Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1978-11-24
1980-04-08
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 27, 277205, F16J 1534
Patent
active
041969120
ABSTRACT:
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., through said fluid inlet into the annular chamber causes the first seal to expand and provide a tight seal against the walls of said annular chamber and also maintain continuous pressure against the rotatable third seal member via the abutting second seal member.
REFERENCES:
patent: 2902301 (1959-09-01), Daeschner
patent: 3179422 (1965-04-01), Phillips
patent: 3294409 (1966-12-01), Burtis
patent: 3606350 (1971-09-01), Grauelle
patent: 4104169 (1978-08-01), Muller
Amax Inc.
Ciomek Michael A.
Kalil Eugene J.
Smith Robert I.
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