Patent ID: 6843625

Claim:
A mobile base assembly for supporting equipment ( 18 ) for movement over a support surface ( 16 ), said assembly comprising: a frame ( 14 ); a plurality of wheels ( 12 ) attached to said frame ( 14 ) for movably supporting said frame ( 14 ) on the support surface ( 16 ); an anchor mechanism ( 10 ) for lifting said wheels ( 12 ) from the support surface ( 16 ) and anchoring said frame ( 14 ) to the support surface ( 16 ), said mechanism ( 10 ) comprising; at least one plate ( 20 or 22 ) attached to said frame ( 14 ), an anchor member ( 34 ) pivotally mounted on said plate for pivotal movement between an anchor position and a retracted position and presenting a foot flange ( 50 ), a foot ( 40 ) attached to said foot flange ( 50 ) of said anchor member ( 34 ) and having a base ( 42 ) for engaging the support surface ( 16 ) in said anchor position, a biasing member ( 60 ) for reacting between said plate and said anchor member ( 34 ) to bias said anchor member ( 34 ) to pivot to said retracted position, a lever ( 70 ) pivotally mounted on said plate for movement between said anchor and retracted positions, and a cam ( 72 ) on said lever ( 70 ) for engaging and pivoting said anchor member ( 34 ) against the biasing reaction of said biasing member ( 60 ) from said retracted position to said anchor position in response to said lever ( 70 ) being moved from said retracted position to said anchor position.