Power transmission belt and process for production of the same

Details Power transmission belt and process for production of the same Power transmission belt and process for production of the same

2011-03-08

2011-03-08

Siconolfi, Robert A (Department: 3657)

Endless belt power transmission systems or components

Friction drive belt

Including embedded elongated strand having multiple...

Reexamination Certificate

active

07901313

ABSTRACT:
A power transmission belt comprises a compression rubber layer and an adhesion rubber layer both of which are formed of vulcanizate of an ethylene-a-olefin-diene rubber compound, with a preferred ethylene content of 55-85% in the compression rubber layer. A plurality of load carrying cords formed of fiber cords adhere to and embed in the adhesion rubber layer. The compression rubber layer has a modulus of elasticity in tension of a in the lengthwise direction of the belt and a modulus of elasticity in tension of b in the widthwise direction of the belt, and a and b satisfy the relationship: 0.9≦a/b≦1.2. The compression rubber layer may contain short fibers therein in an amount of not more than 5 parts by weight in relation to 100 parts by weight of the ethylene-a-olefin-diene rubber, used in such a manner that the fibers are oriented in the lengthwise direction of the belt.

REFERENCES:
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patent: 6358171 (2002-03-01), Whitfield
patent: 2002/0187869 (2002-12-01), Martin et al.
patent: 4-269526 (1992-09-01), None
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patent: 2003012871 (2003-01-01), None
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patent: 2003-181946 (2003-07-01), None
Takehara et al (JP2003012871), English translation.
International Search Report of PCT/JP2005/009824, dated Aug. 9, 2005.

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