Method of judging the lip turnover of a seal and apparatus for i

Details Method of judging the lip turnover of a seal and apparatus for i Method of judging the lip turnover of a seal and apparatus for i

1997-12-16

2000-04-25

Noori, Max

Measuring and testing

Frictional resistance, coefficient or characteristics

G01N 1902

Patent

active

060530294

ABSTRACT:
When a seal is inserted onto a shaft, load applied to a chuck is detected by a load cell, and based on the detected load, the turnover of a lip is judged. More specifically, an operation of inserting and pulling out the seal is performed several times on the shaft. Pull-out force is detected at the time of the last pull-out operation and insertion force is detected at the time of the last insertion operation. If the detected value is greater than a predetermined value, it is judged that the lip has been turned over. Also, a ratio between the aforementioned pull-out force and insertion force is computed. If the value of the computed ratio is less than a predetermined value, it is judged that the lip has been turned over.

REFERENCES:
patent: 3176497 (1965-04-01), Dega
patent: 3313141 (1967-04-01), Jagger et al.
patent: 4817255 (1989-04-01), Shaw, Jr.
patent: 5038601 (1991-08-01), Renneker
patent: 5410920 (1995-05-01), Westwick
patent: 5814717 (1998-09-01), Antonini et al.

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