Concave safety door with sealing and features latching features

Details Concave safety door with sealing and features latching features Concave safety door with sealing and features latching features

A - Human Necessities

01

F

130/24

A01F 12/00 (2006.01) A01F 12/16 (2006.01)

Patent

CA 1131536

CONCAVE SAFETY DOOR WITH SEALING AND LATCHING FEATURES ABSTRACT OF THE DISCLOSURE 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 overlapping relation to one end of main body of the safety door with a free end loosely connecting with the leading edge of the concave and includes a flexible sealing element in engage- ment with the adjacent vertical wall. The rear ends of the seal structures and safety door rest on and move up and down with the front of the concave when the latter is adjusted to change the clearance between the concave and the threshing rotor. The seal structures also serve as stops to limit upward swinging movement of the safety door at the time it is closed to its operating position.

364915

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