Locking cylinder for ramps for low bed trucks has units for disengaging a plunger thread and a spindle thread so that axial movement of the plunger about the rotary axis is possible relative to the cylinder without rotating the spindle

摘要

Locking cylinder (20) has units for disengaging a plunger thread (34) and a spindle thread (36) so that axial movement (179) of the plunger (22) about the rotary axis (43) is possible relative to the cylinder (21) without rotating the spindle (35). Preferred Features: The spindle and the plunger are structured with a free wheel so that the plunger thread and the spindle thread are disengaged in a determined lifting position of the plunger relative to the spindle.