PROTECTIVE CASE FOR WATERPROOFING DEVICE Russian patent published in 2006 - IPC E04B1/62 E03C1/20 F16L51/02 

FIELD: building, particularly waterproofing operations during performing construction-and-assembling or repair operations in space between hollow cylindrical members having different diameters arranged at least partly one inside another.

SUBSTANCE: protective case to close space between hollow cylindrical structure members formed as two coaxial or parallel pipes at least partly installed one inside another comprises flexible shell of polymeric material enclosing the cylindrical members. The flexible shell has conical surface or surface shaped as corrugation defining S in longitudinal section. The folded flexible shell surface parts may be overlapped. The case is created of two coaxial members. Inner member is formed of laminated fiberglass plastics and made as upper and lower semi-cases connected with each other by bolt connections. The semi-case has cylindrical surface provided with stiffening rib and conical part adjoining the cylindrical part. Lower semi-case has through orifices located from both stiffening rib sides and adapted for water discharge. Outer semi-case is made of coaxial parts formed of filtering material wound on semi-cases so that free space is formed between the filtering material and semi-cases. The free space is divided with stiffening rib and cylindrical part end edges along free space perimeter. The free space defines water discharge through perforated orifices of inner case and prevents foreign particle penetration into orifices. The polymeric material is rubber reinforced with elastic fiber.

EFFECT: increased quality and reliability of waterproofing operations to be performed, provision of structure connections movability without structure corruption and increased service life.

2 cl, 3 dwg