Patent ID: 8662477

Claim:
A scissors-type lift assembly comprising: a base; a platform, said lift assembly having elevated and lowered states in which said platform and said base are distant and proximate, respectively; a pair of first and second scissor arms each having upper and lower ends respectively coupled to said platform and said base, said pair of scissor arms pivotably connected to each other intermediate their respective upper and lower ends about a central pivot axis; a first pulley arrangement comprising at least one first pulley disposed about a first pulley axis; a second pulley arrangement comprising at least one second pulley disposed about a second pulley axis, said first and second pulley axes disposed in a pulley plane and having lateral movement relative to each other as said lift assembly is moved between its said elevated and lowered states, said pulley plane fixed relative to said base; a spool rotatable about an axis fixed to said base; and a unitary belt guided through a path defined only by said first and second pulleys and said spool, said belt having opposed first and second ends, said belt first end engaged with said spool onto which said belt is wound and from which said belt is unwound; said first and second pulley axes having a first lateral distance therebetween in said lift assembly elevated state and a second lateral distance therebetween greater than said first distance in said lift assembly lowered state, said first and second pulley axes pulled laterally together by said belt as it is wound onto said spool.