Abstract: During the overhaul of an internal combustion engine, a two, four, or six cylinder head or manifold is quickly mounted at a convenient working height on a portable work stand with the fire deck surface of the cylinder head entirely bearing against a sole rubber or rubber like continuous gasket to seal off most of the entries to the internal cavities in the cylinder head, through which the engine coolant flows when an engine is running. The gasket is secured to and supported on a table, which in turn is rotatably mounted and lockable on an overall frame, optionally supported on wheels. The cylinder head or manifold is clamped to the work stand in the sealed position by selectively adjusting a securement subassembly, which is quickly utilized, and which does not obscure the inspection of the unsealed surfaces of the head, during a subsequent pressurized hot water test to determine if there are any leaks in the internal coolant cavities of the head.

Abstract: A deck ramp is pivotally affixed to the bow of a boat allowing the deck ramp to serve either as a portion of the deck or as a ramp. When the deck ramp is in the closed position the deck ramp serves as a portion of the deck, which when in the open position, the deck ramp serves as a ramp for disembarkation.

Abstract: A vibrator with attached prongs which achieves the breakup of compacted materials in structures similar to silos, grain elevators and railroad cars is set forth. Attached to the pronged vibrator is a cable which allows the vibrator to be lowered into the structure where breakup is to be accomplished. The vibrator is housed within a shell of dimensions applicable to the particular use. Secured to the vibrator shell are a multiple of prongs. The vibrator when in operation causes not only the sphere to vibrate, but also the attached prongs. The vibrator is capable of imparting varying frequencies to the compacted materials and may be adjusted to reach the natural frequency of the compacted material. Thus where the vibrator comes into contact with the compacted material, breakup is achieved both by the physical action of the prongs and also by achieving the natural frequency of the material which in and of itself causes breakup.