Folding hay rake with extension linkage
US6038844A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1998 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Jan 5, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D78/146
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A rake arm deployment spreader with two arms and an elbow member arrangement, optionally and preferably having a locking mechanism involving an overcenter arrangement of certain pivots, for deployment or retraction of a folding hay rake which is towable by a tractor. The hay rake has a primary towable frame with right and left secondary frames pivotally attached adjacent the rear of the primary frame. The deployment spreader assembly is pivotally attached to the primary and secondary frames for pivoting the secondary frame relative to the primary frame. The deployment spreader includes a telescopic arm and a leg and link to control the telescopic arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.