Piston with active structure

A piston-connecting rod assembly for use with a crankshaft drive for internal combustion engines or compressors, comprising:

• a connecting rod featuring a pitiless connecting rod assembly;
• a piston coupled to said connecting rod and having an inner section defined therin;
• a cylindrical piston skirt extending from said piston and radially encircling said inner section;
• a joint claw integrally formed in said inner section of said piston and configured to be coupled to, and at least partially encompass, an upper joining end of said connecting rod;
• at least one bar element extending between said inner section and said piston skirt, said at least one bar element separating a first open section in said piston from at least one second open section in said piston, said first and second open sections being defined between said inner section and said piston skirt.