Sealed shaft of reduced diameter

Details Sealed shaft of reduced diameter Sealed shaft of reduced diameter

1979-11-01

1981-01-13

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277212FB, 74 18, F16J 304, F16J 1556

Patent

active

042445892

ABSTRACT:
A shaft sealing precluding fluid from moving in a direction longitudinally of the shaft. At the same time the shaft sealing allows a motion of the shaft in axial direction, an inclination of the shaft, and may also allow a rotary motion of the shaft relative to its sealing means. The sealing means is a rolling diaphragm including a clamping flange on one end of the rolling wall thereof. There is a difference of pressure to either side of the rolling wall of the diaphragm. Its shaft has a predetermined outer diameter, and its radially inward directed bottom has a central bore therein equal to the predetermined outer diameter of the shaft. A tubular member having an inner diameter equal to the outer diameter of the shaft is mounted on the shaft. That tubular member has an outer diameter of such thickness as to engage a length of the rolling wall of the rolling diaphragm. The aforementioned tubular member has an end surface in permanent engagement with the bottom of the rolling diaphragm with a cylindrical elastomeric member having a projection conforming substantially with the shape of a portion of reduced diameter of the shaft and engaging under pressure said portion of reduced diameter.

REFERENCES:
patent: 1151227 (1915-08-01), Stokes
patent: 1712003 (1929-05-01), Hubbard
patent: 3582091 (1971-06-01), Smith
patent: 4132422 (1979-01-01), Sankey et al.

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