Patent ID: 8321976

Claim:
A height adjustable apparatus comprising: a deck; a drag link; a first lever, said first lever comprising: a first lever first arm connected to said drag link; a first lever second arm connected to and supporting said deck; a first lever third arm comprising a first lever third arm interface, wherein said first lever first arm, said first lever second arm and said first lever third arm are stationary relative each other; a second lever, said second lever comprising: a second lever first arm connected to said drag link; and a second lever second arm connected to and supporting said deck, wherein said second lever first arm and said second lever second arm are stationary relative each other; 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 pivotally connected to said drag link, and the other of said actuator first end and said actuator second end is pivotally connected to said first lever third arm at said first lever third arm interface; and a control arm, said control arm having a control arm first end and a control arm second end, one of said control arm first end and said control arm second end being pivotally connected to said drag link, and the other of said control arm first end and said control arm second end controlling the location of said one of said actuator first end and said actuator second end relative said first lever third arm interface.