Patent ID: 6409291
Filing Date: 2002-06-25
Classification: A47B,E04B

Abstract:
An article of furniture comprising a frame and wheels for supporting the furniture, the wheels being moveable between a retracted position and extended position, in the retracted position the wheels being retracted within a base portion of the furniture and in the extended position the wheels extending from the base portion to support the weight of the furniture; and an over-center locking mechanism comprising a first pivot member pivotally coupled to the frame at a first pivot axis, and a second pivot member pivotally coupled to the first pivot member at a second pivot axis, the second pivot member also being pivotally coupled to an operating member at a third pivot axis, the first and third pivot axes being located on a common longitudinal axis and when moving between unlocked and locked configurations, the second pivot axis moves through said longitudinal axis to a position spaced from said longitudinal axis, said locking mechanism being operatively coupled with the wheels, for moving the wheels between the retracted and extended positions.