Apparatus for cutting vegetation
US4168572A · kind A · utility
21Cited by
2References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1977 |
| Grant date | Sep 25, 1979 |
| Priority date | — |
| Expiry date | Jul 11, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D34/4163
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for cutting vegetation with a rotating head carrying a flexible, non-metallic cutting line wound on a rotatable spool with its free end extended radially into a cutting plane. An additional length of line is extended into the cutting plane by pushing the head against the ground to move inwardly a glide ball. The ball by a spiral ratchet rotates the spool in a predetermined angular displacement in the head. After the cutting line length is extended, the spool is secured automatically against further rotation within the head. Lengths of cutting line can be extended with the head rotating or stationary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.