Nok Corporation

Tsuyoshi Kanda

Junichi Nakayama

Toshihiro Mukaida

Kazuo Yamashita

Atsushi Saito

By providing a projectionat the root of a seal lip, the mechanical loss caused by the seal lip is reduced while restraining the turn-over of the seal lip, while maintaining a stable sealing performance by letting the first side surfaceor the second side surfaceof this projectionexhibit a suction function of returning the fluid that has leaked from the lip tip end of the seal lipto the sealing fluid side O when the shaft and the seal lipare relatively rotated.

Sealing apparatus

A shaft part is coaxially provided within a pressure release port provided in a sealing plate sealed to an opening portion of a case for a condenser or a battery, a valve body closely fitted and fixed within the pressure release port has a seal lip which is directed toward the outside of a pressure container and is closely contacted with an outer peripheral surface of the shaft part with predetermined tensional force, and in the case that internal pressure of the case is increased more than a predetermined value, the seal lip is operated so as to open the valve, thereby releasing the internal pressure to the atmospheric air.

Pressure release valve

A unitized oil seal (10) includes a wear sleeve element (12) and a seal element (14). The wear sleeve element (12) is configured to include an axially outwardly and radially inwardly tapered dust sealing surface (38). The seal element (14) is provided with a dust sealing lip (82) sealingly engaging the dust sealing surface (38). The dust sealing lip (82) is configured to flare out axially outwardly and radially outwardly so that the point of contact thereof with the dust sealing surface (38) is offset axially outwardly from the plane of an abutment surface (40) of the wear sleeve element. A high degree of dirt exclusion capability is achieved. The seal element (14) includes primary and auxiliary seal lips (74, 76) which are brought into sealing engagement with the wear sleeve without a conventional garter spring.

Growing community of inventors

Fukushima, Japan

Tsuyoshi Kanda