F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
189/53, 18/784
F16L 9/00 (2006.01) F16L 11/16 (2006.01)
Patent
CA 1080140
Abstract of the Disclosure A flexible hose having resistance to radial crush is formed from a bonded and interlocked helically wound rod or strip of plastic co-extrusion. The co-extruded profile of the strip is defined by a pair of matable rib components which are joined by a web. The rib components are bonded, sealed and interlocked together at adjoining convolutions of the profile not only to form the hose but also to form a composite rib integrated into the hose for resisting radial crushing and axially directed deformation forces exerted on the hose. The composite rib is formed form a material having a hardness which is greater than that of at least a part of the web for rendering the rib with a relatively stiff bend resistance characteristic and the web with a relatively soft and flexible characteristic. The web itself may be a co- extrusion of two materials placed in series, or in parallel as a laminate, or a combination thereof. If a laminate, one of its materials may be the same as that of the rib but much thinner so as to provide a larger surface area for greater bonding or adhesion amoug the several parts of the extruded pro- file. Different materials, especially in a laminate, enable the hose to be tailored for specific uses and environments which come into contact with either or both the inside and outside of the hose.
276498
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