A new active-caster drive system with a dual-ball transmission for omnidirectional mobile robots | Semantic Scholar
Design of the Dual Offset Active Caster Wheel for Holonomic Omni-Directional Mobile Robots - Woojin Chung, Chang-bae Moon, Changbae Jung, Jiyong Jin, 2010
caster definition - RC Car Glossary
Kinematic analysis and simulation of active-caster robotic drive with ball transmission (ACROBAT-S)
Kinematic analysis and simulation of active-caster robotic drive with ball transmission (ACROBAT-S)
A novel step climbing strategy for a wheelchair with active-caster add-on mechanism | Semantic Scholar
VIVO 2 inch M10 Caster Wheels (Set of 4) for TV Carts, Desk Frames, and More - Walmart.com