An air compressor includes a valve plate with cooling fins and a piston also
having
cooling fins. The valve plate includes an integral and angled valve plate outlet.
The angling of the valve plate outlet reduces turbulence and improves compressed
air flow. The pump frame of the gas compressor includes a lipless bearing bore,
decreasing the distance between the portion of the frame supporting the bearing
and the piston. The pump frame is flat such that a portion of the cylinder is over
a portion of the motor. The flatness of this arrangement increases the strength
of the pump frame. The piston bearing bore includes two clamping structures having
screw holes. Each screw hole is formed from a series half-cylinder or barrel portions,
which individually do not form the complete circumference of a hole. Such a screw
hole does not require a core pull on casting, lowering manufacturing costs. The
piston includes a piston seal which is angled with respect to the piston. The piston
head is machined at an angle to lower the amount of dead space near the top of
the cylinder. The compressor includes a fan which operates efficiently at different
speed settings. The fan is a radial fan including two sets of fan blades, a set
of inner flat fan blades which operate most efficiently at a first range of speeds
and a set of outer curved fan blades which operate most efficiently at a second
range of speeds. The fan blows air through the compressor in a novel air cooling
pattern, propelling air axially upward along the outside of the cylinder, increasing
cooling efficiency.
