String reel for a string trimmer, and string trimmer cutting head equipped with such a string reel or in the form of such a string reel
US11224162B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 9, 2017 |
| Grant date | Jan 18, 2022 |
| Priority date | — |
| Expiry date | Jan 21, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D34/4168
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A string reel (1) for being mounted on a cutting head of a string trimmer in a rotatable manner in mowing operation.The string reel (1) is constructed as an exchangeable wearing part, onto which a number of mowing string strands (2) is wound up, for example two mowing string strands (2), so that in mowing operation each free thread end is pulled radially outwards by centrifugal force and the piece of thread pulled outwards by the rotary movement in mowing operation and located at the free thread end can knock off plant stalks. The mowing string strands (2) have a greater length than the respective thread piece pulled outwards in mowing operation at the free thread end, so that the number of mowing string strands (2) can be pulled out at the free thread end after wear of the thread piece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.