Ring inserted under access shaft cover - has extension strips hinging elastically on outer periphery of main part

摘要

The ring is inserted between the cover and frame of an access shaft in a road, path etc. It is flat, its outer edge forming an inlay between the two. The edge (4) comprises a large number of strip-type extension pieces (5), hinging elastically on the outer periphery (1') of the ring (1). The material thickness of these pieces can be less that of the main part of the ring. ADVANTAGE - Better seating of cover, together with sound-dampening and longer life.