Abstract: An apparatus comprising a cantilever having a distal end and a proximate end, a frame portion coupled to the distal end, a base portion coupled to the proximate end, and a locking apparatus coupled to the frame portion, the base portion, or the cantilever, wherein the locking apparatus has a locked position and an unlocked position, and wherein the locking apparatus prevents the frame portion from tilting relative to the base portion when the locking apparatus is in the locked position.

Abstract: An apparatus comprising a cantilever having a distal end and a proximate end, a frame portion coupled to the distal end, a base portion coupled to the proximate end, and a locking apparatus coupled to the frame portion, the base portion, or the cantilever, wherein the locking apparatus has a locked position and an unlocked position, and wherein the locking apparatus prevents the frame portion from tilting relative to the base portion when the locking apparatus is in the locked position.

Abstract: A foot stool with improved stability is infinitely adjustable and has an actuating mechanism including a ring actuator which is mounted below a spoked base to be actuated by a person setting on the stool. The ring actuator extends concentrically around the spoked base and around a vertically adjustable column which supports a seat above the floor. The ring actuator is accessible from virtually any position around the stool. Rocking the ring actuator downwardly actuates a lifting mechanism coaxially mounted within the vertically adjustable column, and the weight of the person on the seat may be used to raise and lower the stool height. Since the ring actuator is mounted below the base and close to the floor surface, the person on the stool does not have to substantially lift a leg or shift its weight to actuate the lifting mechanism.

Abstract: A knee-action chair control for a pedestal chair base comprises a base plate, a seat support plate pivotally mounted on the front of the base plate, a pair of compression springs operable between the plates for biasing the seat support plate toward an at-rest position relative to the base plate, and a novel adjustable spring preload mechanism operable between the base plate and one end of the compression springs. Additonally, there is an assembly locking plate removably mounted on the seat plate and engageable with the base plate for determining the at-rest position of the seat plate. Removal of the assembly locking plate during assembly of the control enables the compression springs and spring preload mechanism to be assembled without precompression of the springs.