(under subclass 170.1) Device wherein the means prevents or retards the flow of fluid between the runner and the fixed element, wherein the means is formed by rotation of the runner, and wherein the means does not function when the runner is stationary.
(1) Note. Such devices usually prevent or retard flow of working fluid* between the runner and the fixed element by establishing regions of differing fluid pressure which inhibit the flow by nature of the differing pressure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
109, for a device with a shaft* connected fluid abutment member in a fluid filled shaft sealing chamber. The fluid in the chamber rotates with the shaft.
168.3, for a device with a screw-type pumping seal for handling working fluid leakage between a runner or shaft and a static part.
