The Goodyear & Tire Rubber Company

Robert L Crump

Richard M Beeghly

William H Legas

Robert Edgar Boore

Ronald Thomas Harris

Edward L Montgomery

Lawrence B Hurst, Jr

William P Cundiff

Samuel Eubanks Reckley

Roger Ray Riffle

Lawrence B Hurst

Deloris J Schad

Herbert H Schad

A pneumatic tire 20 is disclosed. The tire 20 has a carcass 21, a belt reinforcement member 26 disposed radially outwardly of the carcass 21, an annular tread 32 disposed radially outwardly of the belt reinforcing member 26, the tread 32 having a net-to-gross ratio of less than 35%. The tread 32 comprises an inner tread 34 and a plurality of traction lugs 50. At least 25% of the lugs 50 have aligned axially inner and axially outer portion is separated by a notch 60 extending between the leading edges 52 and trailing edges 54 and having a depth (n.sub.h) greater than 50% of the radial height (l.sub.h) of the lug 50 at a center of the notch along the leading edge 52, the center being located at a position 40% to 60% of the lug length (l.sub.L) from the axially inner end 53. Both the axially outer and inner portions of the notched lugs 50 have axially inner ends including enlarged lug heads. The tread lugs 50 made according to the present invention have increased flexibility which can reduce soil compaction while improving traction.

Pneumatic tire for use on agricultural tractors and other like vehicles

An improved tire tread having a net-to-gross ratio greater than 50% and a plurality of grooves defined by a base spaced between road contacting ribs is described herein. The improved tread is characterized by at least one circumferentially extending radially deep groove having a circumferentially continuous projection in the base of the groove. The projection has height measured from the base of the groove radially outward of less than one-sixth of the depth of the groove. The projection has a thickness of greater than one-half the height of the projection. The projection is axially spaced from the adjacent road contacting ribs. The projection is connected to the adjacent ribs by a plurality of braces. The braces are of substantially the same height as the projection. Each brace is spaced circumferentially from adjacent braces and connected to both sidewalls of the circumferentially extending adjacent ribs.

Tread with improved groove design

Tire tread and buttress

Tire

A pneumatic tire (10) has a tread (12) has a continuous center rib (24) extending circumferentially about the tread. A set of traction lugs (30,32) extend inwardly from each axial edge of the tread. Independent traction elements (58,60) are disposed circumferentially between circumferentially next adjacent traction lugs. The center rib (24) and the traction lugs (30,32) are substantially the same height, but the independent traction elements (58,60) have a lower height. An axially oriented arc of the tread has a radius such that a footprint of the tire has a maximum axial width that is in the range of 40% to 80% of the arc width of the tread.

Tractor tire tread

Growing community of inventors

Cumberland, MD, United States of America

Robert L Crump