Cutting saw and concrete groover

In apparatus for cutting material with a circular saw blade, the improvement comprising in combination:

• a housing including a curved top for partially accommodating the saw blade, and a bottom having an opening permitting partial protrusion of the saw blade from the housing;
• means for enabling manual propulsion of the housing along said material, including a curved handle on said top having identically dimensioned first and second handle portions extending in parallel to said partially accommodated and protruding saw blade in opposite directions from a central location on said top situated opposite said bottom;
• means connected to the housing and the saw blade for rotating said partially accommodated and protruding saw blade;
• and
• means connected to the housing for guiding the saw blade in cutting engagement with said material and for maintaining the housing including said bottom in spaced relationship to said material during cutting with the saw blade.

In apparatus for cutting material with a circular saw blade, the improvement comprising in combination:

• a housing including a curved top for partially accommodating the saw blade, having a lateral first opening to one side of said partially accommodated saw blade, and a bottom having a second opening permitting partial protrusion of the saw blade from the housing;
• means for enabling manual propulsion of the housing along said material, including a handle on said top extending in parallel to the partially accommodated and protruding saw blade;
• means connected to the housng and saw blade for rotating said partially accommodated and protruding saw blade, including a mounting plate structure for closing said lateral first opening, means for releasably attaching said mounting plate structure to said curved top at said lateral first opening, a shaft for mounting said saw blade, means connected to said housing and mounting plate structure for rotatably mounting said shaft, a motor mounted on said mounting plate structure, and means for coupling said motor to said shaft for driving said saw blade;
• and
• means connected to the housing for guiding the saw blade in cutting engagement with said material and for maintaining the housing including said bottom in spaced relationship to said material during cutting with the saw blade.

In apparatus for grooving concrete with a stack of mutually spaced, parallel circular concrete saw blades, the improvement comprising in combination:

• a housing including a curved top for partially accommodating the stack of saw blades, and a bottom having an opening permitting partial protrusion of the stack of saw blades from the housing;
• means for enabling manual propulsion of the housing along concrete being grooved, including a curved handle on said top having identically dimensioned first and second handle portions extending in parallel to said saw blades and in opposite directions from a central location on said top situated opposite said bottom;
• means connected to the housing and saw blade stack for rotating said partially accommodated and protruding saw blade stack;
• means connected to the housing for guiding the saw blade stack in cutting engagement with the concrete and for maintaining the housing including said bottom in spaced relationship to the concrete during grooving with the saw blade stack;
• and
• means for cooling said saw blades.