Leaf and grass mulching attachment for lawn mowers
US4864808A · kind A · utility
Inventor
Key dates
| Filing date | Jan 27, 1989 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | Jan 27, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D2101/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A lawn mower attachment that allows the lawn mower to pulverize the lawn clippings into a mulch. The mulching attachment mounts over the opening to the discharge chute (90). It consists of equally spaced rods (30) that form a grid. This grid permits air to escape while filtering the mulched material. Each rod (30) is suspended such that it is free to rotate about its longitudinal axis, move vertically in response to the terrain, and pivot about the suspended end. The pivot motion is constrained in angular displacement so as not to decrease the mulching capability. The vertical, rotating, and pivoting motion of the rods act to cleanse the grid and return the residue for further trituration. Limiting the grid rod motion insures grid integrity thus insuring that only properly prepared residue escapes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.