PISTON MACHINE Russian patent published in 2001 - IPC

FIELD: piston machines used in power plant industry as engines including internal combustion engines and pumps. SUBSTANCE: piston machine has cylinders with pistons installed oppositely on brackets of load-carrying frame, shaft with discs located between pistons. Disc opposite surfaces have shaped races in the form of continuous grooves. Cylinders have side slots in which piston pins slip and are engaged by means of roll supports with side surfaces of grooves of both discs. Each piston has two heads between which piston pin is installed. Each cylinder end is closed with heads having inlet and discharge valves. Each cylinder also has side bosses for attachment of brackets to shaft bearing support. EFFECT: reduced friction losses and increased specific power. 2 cl, 2 dwg