Pneumatic tire with tread having lateral grooves provided...

Details Pneumatic tire with tread having lateral grooves provided... Pneumatic tire with tread having lateral grooves provided...

2006-07-11

2010-06-01

Maki, Steven D (Department: 1791)

Resilient tires and wheels

Tires, resilient

Anti-skid devices

C152S902000

Reexamination Certificate

active

07726369

ABSTRACT:
A pneumatic tire comprises a tread portion provided with at least two circumferential grooves and lateral grooves extending from the circumferential grooves so as to form blocks which are circumferentially divided by the lateral grooves and arranged in at least three circumferential rows axially divided by said at least two circumferential grooves. Each of the lateral grooves is provided with a tie-bar rising from the groove bottom to a certain height as to connect the opposite groove walls with each other. The tie-bars in the lateral grooves extend towards the adjacent circumferential grooves but terminate before the circumferential grooves so as to provide certain distances therebetween, and the distances are gradually decreased from the axially outside to the axially inside of the tread portion. The inclination angles of the lateral grooves are gradually decreased from the axially outside to the axially inside of the tread portion.

REFERENCES:
patent: 3682220 (1972-08-01), Verdier
patent: 4223712 (1980-09-01), Iwata et al.
patent: 5316062 (1994-05-01), Lurois
patent: 5482099 (1996-01-01), Kajiwara et al.
patent: 5580404 (1996-12-01), Hitzky
patent: 6695024 (2004-02-01), Neugebauer et al.
patent: 7484542 (2009-02-01), Sundkvist et al.
patent: 19548733 (1997-06-01), None
patent: 02-003501 (1990-01-01), None
patent: 11-245628 (1999-09-01), None
patent: 2002-67624 (2002-03-01), None

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