Abstract: A grinding machine having a frame that supports an overhead grinder having a generally horizontal grinding wheel. Longitudinal beam assemblies are supported by the frame. The upper edges of the beam assemblies define inverted V guide tracks on which the wheels of a truck are supported. The truck has an upper deck that supports an object to be ground. The beam assemblies are supported from the frame by universal mounted adjustable legs. Cam and cam follower connections between the beam assemblies and the frame restrict lateral movements and maintain the alignment of the beam assemblies as they are vertically adjusted by the adjustment of the adjustable legs. The adjustment of the beam assemblies allows the tracks to be set parallel to one another defining an inclined plane. The truck has wheels on adjustable bearings so the deck will remain parallel to the grinding surface of the grinding wheel to be ground.

Abstract: A filter system that is portable and has no moving parts usable for industrial purposes to filter dry fluid substances such as Barite, Hemitite, cement and the like. Within a filter housing are a cyclone separator for removing heavier substance and a fine filter for filtering lighter powdery substance. The inlet to the housing is connectable to the vent of a storage receptacle to which substance is being transferred under the power of a blower. The blower creates the stream that causes substance to flow through the filter system so that no other power means is required. To purge the filter system, a normally capped outlet is connected directly to the storage receptacle and a vent port from the filter housing is connected directly to the blower means. The blower means is operated in spurts to create bursts of air in a direction opposite to the filtering direction to dislodge powder from the fine filter and blow the powder and heavier particles from the filter housing directly into the storage receptacle.