Caster locking mechanism and carriage

摘要: A wheeled carriage has a chassis with plurality of swivel casters, and locking assembly actuated by foot pedal located along the front carriage. Pushing down on rotates cam that engages follower "T" bar frame supporting two rings which respectively overlie caster wheels to move into position in engagement lock casters any position. The surface includes ramp portion engageable for driving their horizontal latch its "overcenter" holding lifter is user's rotate back off permit resiliently return release surfaces are so arranged limited rotation through less than about 25 degrees sufficient between configurations can be used where only few inches clearance beneath available.