Patent ID: 7849538

Claim:
A height adjustable apparatus comprising: a deck; a first lever, said first lever comprising: a first lever deck arm connected to and supporting said deck; and a first lever interface arm having a first lever interface arm first end, a first lever interface arm second end and an interface between said first lever interface arm first end and said first lever interface arm second end, wherein the distance between said first lever interface arm first end and a variable point relative said interface defines a first lever interface arm effective length, wherein said first lever deck arm and said first lever interface arm are stationary relative each other; a second lever, said second lever comprising a second lever deck arm connected to and supporting said deck; and an actuator having an actuator first end and an actuator second end, wherein one of said actuator first end and said actuator second end is movably and pivotally connected to said first lever interface arm at said interface, and wherein movement of said one of said actuator first end and said actuator second end relative said interface controls said effective length of said first lever interface arm.