Flexible hoses

Details Flexible hoses Flexible hoses

1998-11-12

2000-02-15

Kashnikow, Andres

Pipes and tubular conduits

Flexible

Corrugated

138121, 138118, F16L 1111, F16L 1112, F16L 1100

Patent

active

060241322

ABSTRACT:
The flexible hose comprises a bellows hose wall 1 composed of an inner wall 2 and an outer wall 3 each made of a soft resin and a spiral hard reinforcement 4 interposed therebetween. As the hose contracts, a spiral groove 7 is formed inside of the hose. The inner wall 2 is not partially bonded or fused with the outer wall 3 and the hard spiral reinforcement 4 to form unbonded sites or fragments 8. As the hose contracts, the unbonded fragments 8 are separated from the outer wall 3 and the spiral hard enforcement 4 and move to the inward direction of the hose, and close the spiral groove 7. Therefore, even a fluid flows to any longitudinal direction, the flexible hose reduces a flow resistance.

REFERENCES:
patent: 3572393 (1971-03-01), Eisert
patent: 5485870 (1996-01-01), Kraik
patent: 5555915 (1996-09-01), Kanao

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