Lawn trimmer
US4254550A · kind A · utility
17Cited by
5References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 16, 1979 |
| Grant date | Mar 10, 1981 |
| Priority date | — |
| Expiry date | Aug 16, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D34/4167
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A lawn trimmer comprises a housing fixed to a rotating shaft and containing a spool therein and a stub shaft threadedly received in the rotating shaft. A support member is provided for holding the spool against the housing and fixedly secured to said stub shaft. A ground engaging disc is rotatably mounted on the stub shaft and connected to the support member by means of spring loaded centrifugal elements during stoppage of the trimmer. During rotation of the trimmer, the centrifugal elements function to free connection between the disc and the support member by being subjected to the centrifugal force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.