Seal for rotating torque tube with seal valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 5, 1991
Issued Date -
N/A
app pub date -
Mar 21, 1990
filing date -
Sep 26, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for establishing a fluid-tight seal around a rotatable drive shaft has a housing which is formed with a straight bore through which the drive shaft is positioned. The bore has a narrow portion, a wide portion and a tapered portion between the narrow and wide portions. A beveled annular seal is positioned in the wide portion of the bore around the drive shaft with the bevel abutting the side of the tapered portion of the bore. An actuator is engaged to the housing and is movable to urge the seal against the tapered portion of the bore to constrict the seal around the drive shaft and establish a fluid-tight seal between the drive shaft and the annular seal. The housing further includes an expanded conforming portion. A flexible seal valve is positioned in the expanded portion to receive the drive shaft. A seal valve has a deformable wedge-shaped portion terminating in a normally closed slit when the shaft is removed. The seal valve prevents leakage when the shaft is inserted into or withdrawn from the housing.
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