ACCESS CHAMBER HATCH Russian patent published in 2006 - IPC E02D29/12 E02D29/14 

FIELD: inspection or access chambers, particularly for building water-supply, gas-supply and sewage systems, as well as telephone and cable lines.

SUBSTANCE: hatch comprises body and lid. The body includes metal frame with ribs and covered with polymeric composition. The lid is made as vertical rod, face panel and base panel and is provided with metal sheets secured to rod, face panel and base panel. The face panel and base panes extend transversely to the rod. The metal sheets taper towards base panel and form removable frame filled with polymeric composition.

EFFECT: increased service life due to increased strength characteristics, possibility to work by abrasion and impact load, increased reliability, rigidity and corrosion resistance.

3 dwg