Full definition
Hydraulic cylinder with multiple concentric stages extending sequentially to achieve a long total stroke in a compact retracted length. Stages: 2-6. Stroke-to-retracted-length ratio: up to 6:1. Force decreases in successive smaller-bore stages. Types: single-acting (gravity return, dump trucks) and double-acting (forced extension and retraction). Applications: dump trucks, elevating platforms, compactors. Brands: Parker, Bosch Rexroth, Pneumatic Components.