Damping spring for use in agricultural implements
US7322568B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 2005 |
| Grant date | Jan 29, 2008 |
| Priority date | — |
| Expiry date | Jan 11, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D78/14
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A damping spring assembly particularly but not exclusively useful for damping the motion of rake wheels in agricultural wheel rakes. The damping spring includes a pair of extended U-bolts and a coil compression spring. The extended U-bolts are connected to spring holder bushings which bear on the ends of the coil compression spring. As the coil compression spring is compressed, a constrained resilient damping rod located within the extended shafts of the extended U-bolts is likewise compressed in length and expands in diameter to bear against the extended shafts of the extended U-bolts, thus providing a damping action to prevent snapping back of the damping spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.