US 4,284,086 AGranted

Threshing and separating apparatus

OwnerDennis W. Williamsinventor

Life of this patent

Estimating the term…

Loading patent…

Abstract

A threshing unit is arranged in a concentrically spaced relation within a perforated rotatable grain separating cylinder. An elongated axially fluted impeller located below the threshing unit and within the separating cylinder accelerates the speed of travel of the threshed material to substantially the peripheral speed of the separating cylinder to reduce grain cracking and fracturing. The grain is centrifugally separated through the separating cylinder for removal by a clean grain auger located therebelow and the chaff is discharged by air flowing axially between the threshing unit and the separating cylinder. Tailings from the threshing unit are moved rearwardly along the inner peripheral surface of the separating cylinder for pickup and return to the threshing unit. A pair of oppositely arranged axially extended nozzle units direct concentrated blasts of air inwardly of the separating cylinder to lift the chaff and grain from the inner peripheral surface thereof whereby to continuously clean the cylinder perforations for clean grain travel therethrough.

Claims8

Dependent claims

Apparatus for threshing a grain material and separating the threshed grain from the residual grain material comprising:

(a) an elongated supporting frame,
(b) a threshing unit including a rotatable threshing cylinder and an associated combination concave and grate member mounted on said frame to form with the threshing cylinder a threshing zone having an inlet and an outlet,
(c) means for supplying the grain material to be threshed into the inlet of said threshing zone,
(d) a shroud on said frame enclosing said threshing unit and having an outlet extended axially of said threshing cylinder,
(e) a rotatable grain separating cylinder having perforations in the peripheral surface thereof,
(f) means for rotatably supporting said separating cylinder on said frame and about said shroud in a coaxial relation with said threshing cylinder to form with said shroud a chamber for receiving threshed material from said axially extended outlet for rotation with said separating cylinder, with the grain rotatable with said separating cylinder being moved by centrifugal force through the perforations therein,
(g) means for agitating the threshed material rotating with said separating cylinder to maintain open the perforations therein,
(h) means for removing chaff and light material from said receiving chamber, and
(i) means for collecting and removing the clean grain discharged from the perforations in said separating cylinder.

6 more elements

Dependencies are inferred from the claim text.