Compressor, spray apparatus using the compressor, and air brush for the spray apparatus

In a spray apparatus having a compressor for generating and discharging compressed air, and an air brush for receiving the compressed air and creating suction using the compressed air to spray the liquid out of a nozzle, an means for supplying the discharged compressed air to the air brush, said compressor comprising:

• a casing;
• a small DC motor having an output power of between 1 W and 80 W, said DC motor being mounted in said casing and having an output shaft;
• reduction gears mounted in said casing and connected to said output shaft of said motor;
• conversion means mounted in said casing for converting the rotary force from said reduction gears into reciprocatable motion;
• guide portions provided in said casing;
• actuator members mounted in said casing, said actuator members being connected to said conversion means and reciprocatably disposed in said guide portions;
• a valve block mounted in said casing;
• at least three air compressing members mounted in said casing, one end of each of said compressing members being attached to one of said actuator members and the other open end being coupled with said valve block in a closely-sealed state;
• pairs of a suction valve and an exhaust valve disposed in said valve block for controlling suction and exhaust operation of said air compressing members, a number of said pairs being equal to that of said air compressing members;
• a discharging hole disposed in said valve block;
• and
• an air collection path disposed in said valve block for communicating compressed air exhausted from each of said exhaust valves with said discharging hole;
• wherein said air compressing members are successively actuated with a phase difference therebetween to continuously discharge said compressed air out of said discharge hole in response to the rotational drive of said motor.