Folding wheel rake with improved folding mechanism
US6405517B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2000 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Jun 23, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D78/144
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An economical wheeled towable folding wheel rake of robust, largely welded construction utilizing a single hydraulic cylinder to fold two opposed wheel rake assemblies via a four bar linkage. The folding mechanism folds the opposed rake assemblies to a compact, symmetrical, easily locked, vertical orientation for shipping transit and storage. The folding mechanism is simple and utilizes few wearing pivots yet enables flotation of the opposed rake assemblies independent of one another and of the main frame of the wheel rake. The opposed wheel rake assemblies are independently adjustable in raking angle, raking width and raking down pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.