Gas compressor

An apparatus for compressing gas and delivering partially cooled gas to a desired location comprising:

• a crankcase assembly, a single cylinder attached to the crankcase assembly, blower means for moving air toward the cylinder, said cylinder having a cylindrical bore defining a chamber, said crankcase assembly having a piston located in the bore, and crankshaft means connected to the piston operable to reciprocate the piston in the bore, said crankcase assembly, cylinder, blower means, and piston comprising engine components of a conventional, air cooled, four cycle, single cylinder internal combustion engine, a valve assembly mounted on the cylinder over the bore for controlling the flow of gas into and out of chamber in response to movement of the piston in the bore, head means located in engagement with the valve assembly to hold the valve assembly on the cylinder over the chamber, said head means having a recess larger than the valve assembly accommodating the valve assembly and forming therewith an annular space around the valve assembly, said head means further having air passages open to the annular space to allow air to flow through the annular space to cool the valve assembly, and after cooler means connected to the head means for carrying hot compressed gas from the head means to a desired location, said after cooler means being located adjacent the blower means whereby air moved by the blower means flows past the after cooler means and cools the compressed gas flowing in the after cooler means.

An apparatus for compressing a gas, comprising:

• a crankcase assembly, a single cylinder attached to the crankcase assembly, said single cylinder having a cylindrical bore providing a chamber, a piston located in said bore, and crankshaft means connected to the piston to reciprocate the piston in the bore, said crankcase assembly, cylinder, piston, and crankshaft means comprising engine components of a conventional four-cycle, single cylinder internal combustion engine, a valve assembly mounted on the cylinder over the bore for controlling the flow of gas into and out of the bore in response to movement of the piston in said bore, head means located in engagement with the valve assembly to hold the valve assembly on the cylinder over the chamber, said head means having a gas inlet passage in communication with the valve assembly and a gas outlet passage in communication with the valve assembly for carrying compressed gas, said head means being spaced above the top of the cylinder by the valve assembly to provide for the movement of air between the head means and the cylinder to minimize the transfer of heat from the head means to said cylinder, said head means having a recess larger than the valve assembly accommodating the valve assembly and forming therewith an annular space around the valve assembly, said annular space around the valve assembly, said annular space being open to the space between the head means and the top of the cylinder, said head means having at least an air passage open to the annular space to allow air to flow through said annular space to cool the valve assembly, and means securing the head to the cylinder thereby holding the valve assembly in assembled relation with the head means and cylinder.