Shaft seal for a check valve

Details Shaft seal for a check valve Shaft seal for a check valve

1974-01-25

1976-02-17

Cline, William R.

Fluid handling

With cleaner, lubrication added to fluid or liquid sealing...

Cleaning or steam sterilizing

137242, 251214, 251298, 251228, 277 24, F16K 4116

Patent

active

039385418

ABSTRACT:
A shaft seal for a check valve having a shaft rotatably disposed within a valve housing. The shaft seal is disposed within a recess defined within the interior of the valve housing between a bushing member and the shaft. Disposition of the seal within the recess permits accumulation of foreign matter precipitate to occur without deleterious clogging of the clearances between the shaft and the bushing, thus permitting free rotational movement of the shaft. A plurality of sharp-edged grooves disposed on the surface of the shaft provide a flow path for guiding the foreign matter precipitate into the recess. A flushing fluid opening is provided within the valve housing to permit introduction of a flushing fluid into the body recess.

REFERENCES:
patent: 2833511 (1958-05-01), Fletcher
patent: 3106220 (1963-10-01), Hose
patent: 3254660 (1966-06-01), Ray
patent: 3669460 (1972-06-01), Wysong

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