Sound proofed and air cooled shell for portable air compressor

Claim 2

A sound proofed and air cooled portable compressor apparatus comprising a box-like shell having a roof, side walls, a front wall and a rear wall, a combustion engine driven air compressor unit confined within the shell provided with cooling radiator means at its forward end and with an engine driven fan located between the engine and the radiator means for drawing cooling ambient air through the radiator means and blowing it over the unit and through the shell, an air inlet chamber defined at the forward end of the shell between the front wall and the radiator means, air intake openings adjacent the front wall formed in the roof and side walls and opening directly onto the chamber for allowing ambient air to be drawn by the suction of the fan into the chamber and through the radiator means, multiple vent openings formed in the rear wall communicating directly into the rear of the shell for allowing exit of air blown by the fan through the shell, the vent openings comprising a plurality of channels extending forwardly partway into the shell, and there being a plurality of Acoustic sound attenuating panels arranged in the rear area of the shell parallel to each other and to the longitudinal axis of the shell and defining the channels, the direction of movement of the ambient air drawn into the chamber being linearly from the chamber at the front end of the shell to the vent openings at the rear end of the shell.

Claim 3

A sound proofed and air cooled portable compressor apparatus comprising a box-like shell having a roof, side walls, a front wall and a rear wall, a combustion engine driven air compressor unit confined within the shell provided with cooling radiator means at its forward end and with an engine driven fan located between the engine and the radiator means for drawing cooling air through the radiator means and blowing it over the unit and through the shell, a chamber defined in the shell between the front wall and the radiator means, air intake openings adjacent the front wall formed in the roof and side walls opening directly into the chamber for allowing ambient air to be drawn by the suction of the fan into the chamber and through the radiator means, and multiple vent openings formed in the rear wall communicating directly into the rear of the shell for allowing exit of air blown by the fan through the shell, the vent openings comprising a plurality of channels extending forwardly partway into the shell, there being a plurality of acoustic sound attenuating panels arranged in the rear area parallel to each other and to the side walls of the shell defining the channels, and a sound proofed muffler housing mounted atop the roof of the shell, a pair of exhaust coupled to the engine located externally of the shell in the muffler housing, each muffler having an engine exhaust inlet pipe and an exhaust discharge pipe projecting from its rear end, the inlet pipe depending freely through a hole in the roof of the shell and coupled to the engine, the discharge pipe extending upwardly and freely through a hole in the roof of the muffler housing, the said holes in the roof of the shell and in the roof of the muffler housing being aligned with each other, the mufflers being supported in the muffler housing in spaced relation to the walls of the latter, and there being a cooling air inlet opening through the roof of the shell immediately rearwardly of the fan into the muffler housing adjacent the front ends of the mufflers.

Claim 4

A sound proofed and air cooled portable compressor apparatus comprising a box-like shell having a roof, side walls, a front wall and a rear wall, a combustion engine driven air compressor unit confined within the shell provided with cooling radiator means at its forward end and with an engine driven fan located between the engine and the radiator means for drawing cooling air through the radiator means and blowing it over the unit and through the shell, a chamber defined in the shell between the front wall and the radiator means, air intake openings adjacent the front wall formed in the roof and side walls opening directly into the chamber for allowing ambient air to be drawn by the suction of the fan into the chamber and through the radiator means, and multiple vent openings formed in the rear wall communicating directly into the rear of the shell for allowing exit of air blown by the fan through the shell, the vent openings comprising a plurality of channels extending forwardly partway into the shell, there being a plurality of acoustic sound attenuating panels arranged in the rear area parallel to each other and to the side walls of the shell defining the channels, and a sound proofed muffler housing mounted atop the roof of the shell, a pair of exhaust coupled to the engine located externally of the shell in the muffler housing, each muffler having an engine exhaust inlet pipe and an exhaust discharge pipe projecting from its rear end, the inlet pipe depending freely through a hole in the roof of the shell and coupled to the engine, the discharge pipe extending upwardly and freely through a hole in the roof of the muffler housing, the said holes in the roof of the shell and in the roof of the muffler housing being aligned with each other, the mufflers being supported in the muffler housing in spaced relation to the walls of the latter, and there being a cooling air inlet opening through the roof of the shell immediately rearwardly of the fan into the muffler housing adjacent the front ends of the mufflers.