PISTON COMPRESSOR WITH ELECTRODYNAMIC DRIVE Russian patent published in 1994 - IPC

FIELD: industrial and domestic compressor stations. SUBSTANCE: piston is mounted in cylinder. Drive has electromagnetic coils, piston position sensors and device for changing-over voltage in coils connected with sensors. Magnetic core is made in form of ball lugs embracing end parts of cylinders. Lugs are connected by rods. Coils are wound on rods and are connected to device; they create unlike poles in lugs. Sensors are made in form of sleeves receiving pistons with rods. Electric terminals are secured on walls of sleeves. Rods are engageable with piston. Small pistons arranged inside sleeve close electric terminals. Above- piston chambers are brought in hydraulic communication. Device is connected to sensors by means of electric terminals. Device for supply and discharge of lubricant is brought in communication with under-piston chamber of sensors by means of check valves. EFFECT: enhanced efficiency. 3 cl, 4 dwg