US 2007/0163690 A1Published application

Pneumatic tire

AssigneeSumitomo Rubber Industries, Ltd.

InventorsHideo Nobuchika, Mamoru Uchida, Youjirou Miki, Syuichi Yamamori

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Abstract

A pneumatic tire is provided with an electrically conductive path extending continuously from a position in the rim contacting surface to a position in the ground contacting surface through a sidewall portion, wherein a sidewall rubber is a high-performance rubber compound and almost-insulative, having a volume resistivity of not less than 1×10ˆ8 ohm cm. The electrically conductive path includes a helical path made of an electrically conductive rubber having a volume resistivity of not more than 1×10ˆ7 ohm cm. The helical path is disposed axially inside the sidewall rubber and extends spirally around the tire rotational axis. Preferably, the tread rubber, clinch rubber and carcass topping rubber are also almost-insulative high-performance rubber compounds.

Claims9

Dependent claims

A pneumatic tire comprising

a tread portion having a ground contacting surface,
a pair of bead portions each having a rim contacting surface,
a pair of sidewall portions extending between the tread portion and bead portions, and
an electrically conductive path extending continuously from a position in the rim contacting surface to a position in the ground contacting surface through one of the sidewall portions, wherein
a sidewall rubber having a volume resistivity of not less than 1×10ˆ8 ohm cm, is disposed in said one of the sidewall portions to define an outer surface of the sidewall portion,
said electrically conductive path includes a helical path made of an electrically conductive rubber having a volume resistivity of not more than 1×10ˆ7 ohm cm, and the helical path is disposed axially inside said sidewall rubber and extends spirally around the tire rotational axis.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/645,650Filed 27 Dec 2006
Priority: JP 2005-37951928 Dec 2005
Published: 19 Jul 2007
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B60C 19/08
Tyre parts or constructions not otherwise provided for: electric-charge-dissipating arrangements
B29D 2030/526
Unvulcanised treads, e.g. on used tyres; Retreading: the tread comprising means for discharging the electrostatic charge, e.g. conductive elements…
Y10S 152/02
Resilient tires and wheels: static discharge
Y10T 152/10828
Characterized by the structure of the bead portion of the tire: chafer or sealing strips