A linear electrical machine (LEM) comprising a stator mounted in a housing, the housing and stator defining a working cylinder, a central core within the working cylinder and defining a cylindrical stator bore cavity therebetween, a hollow translator axial...

In an internal combustion engine, a piston (8) reciprocating in a cylinder (19) and a crankshaft (1) are linked with each other by a piston-crank linking mechanism (4, 5, 10). The crankshaft (1) includes a counterweight (15). When the piston (8) is located...

A free-piston engine that comprises a pair of parallel side-by-side combustion cylinders, a free-floating combustion piston mounted in each of said combustion cylinders for reciprocating linear motion therein, responsive to successive combustion events wit...