Patent ID: 9267639
Filing Date: 2016-02-23
CPC Classification: A47B,E05D,E05F,E05Y,F16M,G06F,H01H,Y10S,Y10T

Claim Text:
1. A lift mechanism, comprising: a fixed component having proximal and distal ends; a movable component disposed in sliding or rolling engagement with the fixed component, the engagement including a contracted configuration in which the movable component is disposed a minimum distance from the fixed component distal end and an expanded configuration in which the movable component is disposed a maximum distance from the fixed component distal end; a wheel pivotally supported by one of the components about a pivot axis, the wheel comprising a first pulley member and a cam member with an eccentric shape, the wheel having a rotational range of travel from a first angular orientation corresponding to the expanded configuration of the fixed and movable components to a second angular orientation corresponding to the contracted configuration of the fixed and movable components; an energy storage member; a second pulley member connected to the energy storage member; a first cable comprising a first end and a second end; wherein the first end is attached to the cam member, and the second end is connected to the fixed component; wherein the first cable is routed to engage the second pulley member and configured to bias the wheel to rotate in a first direction; and a second cable connecting the first pulley member to one of the components so that the wheel rotates when the movable component is moved relative to the fixed component.