Trimmer head for use in flexible line rotary trimmers having improved line loading mechanism
US7581322B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 30, 2007 |
| Grant date | Sep 1, 2009 |
| Priority date | — |
| Expiry date | Oct 30, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D34/4163
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A trimmer head for use in a flexible line rotary trimmer including a housing adapted to be operatively connected to the trimmer to effect rotation of the head and a spool operatively connected to the housing for rotation therewith. The spool defines at least one inwardly extending line receptor channel defining surface irregularities therein for securely gripping the cutting line upon an end portion of the line being inserted in the channel and the spool rotated with respect to the housing. The channel is preferably tapered inwardly to hold different line sizes. To provide uniform winding of the line about the spool, the operative connection between the spool and the housing effects relative reciprocal motion therebetween when the spool is manually rotated relative to the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.