CPC C30B 15/30 (2013.01) [C30B 29/06 (2013.01); C30B 35/005 (2013.01); B21B 39/14 (2013.01); Y10S 117/911 (2013.01); Y10T 117/1032 (2015.01)] | 18 Claims |
1. A lift assembly for use in lifting a seed coupled to a cable, the assembly comprising:
a lift housing forming a cable exit port therein;
a drum positioned within the lift housing, the drum forming a helical groove about an exterior surface of the drum, the drum extending from a first end to a second opposing end, the drum being rotatable around a central axis and translatable along the central axis;
a roller guide mounted to the lift housing and rotatable about a roller guide axis, wherein the roller guide engages at least a portion of the helical groove of the drum, the roller guide axis being parallel to and offset from the central axis, the roller guide being fixed from translating along the central axis; and
a drive shaft coupled to the drum and configured to cause the drum to rotate, wherein rotation of the drum causes the drum to translate via an engagement of the helical groove of the drum with the roller guide.
|