Pneumatic tires with decreasingly inclined tread grooves

Details Pneumatic tires with decreasingly inclined tread grooves Pneumatic tires with decreasingly inclined tread grooves

1991-11-29

1993-06-29

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

B60C 1111

Patent

active

052230597

ABSTRACT:
A pneumatic tire comprises a tread having at least one circumferential groove formed in a central zone of a treading surface thereof, and a plurality of inclined grooves formed in at least one of side zones which are axially adjacent to axially opposite sides of said central zone and each have a width equal to substantially 1/4 of that of said treading surface of the tread. A plurality of the inclined grooves extend obliquely upwardly from a side of the central zone toward an end of the tread as viewed from a front face of the tire in the state that the tire is fitted to a vehicle, and each of a plurality of the inclined grooves are opened to the end of the tread. An angle of each of a plurality of the inclined grooves is gradually decreased as the groove goes away from the central zone, this angle being an acute angle defined by the inclined groove and a circumferential straight line on an axially outer side of the tire.

REFERENCES:
patent: D278893 (1985-05-01), Lash
patent: D283499 (1986-04-01), Hammond
patent: D283501 (1986-04-01), Hitzky
patent: D312232 (1990-11-01), Wallet et al.
patent: D316532 (1991-04-01), Tsuda et al.
patent: D326440 (1992-05-01), Kolowski et al.
patent: 2154290 (1939-04-01), Snyder
patent: 3645314 (1972-02-01), Verdier
patent: 4962801 (1990-10-01), Tsuda

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