Patent ID: 6261176
Filing Date: 2001-07-17
Classification: A01F

Abstract:
A threshing mechanism for a combine, comprising:an enclosed cylinder having a longitudinal axis of rotation, and a cylindrical outer periphery and closed ends that define a closed space surrounding the longitudinal axis of rotation, the closed space being substantially impervious to crop material;a plurality of mounting structures secured to said cylindrical outer periphery of the enclosed cylinder at circumferentially spaced positions, said mounting structures each having a mounting face positioned radially outwardly from said outer periphery;a plurality of rasp-type bars secured to said mounting faces and extending along a length of said enclosed cylinder;said rasp-type bars each comprises a base portion and a plurality of teeth evenly spaced along a length of said base portion and extending therefrom, said teeth having leading edges that are sloped rearwardly and radially outwardly relative to a direction of rotation at an angle of less than 15 degrees from a radial line passing through said axis of rotation;said teeth each have a height from said base portion to a tip of said teeth that is substantially constant from leading edges of the teeth to trailing edges thereof; andsaid mounting structures each have a sloped front surface that slopes outwardly and rearwardly relative to a direction of rotation to guide crop material toward said rasp-type bars.