Abstract: A wheeled carriage has a chassis with a plurality of swivel casters, and a locking assembly actuated by a foot pedal located along the front of the carriage. Pushing down on the foot pedal rotates a cam that engages a cam follower on a "T" bar frame supporting two locking rings which respectively overlie two of the caster wheels to move the rings into a locking position in engagement with the wheels to lock the wheels and the casters in any position. The cam follower surface includes a ramp portion engageable by the cam for driving the rings to their locking position and a horizontal latch portion engageable by the cam in its "overcenter" position for holding the rings in their locking position. A lifter bar is engageable by the user's foot to rotate the cam back off the follower and permit the rings to resiliently return to their release position.

Abstract: A variable leverage tool handle comprises a handle having first and second elongated parts and a pivotal tongue and clevis joint therebetween, accommodating movement approximately 90.degree. in opposite directions from a normal in-line configuration. The joint includes a detent pin resiliently biased against the tongue for engagement with at least one pin-receiving depression thereon resiliently retaining the first and second handle parts in their normal in-line configuration.