MOUNTAIN HOIST Russian patent published in 2011 - IPC B66B9/02 

FIELD: transport.

SUBSTANCE: proposed hoist is intended for construction and operation of high- and low-rise buildings, mountain and well structures. Proposed hoist comprises hollow post with lengthwise groove, screw moving inside said post engaged via support arranged in aforesaid groove with cargo gripper. Hollow post forms enclosed contour and is provided with thread turns. Gaskets are arranged between said screw turns screwed to post. Said screw with its top and bottom ends is articulated with extra screws, each being articulated with separated electric drive. Said screws have thrust taper rolls arranged in a helix. Additionally, there are top and bottom supports, each being coupled with its extra screw. All supports are articulated between themselves and with cargo gripper. With screws moving along curved sections of the post, aforesaid rolls displace to make invariable gap between post thread and rolls of screw coil line. This allows coupling the posts to make closed loop wherein screws with grippers moves in circle.

EFFECT: expanded operating performances.

11 dwg