Patent ID: 8562306

Claim:
A compressor apparatus comprising, in a storage case, a motor; a rotational shaft that is rotationally driven by the motor; a compressor main body comprising a rod attached to the rotational shaft via a crank, a piston disposed at an end of the rod, and a cylinder housing that receives at one end the piston, allows the piston to move in a reciprocating manner, and forms a cylinder chamber for compressing air between said piston and the other end of the cylinder housing; an air-supplying means having an air-supplying flow channel to supply the compressed-air from said cylinder chamber into a tire; and a detection means which notifies a user that a pressure of the compressed-air supplied from said cylinder chamber exceeds a reference pressure and prompts the user to turn off said motor; wherein said detection means includes a valve main body having a valve flow channel including one end leading to the air-supplying flow channel and another end leading to an exhaust port, and a switch valve intermediating in the valve flow channel and releasing the valve flow channel to exhaust the air from said exhaust port when the compressed-air pressure exceeds said reference pressure; a detection cap disposed in said exhaust port and on an upper portion of the valve main body, said detection cap comprising a cylindrical body and a plate part that closes an upper end of said cylindrical body, and said detection cap having a normal position, which is at a same level as an outer surface of said storage case or on an inward side of the outer surface of said storage case, or being pushed up to a protruding position, which protrudes over the outer surface of said storage case, by the air pressure exhausted from said exhaust port, and a retaining means to keep said detection cap at said normal position when said compressed-air is below the reference pressure, and a gap for exhausting air from the exhaust port is provided between an outer peripheral surface of the valve main body and an inner peripheral surface of the cylindrical body of the detection cap.