Apparatus for cutting vegetation
US4493151A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1982 |
| Grant date | Jan 15, 1985 |
| Priority date | — |
| Expiry date | Jun 25, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D34/4162
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Apparatus for cutting vegetation with a rotatable head carrying a non-metallic cutting line extended into a cutting plane. Additional line is extended from a supply line coil within the head into the cutting plane without independent operator action. A mechanism in the head automatically feeds replacement line whenever the free end of the cutting line is reduced to less than a predetermined maximum length in the cutting plane. The cutting line length is always extended to this predetermined maximum length at all operational rotational speeds, without adjustment, and in a positive step-by-step mode of segmental line advancement. The line feeder mechanism, has an escapement cam with an off center pivotal mounting that senses both centrifugal forces on the cutting line and changes in rotary speed of the head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.