Gas compressor construction and assembly

A gas compressor comprising block means having two opposed cylinder bank means each having at least one cylinder formed therein, each said bank means having an upper end, a lower end, inner wall means, outer wall means, and opposite side wall means, floor means interconnecting said cylinder bank means at their lower ends, and roof means interconnecting said cylinder bank means at their upper ends, crankcase means formed by said inner wall means, roof means and floor means, said crankcase means having a longitudinal axis extending through said roof means and floor means, first bearing means positioned on said floor means and aligned with said axis for rotatably mounting one end of a crankshaft, aperture means through said roof means, second bearing means positioned on said roof means and aligned with said axis for rotatably mounting the other end of said crankshaft through said aperture means, piston means mounted in said cylinders and each having a connecting rod mounted on said crankshaft, the adjacent edge portions of said inner wall means, said side wall means, said floor means and said roof means defining an access portal to said crankshaft and to said connecting rods through each side of said block means, drive means for said crankshaft means for rotating the same and reciprocating said pistons in said cylinders, and suction and discharge valve means for admitting said gas to and discharging said gas from said cylinders.