公开(公告)号：US5314166A

公开(公告)日：1994-05-24

申请号：US69448

申请日：1993-06-01

申请人： Robert J. Muir

发明人： Robert J. Muir

IPC分类号： B66D1/72 ,  B66D1/74 ,  B66D5/34 ,  B66D1/30

CPC分类号： B66D1/72 ,  B66D1/7415 ,  B66D1/7494 ,  B66D5/34

摘要： A which winch can permit free-fall is disclosed, which includes a shaft adapted to be driven by a source of power, a first cone connected about the shaft to be driven therewith, and a second cone co-axial with the first cone and movable axially relative thereto. The second cone can be caused to assume one of two axial positions relative to the first cone, the arrangement being such that a rope or chain passing between the two cones can be driven by the winch when the second cone is in one of its two positions and can free-fall when the second cone is in the other of its two positions.

摘要翻译： 公开了一种可以允许自由落体的绞盘，其包括适于由动力源驱动的轴，围绕待驱动的轴连接的第一锥体和与第一锥体同轴并且可移动的第二锥体 与其轴向相对。 可以使第二锥体相对于第一锥体呈两个轴向位置之一，该布置使得当第二锥体处于其两个位置中的一个位置时，通过绞盘可以驱动在两个锥体之间通过的绳索或链条 并且当第二锥体在其两个位置中的另一个位置时可以自由下落。