Leo V Quitberg
Engineers in Carlsbad, NM

4196912, Apr 8, 1980

Nov 24, 1978

5/963554

Leo V. Quitberg - Carlsbad NM

Amax Inc. - Greenwich CT

F16J 1534

277 81R

A fluid-pressurized face seal device is provided for use in sealing a rotatable shaft in heavy duty equipment. At least an end portion of the shaft is surrounded by a housing to which said seal device is attached. The seal comprises a cylindrical annular seal carrier surrounding the shaft and mounted to the housing, the housing defining a space adjacent the shaft containing fluid under pressure. The seal carrier has an annular chamber characterized by spaced walls for receiving and supporting annular seal elements therein, the seal carrier containing a first fluidly expandible annular seal element located within the chamber in sealing engagement with the spaced walls. A second seal element is stationarily mounted in the chamber in abutting relationship with the first seal, the second seal having an end portion extending laterally outward of the annular chamber, a rotatable third annular seal element being fixed to the shaft and spaced forward of the second seal element in sealing contact with a face of the third rotatable seal element. A fluid inlet is provided in the cylindrical seal carrier in communication with the annular chamber thereof in which the fluidly expandible seal is located, whereby non-corrosive fluid fed under pressure, e. g. , air, liquid, etc.