PROTECTIVE CASE (VARIANTS) Russian patent published in 2005 - IPC

FIELD: building, particularly means to provide air-tightness during performing repair works in annular space between hollow cylindrical members located at least partly one inside another.

SUBSTANCE: protection case is adapted for means providing water-proofing of space between hollow cylindrical members of building structure made as tubes of lesser and larger diameters during its operation or repair. Case comprises shell of polymeric material enclosing hollow cylindrical members. Polymeric material may be rubber, preferably reinforced by elastic fabric. Case may be formed as truncated cone formed from circle sector part with perimeter at least partly defined by congruent circle arches and cone generators. Shell length is not less than 5 perimeters of hollow cylindrical member. Protective case is formed of multilayer members made as semi-shells and made of fiber glass. Semi-shells are connected one with another by releasable preferably bolt joints along common joint in longitudinal center plane and having rims on opposite ends thereof to install semi-shells on tube of greater or lesser diameter. Semi-shell side to be installed on tube with greater diameter has cavity for sealing sleeve. Semi-shell side to be connected to tube with lesser diameter may slide along the tube.

EFFECT: increased quality and reliability of tube coaxial mounting, maintaining of necessary connection mobility without its damage.

6 cl, 9 dwg