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US 2008/0072984 A1Published application
Fluid transfer hose reinforced with hybrid yarn
AssigneeThe Gates Corporation
InventorsMorris Branch, Yelena Gray, Doug Schelhaas
Life of this patent
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Abstract
A flexible hose comprising a tube, a knit fabric, and a cover. The knit fabric comprises a hybrid yarn which comprises a first yarn of co-para-aramid fibers and a second yarn of meta-aramid fibers. The hose exhibits significantly improved burst pressure and/or improved impulse fatigue resistance.
Claims20
A flexible hose comprising a tube, a knit fabric, and a cover;
- said knit fabric comprising a hybrid yarn comprising a first yarn of co-para-aramid fibers and a second yarn of meta-aramid fibers.
A hose assembly comprising a flexible hose comprising an inner tube;
- an outer cover;
- a knit fabric residing between said tube and said cover and comprising a hybrid yarn comprising a first yarn of co-para-aramid fibers and a second yarn of meta-aramid fibers;
- and at least one fitting, clamp, coupling, or fluid handling device associated with said hose.
A method comprising:
- combining at least a first base yarn comprising co-para-aramid and a second base yarn comprising meta-aramid to form a hybrid yarn;
- forming a tube;
- knitting said hybrid yarn to form a reinforcing fabric layer on said tube;
- and
- forming a cover about said tube and fabric layer.
2 more elements
A low-pressure fluid transfer hose comprising a tube, a cover, and a knit fabric reinforcement as the primary reinforcement;
- said knit reinforcement embedded between said cover and said tube and comprising a hybrid yarn comprising a first base yarn of TECHNORA® fibers and a second base yarn of NOMEX® fibers;
- said first yarn and said second yarn twisted together with from 1 to about 5 turns per inch;
- and said knit reinforcement comprising from about 50 to about 200 loops per foot.
Dependencies are inferred from the claim text.