DEVICE FOR FORMATION OF CHANNELS IN CONCRETE AND REINFORCED CONCRETE STRUCTURES Russian patent published in 1994 - IPC

Abstract RU 2020065 C1

FIELD: construction. SUBSTANCE: device has flexible shell accommodating along its axis flexible core with lateral ribs and tie-rod rigidly connected to it. Tie-rod is also connected with one end of shell. Lateral ribs of flexible core have holes for lubricant. Ends of stiffening ribs may be made with rolling solids of revolution. EFFECT: higher efficiency. 2 cl, 4 dwg

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RU 2 020 065 C1

Authors

Кapustin Аnatolij Ivanovich[Md]

Dates

1994-09-30—Published

1990-04-20—Filed