Mulching blade including multiple cutting edges
US5353581A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1993 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | Feb 2, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D34/73
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A grass or vegetation cutting blade is provided, which includes multiple cutting edges, including a leading cutting edge positioned below a trailing cutting edge. An upturned foil is provided behind the leading edge, such that grass initially cut by the leading edge is directed upwardly by the foil toward the trailing edge, to be cut in midair. An inturned spur is provided, which provides inward air and clipping flow toward the rotational axis of the blade. The blade is contemplated for use in conventional side- or rear-discharging housings, as well as mulching or recycling housings. The blade is resistant to clogging, and includes power-efficient properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.