On which type of crankshaft is a ring coupled connecting rod used?

A ring coupled connecting rod is specifically used with an eccentric crankshaft. This type of crankshaft incorporates an off-center rotation that allows the connecting rod to extend and retract in a way that efficiently converts rotary motion into linear motion. The design of the ring coupling facilitates smooth movement and alignment between the crankshaft and the connecting rod, minimizing wear and allowing for more efficient operation.

In applications where precise movement and reduced friction are necessary, using a ring coupled connecting rod with an eccentric crankshaft becomes ideal, as this configuration optimally supports the differing motions required in various systems, such as compressors in refrigeration and air conditioning. The other types of crankshafts provided as options do not offer the same functional benefits for this specific connecting rod design.