Patent ID: 9700810
Date: 2017-07-11
CPC Classifications: A63J,B66D

Claim:
1. A modular hoist system, comprising: a first length of drum disposed about a first drum shaft and having a first elongate member coupled at one end to the first length of drum; a first motor coupled by a spline shaft to the first drum shaft for imparting a rotational motion upon the first length of drum while permitting longitudinal motion of the first length of drum with respect to an axis of rotation of the first drum shaft, the elongate member winding about the first length of drum upon rotation of the first drum shaft in a first rotational direction; a batten encasing the first length of drum and having an opening therein for permitting the elongate member to emerge therefrom, the elongate member having a second end adapted to be fixed to an elevated support structure for supporting the hoist system, the batten having a longitudinal axis substantially parallel to the axis of rotation of the first length of drum, the batten having an internal diameter substantially similar to an external diameter of the first length of drum having spooled thereupon the elongate member, the first motor being disposed at a first end of the batten; an acme screw fixed to the batten and coupled to the first drum shaft for imparting the longitudinal motion on the first drum; an operative length of the hoist system being expandable by coupling a second drum shaft to the first drum shaft and disposing about the second drum shaft a second length of drum for rotation in unison with the first length of drum, for winding a second elongate member about the second length of drum upon rotation of the first and second lengths of drum.