Pivot posts and trimmer heads utilizing the same
US10398078B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2015 |
| Grant date | Sep 3, 2019 |
| Priority date | — |
| Expiry date | Jan 24, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D34/4166
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A trimmer head having at least two pivoting line holders for holding multiple folded strips of trimming line is presented wherein said pivoting line holders are retained within said housing between said housing and said cover and extend upward through apertures in said cover, said line holders being capable of movement around a vertical axis of rotation, at least three embodiments are disclosed which provide a rounded landing for supporting the inner radius of a folded strip of trimming line, the rounded geometry of the landing prevents line stress and breakage, the various embodiments include a pivot post having two parallel straight through holes with a rounded vertical wall between the through holes, a single open passageway having a center metal post, and a single open passageway having a series of at least two metal pins through the center of the passageway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.