Jack stand for wire spools

摘要

An apparatus and associated method for lifting a workpiece. An upright frame operably supports a lead screw for selective rotation. A carrier threadingly engages the lead screw so that rotation of the lead screw in one rotational direction linearly advances the carrier in a lifting direction and rotation of the lead screw in the opposite rotational direction linearly advances the carrier in a lowering direction. A mechanical power inlet is adapted for receiving an input torque from a user. A mechanical power transmission assembly has a first gear fixed in rotation with the mechanical power inlet and a different second gear fixed in rotation with the lead screw, the first and second gears sized so that the input torque imparted on the first gear is less than an output torque imparted by the second gear to the lead screw.

主权项

1. An apparatus for lifting a workpiece, the apparatus comprising:
an upright frame; a lead screw supported by the frame for selective rotation; a carrier threadingly engaging the lead screw, the carrier comprising
a web member;a first guide roller attached to the web member for rolling engagement against one side of the support rail;a second guide roller attached to the web member for operable rolling engagement against an opposing side of the support rail;a threaded follower attached to the web member and threadingly engaging the lead screw; anda support arm extending from the web and sized to operably and matingly engage the workpiece for lifting the workpiece; wherein rotation of the lead screw in one rotational direction linearly advances the carrier in a lifting direction and rotation of the lead screw in the opposite rotational direction linearly advances the carrier in a lowering direction; a mechanical power inlet adapted for receiving an input torque from a user; and a mechanical power transmission having a first gear fixed in rotation with the mechanical power inlet and a different second gear fixed in rotation with the lead screw, the first and second gears sized so that the input torque imparted on the first gear is less than an output torque imparted by the second gear to the lead screw.