Abstract: A surgical instrument, has an end effector that includes an ultrasonic blade, and a clamp arm that moves relative to the ultrasonic blade from an opened position toward an intermediate position and a closed position. The clamp arm is offset from the ultrasonic blade to define a predetermined gap in the intermediate position between the opened position and the closed position. A clamp arm actuator connects to the clamp arm and moves from an opened configuration to a closed configuration to direct the clamp arm from the opened position toward the intermediate position and the closed position. A spacer connects with the clamp arm to inhibit movement of the clamp arm from the intermediate position toward the closed position for maintaining the predetermined gap between the clamp arm and the ultrasonic blade.

Abstract: A ruggedly constructed work cart particularly suitable for use by mechanics includes a center work platform which is selectively heightwise adjustable. A series of platforms positionable at different heights allow the cart to function as a ladder, while a removable handle is provided so that the cart can be positioned beneath a vehicle for the purpose of supporting heavy parts. A removable tool tray can be alternatively attached to a vehicle`s bumper or tire to provide a mechanic with a "step" to gain better access to a vehicle's engine compartment.