Abstract: The present invention relates to a piston and a piston—connecting rod assembly for internal combustion engines or compressors, featuring a pinless connecting rod assembly having a joint claw, whereas the joint claw is formed to partly encompass an upper joining end of a connecting rod, whereas the joint claw is formed as a part of an inner section of the piston, and whereas the inner section is radially encircled by a cylindrical piston skirt. According to the invention at least one bar element is arranged extending between the inner section and the piston skirt, whereas the bar element divides a first open section from at least one second open section being arranged between the inner section and the piston skirt.

Abstract: The present invention relates to a piston and a piston-connecting rod assembly for internal combustion engines or compressors, featuring a pinless connecting rod assembly having a joint claw, whereas the joint claw is formed to partly encompass an upper joining end of a connecting rod, whereas the joint claw is formed as a part of an inner section of the piston, and whereas the inner section is radially encircled by a cylindrical piston skirt. According to the invention at least one bar element is arranged extending between the inner section and the piston skirt, whereas the bar element divides a first open section from at least one second open section being arranged between the inner section and the piston skirt.

Abstract: The present invention relates to a connecting rod for an internal combustion engine with a big bearing portion for forming a coupling arrangement with a crankshaft and with a small bearing portion for forming a coupling arrangement with a piston, whereas between the big bearing portion and the small bearing potion is arranged a rod shaft. According to the invention the rod shaft features a single piece construction with a first shaft beam and a second shaft bean arranged substantially parallel to the first shaft beam, whereas the shaft beams extend from the big bearing portion to the small bearing portion and feature a certain distance to each other, whereas at least the small bearing portion features an outer dimension which is broader than the median width of the rod shaft and the transition of the rod shaft into the small bearing portion features a concave transition portion.