Trimmer head for use in flexible line rotary trimmers
US6901667B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 2, 2003 |
| Grant date | Jun 7, 2005 |
| Priority date | — |
| Expiry date | Oct 16, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D34/4163
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved flexible line rotary trimmer head of the type adapted to be bumped against the ground to effect payout of predetermined lengths of cutting line and which is secured to the trimmer by a drive bolt having a non-circular head portion and a depending shaft portion. The trimmer head housing defines a tubular portion depending axially from the upper housing surface and having a particularly configured upper portion disposed about and creating an interference fit with the head portion of said drive bolt and a lower portion particularly configured to create an interference fit with the head portion of the cam member of the line feeding assembly. A slidable push retainer is carried by the shaft portion of the drive bolt adjacent the line feeding assembly for securing the assembly to the shaft portion of the drive bolt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.