Combined concave and rock door structure

Details Combined concave and rock door structure Combined concave and rock door structure

1984-03-26

1984-11-27

Hirsch, Paul J.

130 27L, A01F 1210, A01F 1216

Patent

active

044845880

ABSTRACT:
A combined concave and rock door structure is provided for an agricultural harvester wherein the rock door and the arms supporting the concave are pivotally mounted on the same transverse axis by a pair of pivot support structures. A control mechanism is provided for adjusting the threshing clearance of the concave and the concave is adjustable to maintain concentricity with the threshing rotor.

REFERENCES:
patent: 2083879 (1937-06-01), Thompson
patent: 2959175 (1960-11-01), Oberholtz et al.
patent: 3089299 (1963-05-01), Claas
patent: 3101721 (1963-08-01), Fuller
patent: 3124138 (1964-03-01), Claas
patent: 3552396 (1971-01-01), Gerhardt et al.
patent: 3756248 (1973-09-01), Mathews
patent: 3771530 (1973-11-01), Wassell
patent: 4262679 (1981-04-01), James
patent: 4271850 (1981-06-01), Ryczek

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