Koyo Seiko Company, Ltd.

Teruo Ojima

Michitoshi Mitsumaru

Keiichi Furukawa

Hiroyoshi Yasui

Shiro Sawa

An oil seal comprises a seal body, a lip, and a plurality of ribs provided on a bevel facing a space without oil when the inner circumference of the lip is utilized. The plurality of ribs are included an angle with respect to the rotational direction of a shaft. Rear ribs with respect to the rotatational direction are set longer than the front ribs. Effecive oil recovery is enabled by the rib structure from the front ribs to the rear ribs.

Bi-directional oil seal with leakage recovering rib formations

A water pump comprising a pump shaft having an impeller and mounted on one end of a pump housing with a seal provided therebetween, a stationary shaft in alignment with the pump shaft and supported at its one end by the other end of the pump housing, a pulley for reeving a belt therearound provided around the outer ring of an antifriction bearing mounted around the stationary shaft within the housing, and a water-tight flange positioned between the seal and the bearing and fixedly provided between the end portion of the pump shaft and the end portion of the pulley.

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Osaka, Japan

Teruo Ojima