Pneumatic tire with tread portion having zigzag sipes

Details Pneumatic tire with tread portion having zigzag sipes Pneumatic tire with tread portion having zigzag sipes

2007-10-16

2007-10-16

Maki, Steven D. (Department: 1733)

Resilient tires and wheels

Tires, resilient

Anti-skid devices

C152S209230, C152S902000, C152SDIG020

Reexamination Certificate

active

10954176

ABSTRACT:
It is an object of the present invention to improve the running performance on snowy and icy roads, and for this purpose, blocks provided with sipes are formed at a tread portion. The sipes include an open top end that opens at a block surface and a bottom, and a configuration of the sipes in a plane parallel with the block surface comprises a zigzag part extending in the length direction of the sipes. The zigzag part displaces upon turning back to one side and to the other side in a length direction of the sipes in the course from the open top end to the bottom. At least one block includes a first sipe and a second sipe which depths of the turn-back points of displacement from the open top end and/or positions of the turn-back points of displacement in the length direction differ from each other.

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