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US 7,017,616 B2Granted
Reinforced hose
AssigneeToyoda Gosei Co., Ltd.
InventorsMitsugu Ono, Satoshi Mizutani, Kenichiro Furui, Yuichiro Murakami
Life of this patent
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Abstract
A brake hose has an inner rubber layer, an outer rubber layer, and at least two reinforcing layers provided between the inner rubber layer and the outer rubber layer. The reinforcing layers include an upper yarn layer, and a lower yarn layer. Polyester yarn having a tensile strength of not lower than 6.9 g per unit dtex and having a stretchability of 2.6±1.0% at 2.7 g load per unit dtex is used as lower yarn in the lower yarn layer. The braid angle of the lower yarn layer with respect to the axial direction of the hose is set at 59±2°.
Claims11
A reinforced hose comprising:
- an inner rubber layer;
- an outer rubber layer;
- and
- at least two reinforcing layers provided between the inner rubber layer and the outer rubber layer, including a lower yarn layer formed on the inner rubber layer and an upper yarn layer formed outside of the lower yarn layer,
- wherein the lower yarn layer is braided from a reinforcing yarn at a braid angle of 59±2° with respect to an axial direction of the hose, the reinforcing yarn being made of polyester yarn having a tensile strength of not lower than 6.9 g per unit dtex and having a stretchability of 2.6±1.0% at 2.7 g load per unit dtex;
- wherein the upper yarn layer is braided from the reinforcing yarn at the braid angle of 59±2°, the braid angle being larger than a repose angle with respect to an axial direction of the hose;
- and
- wherein the polyester yarn comprises a high-modulus PET yarn.
5 more elements
Dependencies are inferred from the claim text.