Patent ID: 10981748

Abstract:
A frictionless service carriage system including: a shaft 1 having a first 2 and a second 3 helix-shaped guide in its surface, each helix shaped-guide 2, 3 defining a linear movement along the longitudinal axis of the shaft 1 of a carriage 4 in opposite directions and both helix shaped-guides 2, 3 crossing each other 2, 3 along the longitudinal axis of the shaft 1, wherein the carriage 4 includes a movable element 5 located successively in each of the helix-shaped guides 2, 3 and movable along the guides 2, 3, the movable element 5 comprising a set of rolling elements 6 along the first or second helix-shaped guide 2, 3 of the shaft 1 and configured such that in a crossing with the other helix-shaped guide 2, 3, the set of rolling elements 6 has at least two contact points with the helix-shaped guide 2, 3 for which it rolls.