Deep tillage standard and bracket therefor
US5427183A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1993 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Nov 30, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B61/046
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A double spring reset standard and spring bracket therefor particularly useful for intermediate tillage operations at depths of approximately 13 inches wherein high average draft loads are in the range of 2000 pounds. The moment arm that the springs must resist to keep the standard from tripping during normal operation is minimized by bringing the draft force line closer to the standard pivot. The spring bracket which must be able to resist extremely high torsional stresses is fabricated from 0.375 inch thick metal blanks in a single cold die operation and includes offsets and specially designed edge flanges to reduce edge stresses at the offset bends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.