Patent ID: 6394143
Filing Date: 2002-05-28
Classification: A47L,F16L,Y10S

Abstract:
A flexible hose comprising:a corrugated wall (2), including an internal surface (3) with projections (4, 5) and recesses (6, 7), said hose (1) being obtained by moulding a plastic material, each internal projection (4, 5) comprising a substantially flat and smooth top face (8, 9), wherein each internal recess (6, 7) includes two opposing side walls (10, 11, 12, 13), said top face (8, 9) having a first width (W1) and said recess (6, 7) having a second width (W2), the ratio between first width and second width (W1/W2) being larger than or equal to 2.2, the first width (W1) being the distance between a first intersection (A) of a first tangent line (T1) with a second tangent line (T2) and a second intersection (B) of a third tangent line (T3) with the second tangent line (T2), the second width (W2) being the distance between the second intersection (B) and a third intersection (C) of a fourth tangent line (T4) with a fifth tangent line (T5), the first tangent line (T1) touching a side wall (11) of a first recess (6), the second tangent line (T2) touching the top face (8) of a first projection (4) adjacent to said side wall (11) of the first recess (6), the third tangent line (T3) touching a first side wall (12) of a second recess (7), said first side wall (12) being adjacent to a first (4) of said projections (4), the fourth tangent line (T4) touching the second side wall (13) of the second recess (7), said second side wall (13) opposing the first side wall (12) of said second recess (7), and the fifth tangent line (T5) touching the top face (9) of a second projection (5) which is adjacent to the second side wall (13) of the second recess (7).