US 11,774,010 B2
Flat flexible hose for transporting fluids
Alessandro Cegalin, Vicenza (IT); Luca Battaglia, Bassano del Grappa (IT); and Gianfranco Battaglin, Sandrigo (IT)
Appl. No. 17/629,317
Filed by FITT S.p.A., Sandrigo (IT)
PCT Filed Nov. 23, 2020, PCT No. PCT/IB2020/061026
§ 371(c)(1), (2) Date Jan. 21, 2022,
PCT Pub. No. WO2021/100025, PCT Pub. Date May 27, 2021.
Claims priority of application No. 102019000021978 (IT), filed on Nov. 22, 2019.
Prior Publication US 2022/0275885 A1, Sep. 1, 2022
Int. Cl. F16L 11/08 (2006.01); B29C 51/12 (2006.01); B29C 51/42 (2006.01); F16L 11/12 (2006.01); B29L 7/00 (2006.01); B29L 23/00 (2006.01)
CPC F16L 11/085 (2013.01) [B29C 51/12 (2013.01); B29C 51/42 (2013.01); F16L 11/121 (2013.01); B29L 2007/007 (2013.01); B29L 2023/005 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A flexible hose for transporting a fluid, comprising:
a first inner layer defining an axis;
a second layer; and
a reinforcement textile layer interposed between the first layer and the second layer;
wherein the first layer, the second layer, and the reinforcement textile layer cooperate mutually to cause the flexible hose to move between an inoperative position, in which the flexible hose is substantially flat-shaped, and an operative position, in which the flexible hose expands radially to take a substantially tubular shape, the flexible hose moving from the inoperative position to the operative position under a pressure from a transported fluid, and from the operative position to the inoperative position when the pressure of the transported fluid pressure ceases,
wherein the first and the second layer are respectively made of a first and a second thermoformable polymeric material, mutually compatible with each other,
wherein the reinforcement textile layer consists of rigid textile yarns, which at least partially have a first and second predetermined inclination opposite to each other with respect to the axis,
wherein the reinforcement textile layer is a knitted layer with tricot chain stitches with rows of stitches and courses of stitches, at least one of the rows of stitches and at least one of the courses of stitches consisting of the tricot chain stitches, and
wherein the second layer is an outer layer adapted to be gripped by a user, the second layer having a Shore A hardness measured according to ASTM D 2240 greater than the Shore A hardness of the first layer, the second layer having a Shore A hardness measured according to ASTM D 2240 comprised between 70 ShA and 90 ShA, and the first layer having a Shore A hardness according to ASTM D 2240 comprised between 60 ShA and 80 ShA.