Controlled expansion hose
AssigneeThe Gates Corporation
InventorsAlan C. JOHNSON, Alexandra Mei Ng
Life of this patent
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Abstract
An expansion hose adapted for smoothing pressure fluctuations in a hydraulic system having an inner tube, a textile reinforcement, and an outer cover. The reinforcement includes a plurality of yarns, which in turn have a plurality of filaments of first fiber material type and a plurality of filaments of second fiber material type, with first fiber type having elongation at break higher than the second fiber type by at least about 4% elongation. The expansion hose may be part of an assembly including at least one fitting, coupling, bracket, hose clamp, or other hose.
Claims22
An expansion hose comprising an inner tube, a textile reinforcement, and an outer cover;
- the reinforcement consisting essentially of a plurality of nylon yarns and a plurality of polyester yarns wherein said textile reinforcement comprises a balanced reinforcing layer of braided, spiraled or wrapped yarns, and wherein the nylon and the polyester yarns are arranged in alternating fashion in the balanced layer.
An expansion hose comprising an inner tube, a textile reinforcement, and an outer cover;
- the textile reinforcement consisting of a first braided layer of nylon yarns and a second braided layer of polyester yarns.
An expansion hose comprising an inner tube, a textile reinforcement, and an outer cover;
- the reinforcement consisting of a plurality of nylon yarns in a first balanced pair of spiral wrapped layers, and a plurality of polyester yarns in a second balanced pair of spiral wrapped layers.
A hose assembly comprising an expansion hose for smoothing pressure fluctuations and at least one fitting, coupling, bracket, hose clamp, or other hose;
- the expansion hose comprising an inner tube, a textile reinforcement, an outer cover;
- the reinforcement consisting of a first braided or balanced wrapped layer of nylon yarns and a second braided or balanced wrapped layer of polyester yarns.
A method comprising:
- a) forming a tube;
- b) applying to said tube a reinforcement consisting essentially of yarns of polyester and yarns of nylon in a balanced braided layer having the two types of yarns arranged in alienating fashion in the balanced layer or a reinforcement consisting of a first braided or balanced wrapped layer of said nylon yarns and a second braided or balanced wrapped layer of said polyester yarns;
- c) applying a friction rubber layer between said first and said second layers;
- and
- d) applying a cover layer of rubber and/or textile to form an expansion hose of predetermined burst pressure rating and volumetric expansion, thereby adapted to smooth pressure pulses in a hydraulic system.
A hose assembly comprising an expansion hose for smoothing pressure fluctuations and at least one fitting, coupling, bracket, hose clamp, or other hose;
- the expansion hose comprising an inner tube, a textile reinforcement, an outer cover;
- the reinforcement consisting essentially of yarns of polyester and yarns of nylon in a balanced braided layer having the two types of yarns arranged in alternating fashion in the balanced layer.
(canceled)
Dependencies are inferred from the claim text.