Spring mounted standard assembly
US4463813A · kind A · utility
10Cited by
8References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1981 |
| Grant date | Aug 7, 1984 |
| Priority date | — |
| Expiry date | Dec 2, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B35/24
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A spring trip standard assembly for a chisel plow or the like, the standard assembly having a compact single coil spring structure with a trip geometry producing a high initial trip force and a reduced maximum to initial trip force ratio. The horizontal trip force remains above the initial trip force through greater than half the trip height and then the trip force decreases. By reduction of the ratio of maximum to initial trip force, a heavy duty standard assembly is provided which may be used on lightweight tool frames originally designed for high trip force ratio standards having lower initial spring trip forces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.