Bridgestone Corporation

Bridgestone Tire Company Limited

Fujio Ohkawa

Hiroyuki Maeda

Shiro Anzai

Nobuyuki Kataoka

Takuya Takahashi

Akira Higashidani

A diaphragm type air spring is disclosed, which comprises large and small piston members integrally connected to each other. Large and small outer shells are coaxially arranged with the piston members and integrally connected to each other with a common partition. Each of the large and small outer shells has a diameter larger than that of each of the respective large and small piston members. A diaphragm airtightly connects each of the large and small outer shells to each of the respective large and small piston members. An orifice is formed in the partition so as to communicate a small air chamber defined by the small piston member, small outer shell, diaphragm and partition with a large air chamber defined by the large piston member, large outer shell, diaphragm and partition, whereby a load of a vibration system is born with the large outer shell integrally connected thereto.

Diaphragm type air springs

Novel abrasion resistant rubber compositions are disclosed. The compositions are prepared by curing the mixtures comprising a diene elastomer, an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, a divalent metal compound, and an organic peroxide. When an unpolymerizable carboxylic acid is added to the mixture, the mechanical properties of the composition are improved. The addition of a carbon black to the mixtures brings about the improvement of weather-proofing property of the composition. The compositions are useful for the rubber stock of solid tires, snow removing plates and the like.

Abrasion resistant rubber compositions

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Yokohama, Japan

Fujio Ohkawa