Closing mechanism for a harvester safety door
US4262679A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 27, 1980 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Mar 27, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01F12/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A pivoted safety door for a harvester is disposed ahead of the concave and has a separately pivoted lip which normally rests on a front edge of the concave. An adjustably biased detent mechanism releases the lip, permitting it to pivot out of engagement with the concave, when a rock or the like of substantial size attempts to enter the threshing chamber and is engaged by the threshing rotor. A first manual control is provided for pivoting the main body of the door from its tripped position to a closed position. A second manual control is provided for pivoting the lip relative to the door to restore it to its detented position, this last mentioned function being effected after the main body of the door has been restored to a closed position. The detent mechanism for the lip includes a pair of adjustably loaded spring biased plungers which act on opposite sides of a detented part. The laterally opposite ends of the safety door are sealed in relation to vertical walls of the harvester by a pair of special seal structures which are pivoted to the harvester coaxially with the main body of the safety door. The seal structures each include a rigid longitudinal sealing member in overlappin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.