Title: Tire with tread blocks having identical, circular ellipses of inertia

Abstract: The tread of a pneumatic tire is formed with relief blocks and with grooves that delimit the relief blocks and that open onto the edges of the tread. The relief blocks have sections parallel to their surface of contact with the ground which have central ellipses of inertia which are substantially circular and identical. At least some of the relief blocks are formed with a recess and with a straight connecting groove communicating with the recess and with the closest delimiting groove. The delimiting groove provide paths for the removal of water during travel of the tire on a wet road that extend obliquely forward in the direction of travel and facilitate discharge of water at the edges of the tread.

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Inventors: Verdier, Henri (Beauregard-l'Eveque, FR)

Application Number: 483643
Filing Date: 1974-06-27
Publication_date: 1976-12-21
Assignee: Compagnie Generale des Etablissements Michelin, raison sociale Michelin (Clermont-Ferrand (Puy-de-Dome), FR)
Primary Class(es): 152/209.1 152/902
Other Classes:
US Patent Ref:

50840	May, 1917	Kocontes	D12/138.
57071	Feb, 1921	Atkinson	152/209.
62682	Jul, 1923	Weber	D12/139.
3682220	Aug, 1972	Verdier	152/209.

Other Refs: 1,471,437

Jan, 1967	FR

Primary Examiner: Hoffman, Drayton E.
Assistant Examiner:
Attorney: Brumbaugh, Graves, Donohue & Raymond