Cutter blade assembly for weed and grass trimmers
US4300336A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1979 |
| Grant date | Nov 17, 1981 |
| Priority date | — |
| Expiry date | Sep 10, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D34/733
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A lawn trimmer has a cutting blade that is formed entirely of a flexible elastomer material, such as polyurethane. The cutting blade is a generally flat, circular plate, having a rim and a plurality of cutting teeth extending outwardly from the rim. The rim has an outer diameter, with the teeth extending outwardly from the outer diameter, and an inner diameter which defines a central opening. A securing plate is used to mount the cutting blade to the lawn trimmer. The securing plate has a central portion secured to the lawn trimmer and an outer portion that overlies the rim of the cutting blade. Various embodiments are disclosed for fixedly attaching the securing plate to the rim of the cutting blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.