WATER-DRIVEN TRAVERSE-REVERSE MECHANISM FOR WATERWORKS, PARTICULARLY SHOWERS, WATER TONIC-MASSAGE FIXTURES AND THE LIKE

摘要

A drive apparatus comprising in combination a mechanism of the screw-nut screw type capable of reversing automatically the movement whenever the nut screw reaches a limit stop without stopping and/or reversing the direction of rotation of the screw. More particularly the drive apparatus includes an axially fixed screw (3) rotating only in one direction, and a nut screw (4) moving axially and capable of engaging said screw to which rotating brushes, massaging rolls, a shower head and so on can be secured. Such mechanism has an essentially cylindrical shape and is driven by a water-driven motor (2) preferably provided with demultiplier. In order that the user can vary the excursion of the shift of the nut screw, two adjustable limit stops (8) are provided which are capable of interacting with a control lever (9) for reversing the movement.