An air compressor comprising:
- a mount having an upright cylinder at a top side thereof, an axle hole at a bottom side thereof, and
- a bushing mounted in said axle hole, said cylinder comprising an air intake hole, an air outlet hole, an exhaust valve block supported on a spring means to control said air outlet rod, a guide tube connected to said air outlet hole for exhaust of compressed air from said air outlet hole, and an air pressure gage for measuring the pressure of air passing from said air outlet hole to said guide tube;
- a motor mounted on said mount, said motor having a motor shaft and a pinion fixedly mounted around said motor shaft;
- a transmission mechanism mounted on said mount and driven by said motor, said transmission mechanism comprising a shaft inserted through the bushing in the axle hole of said mounting and having a flat section at one end, a transmission gear fixedly mounted around the flat section of said shaft and meshed with said pinion, and a counterweight fixedly mounted on said shaft at one end remote from said transmission gear, said counterweight having a plurality of radiating fins raised from the periphery and an eccentric coupling rod perpendicularly raised from one side;
- a compression mechanism coupled to said transmission mechanism and reciprocated by it in said cylinder to compress air, permitting compressed air to be forced through said air outlet hole into said guide tube, said compression mechanism comprising a base, a compressible conical piston, and a compressible conical piston holder, said base comprising a coupling bolt raised from a top side thereof and having a head and adapted for holding said compressible conical piston holder and said compressible conical piston in said compressible conical piston holder, a retainer rod raised from the head of said coupling bolt, and a plurality of axial air holes made through said coupling bolt and said base and disposed in communication between said air intake hole and said air outlet hole;
- and
- a link coupled between the base of said compression mechanism and the coupling rod of the counterweight of said transmission mechanism;
- wherein said mount and said cylinder are integrally molded together;
- the coupling bolt of the base of said transmission mechanism is inserted through a center hole in said compressible conical piston holder and a center hole in said compressible conical piston, having a head stopped above said compressible conical piston holder and said compressible conical piston;
- a valve flap is slidably mounted around said retainer rod which open the axial air holes of said compression mechanism during its down stroke and close the axial air holes of said compression mechanism during its upstroke;
- a cap is mounted on said retainer rod to limit upward movement of said valve flap relative to said retainer rod, said cap having a coupling portion at the center coupled to said retainer rod above said valve flap.