Hitachi Construction Machinery Co., Ltd.

Mitsui Petrochemical Industries, Ltd.

Mitsubishi Petrochemical Company Limited

Takahiro Sato

Hiroyuki Morikawa

Takeshi Shinohara

Isao Okada

Yuutarou Iwabuchi

Hiroki Yamamoto

Daisuke Takeshita

Akinori Kondo

A traveling device () is provided with a cylindrical spindle (), a rotation shaft () that is disposed on an inner peripheral side of the spindle () and is rotated by a traveling motor (), a wheel attaching cylinder () that is rotatably disposed on an outer peripheral side of the spindle () and to which a wheel () is attached and in the inside of which the lubricating oil (L) is accommodated, a gear reduction mechanism () that decelerates the rotation of the rotation shaft () and transmits the decelerated rotation to the wheel attaching cylinder (), a retainer () that is provided with a bearing fitting hole (A) and is disposed on the inner peripheral side of the spindle (), and a bearing () that is attached to the retainer () and supports the rotation shaft (). A collar part (D) that abuts on the bearing () is disposed on the surface of the retainer () at the traveling motor ()-side, and an oil reservoir plate () is disposed on the surface of the retainer () at the gear reduction mechanism ()-side, wherein the oil reservoir plate () forms an oil reservoir part () of the lubricating oil (L) together with the collar part (D) and an inner peripheral surface (C) of the bearing fitting hole (A).

Traveling device for wheeled vehicle

A process for producing isoprene trimers by the catalytic oligomerization of isoprene which comprises effecting said oligomerization in the presence of a catalyst system comprising:

Process for producing isoprene trimers

A process for producing 2,6-dimethyl-1,3,6-octatriene by dimerizing isoprene in the presence of a novel catalyst composition, which comprises: (A) a zirconium component represented by the formula: Zr(OR).sub.n Cl.sub.4.sub.-n wherein R is a chlorinated alkyl group containing two to 20 carbon atoms or a chlorinated cycloalkyl group containing three to 20 carbon atoms, and n is an integer of 1 to 4; (B) an aluminum component represented by the formula: AlR'.sub.m Cl.sub.3.sub.-m wherein R' is an alkyl group containing one to 10 carbon atoms, a cycloalkyl group containing three to 10 carbon atoms, or an aryl group, and m is 1.5 or 2; and (C) a coordinating component.

Process for production of 2,6-dimethyl-1,3,6-octatriene

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Ibaraki, Japan

Takahiro Sato