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US 5,323,592 AGranted
Duffer with improved lug configuration
AssigneeDeere & Company
InventorsDonald K. Davenport, Joel M. Schreiner
Life of this patent
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AssigneeDeere & Company
InventorsDonald K. Davenport, Joel M. Schreiner
Estimating the term…
A doffer for use with a spindle type cotton harvester is provided which has non-radial lugs to provide a better distribution of stripping and unwrapping force components for enhanced doffing action. The leading edges of the lugs are curved and are angled with respect to the radial direction to provide a scissors action relative to the spindles as the doffer rotates for improved doffing and wear distribution. The lugs provide an immediate unwrapping component upon initial contact with the cotton-wrapped spindles, with less stripping action to reduce the amount of cotton forced between the spindles and the doffer. In another embodiment of the invention, lugs with different pitches are supported in alternating fashion so that the action of the lugs with the greatest pitch provide a large unwrapping force and the smaller pitched lugs provide a large stripping force. The rear portions of the lugs are curved for increased cotton throwing clearance.
In a cotton harvester row unit having a drum with spindles rotatable about spindle axes, a doffer adapted for mounting for rotation in doffing relationship with the spindles for unwrapping cotton from the spindles and pushing the cotton off the spindles, the doffer comprising:
In a cotton harvester having a revolving drum with rotating spindles rotating about spindle axes, the drum moving the spindles in spindle paths, a doffer mounted for rotation about a doffer axis, the doffer located adjacent the spindle paths and having a tangential velocity relative to the spindles which is greater than that of the spindles for unwrapping cotton from the spindles and pushing the cotton off the spindles, wherein the axes of spindles approach an attitude perpendicular to a radial line extending from the center of the doffer to the initial point of contact between the doffer and the spindles, and the axes of the spindles approach an attitude parallel to a radial line extending from the center of the doffer to the point on the circumference of the doffer that the spindles exit the doffer, the doffer comprising:
In a cotton harvester having a revolving drum with rotating spindles rotating about spindle axes, the drum moving the spindles in spindle paths, a doffer mounted for rotation about a doffer axis, the doffer located adjacent the spindle paths and having a tangential velocity relative to the spindles which is greater than that of the spindles for unwrapping cotton from the spindles and pushing the cotton off the spindles, wherein the axes of spindles approach an attitude perpendicular to a radial line extending from the center of the doffer to the initial point of contact between the doffer and the spindles, and the axes of the spindles approach an attitude parallel to a radial line extending from the center of the doffer to the point on the circumference of the doffer that the spindles exit the doffer, the doffer comprising:
A doffer adapted for mounting for rotation in a preselected direction in doffing relationship with the spindles of a cotton harvester picker drum for removing cotton from the spindles, the doffer comprising:
Dependencies are inferred from the claim text.