Abstract: The present invention is a tire cutting machine comprising of a base, a body member, a drive assembly means and a cutting assembly means. The drive assembly means includes a drive power means simultaneously engaged to a pair of front drive wheels and to a pair of rear drive wheels to provide rotation thereof. The front drive wheels are coaxially mounted in close relation to one another on a front drive wheel shaft extending between a first drive assembly arm and a second drive assembly arm. The rear drive wheels are coaxially mounted in close relation to one another and to a guide wheel which is directly engaged to the drive power means. The cutting assembly means includes a cutting power means simultaneously engaged to a front cutting wheel and to a rear cutting wheel to provide rotation thereof.

Abstract: The present invention is a tool for removing and installing valve springs on an internal combustion engine, said tool having a body with a pair of prongs at one end and a handle means for supplying a downward force at the other end. At the extreme end of the pair of prongs is a rotatably mounted shaft which has a centrally located bore, the axis of which is perpendicular to the axis of the shaft. The bore is positioned about a rocker arm stud or bolt corresponding to the valve spring to be worked upon. Located at the top of the bore is a flat face which engages a nut placed on a rocker arm stud or the underside of the bolt head of the rocker arm bolt. The tool is then centrally positioned over the valve stem such that the prongs engage the valve spring keeper. As a downward force is applied to the body member, the prongs compress the valve spring and allow the removal or installation of the valve spring keeper lock.

Abstract: The present invention is a rock dusting apparatus comprising of a pressure-sealable tank, an air distributor and a means of supplying a source of pressurized air. The air distributor is positioned inside the tank. Rock dust is then placed inside the tank which is then sealed. Air is introduced into the tank through the air distributor which includes a plurality of orifices through which the air passes. The air then mixes with, dries and suspends the rock dust particles. The air stream carrying the entrained rock dust particles exits the tank through an outlet opening thereby distributing the rock dust as required.