Patent ID: 6475082
Filing Date: 2002-11-05
Classification: A01F

Abstract:
A rotary threshing and separation unit for grain harvesting, comprising:a housing; means for receiving harvested crop and defining a feeding zone; a rotary driven threshing and separation rotor arranged in said housing and therewith defining a separation zone; a transport mechanism for transporting the harvested crop from the feeding zone to the separation zone; means operatively connected to the separation zone for exhausting chaff and defining a discharge zone; a sieve located at least partially within the separation zone; a grain collecting element arranged below the sieve; a fan for generating an air flow stream from at least the separation zone to the discharge zone; and at least one passage into the housing that communicates with a space between the sieve and grain collecting elements and wherein at least part of the air flow stream is generated from the passage and through the space between the sieve and grain collecting elements towards the fan.