Manhole cover for e.g. road construction, has two lifting devices, each with extension for gripping, where extensions are hooked into corresponding jacks fixed to ends of cover diameter to lift cover in lifting direction

摘要

The cover has two jacks (30, 30`) fixed at ends of the cover, and two clamping units (12, 22) fixed to grooves in a frame (10) of the cover. Two lifting devices have extensions for gripping, and seating units. The extensions are hooked into corresponding jacks (30, 30`) to provide a clamping force on the center of gravity of the cover for lifting the cover in a lifting direction.