Double-acting telescopic cylinder with mechanical retraction

摘要

The object of the invention is to improve a known single-acting hydraulic or pneumatic telescopic cylinder with a hydraulically or pneumatically driven retraction winch in such a way that the retraction of the cylinder is effected not as known by independent or external gravitational force but by means of controlled force via hydraulic or air motor with attached winch and rope or tension band. This enables telescopic cylinders of single-acting construction to also be retracted automatically in the horizontal arrangement.