Patent ID: 6135725
Filing Date: 2000-10-24
Classification: F04B

Abstract:
A valved piston arrangement for an electric motor driven air compressor comprising:a motor provided with an output shaft having a semi-cylindrical portion at an outer end thereof, a side of said motor being formed with a plurality of first slots and two threaded holes, a top of said motor having a plurality of openings;a mount formed with a vertical cylinder and a downwardly extending lug, said vertical cylinder having an upright stub tube sealed by a cap which holds a spring inside said upright stub tube and an exhaust valve block at a bottom of said spring, a guide tube and a coupling tube being respectively and perpendicularly connected to said upright stub tube, said lug having a plurality of second slots aligned with said first slots, two holes aligned with said two threaded holes, and a center hole dimensioned to receive said output shaft;a transmission mechanism including a circular body and a counterweight fitted in said circular body, said circular body being formed with a recess at one side thereof and a notch in communication with said recess, two stoppers being provided at two opposite sides of said recess, said circular body being provided with a plurality of blades around a circumferential edge thereof and a plurality of baffles on another side thereof, said counterweight being configured to fit into said recess so that said counterweight is kept in place by said two stoppers, said counterweight being formed with a semi-circular opening at a central portion adapted to receive said semi-cylindrical portion and a coupling rod arranged eccentrically above said semi-circular opening, said semi-circular opening having a vertical threaded through hole engageable with a screw; anda compression mechanism mounted inside said cylinder and coupled to said coupling rod through a link, said link having a barrel at one end coupled to said coupling rod and two reversed coupling rods at an opposite end thereof, said compression mechanism comprising a base, a compressible conical piston, and a conical piston holder, said base comprising two coupling holes bilaterally disposed at a bottom and respectively coupled to said reversed coupling rods, a coupling bolt raised from a top and having a head at the top, a retainer rod raised from a center of said head, a plurality of axial air holes through said coupling bolt and said base, a valve flap slidably mounted around said retainer rod, and a cap having a coupling portion at a center coupled to said retainer rod above said valve flap.