
| Priority date | — |
| Expiry date | Jul 12, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49826
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In an embodiment, a spool for a trimmer head has a structure for guiding the trimmer line around a region for a driveshaft. In an embodiment, a component (e.g., a turn knob or a stop) is attached to the spool so that after determining the orientation in which to install the spool, the user is unlikely to install the spool in another orientation, even though the spool is invertible. In an embodiment, the turn knob also includes a structure that allows the turn knob to be used as a tool (e.g., as a wrench or screw driver) that facilitates disassembling the trimmer head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.