Pneumatic tire having pitch sequencing

Details Pneumatic tire having pitch sequencing Pneumatic tire having pitch sequencing

1995-09-05

1998-04-28

Maki, Steven D.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

B60C11300

Patent

active

057439745

ABSTRACT:
The present invention relates to a pneumatic tire having a tread with a plurality of load-supporting elements placed above the circumference of the tire. The tread is characterized by a pitch sequence comprising
(a) from 52 to 65 total pitches;
(b) only four different pitch lengths and the lowest indivisible integers used for the pitch ratios for the four pitch lengths are 11-13-15 and 17;
(c) a ratio of the longest pitch to the shortest pitch length not to exceed 1.55;
(d) a ratio of the longer pitch length to the shorter pitch length of any two pitches which precede or follow each other not to exceed 1.37;
(e) there being no instance in the pitch sequence where the shortest pitch length directly precedes or directly follows the longest pitch length;
(f) there being a constant increment in pitch length in the four different pitch lengths as one progresses from the shortest pitch length to the longest pitch length.

REFERENCES:
patent: 1956011 (1934-04-01), Evans
patent: 4327792 (1982-05-01), Landers
patent: 4442499 (1984-04-01), Sekula et al.
patent: 4474223 (1984-10-01), Landers
patent: 4598748 (1986-07-01), Campos et al.
patent: 4788651 (1988-11-01), Parker et al.
patent: 4823853 (1989-04-01), Hitzky
patent: 5027875 (1991-07-01), Kogure
patent: 5062461 (1991-11-01), Noguchi
patent: 5178698 (1993-01-01), Shibata
patent: 5240054 (1993-08-01), Kogure
patent: 5371685 (1994-12-01), Bandel et al.

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