Bushings
AssigneeThe General Tire & Rubber Company
InventorTiong H. Kuan
Life of this patent
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Abstract
A resilient bushing suitable for automobiles and other vehicles is disclosed wherein the rubber compound of said bushing contains carbon blacks of different particle sizes, surface areas and structures.
Claims8
A resilient bushing exhibiting improved fatigue life and having an annular molded vulcanized rubber compound insert in compressed relation between a substantially rigid cylindrical inner member and a substantially rigid cylindrical outer member wherein said rubber compound contains (A) from about 10 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 15 to 50 m.mu., a surface area of from about 60 to 140 m.sup.2 /g and a DBPA of from about 80 to 135 cc/100 g and (B) from about 5 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 50 to 85 m.mu., a surface area of from abut 20 to 50 m.sup.2 /g and a DBPA of from about 50 to 80 cc/100 g and where the rubber of said compound is selected from the group consisting of natural rubber and polyisoprene rubber and mixtures thereof.
A vulcanizable unvulcanized rubber compound containing (A) from about 10 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 15 to 50 m.mu., a surface area of from about 60 to 140 m.sup.2 /g and a DBPA of from about 80 to 135 cc/100 g and (B) from about 5 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 50 to 85 m.mu., a surface area of from about 20 to 50 m.sup.2 /g and a DBPA of from about 50 to 80 cc/100 g.
A vulcanized rubber compound containing (A) from about 10 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 15 to 50 m.mu., a surface area of from about 60 to 140 m.sup.2 /g and a DBPA of from about 80 to 135 cc/100 g and (B) from about 5 to 30 phr of a reinforcing furnace carbon black having a particle size of from about 50 to 85 m.mu., a surface area of from about 20 to 50 m.sup.2 /g and a DBPA of from about 50 to 80 cc/100 g.
Dependencies are inferred from the claim text.