Apparatus and method for testing perviousness
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United States of America Patent
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Sep 17, 2002
Grant Date -
N/A
app pub date -
Feb 25, 2000
filing date -
Mar 10, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
For determining the adequate perviousness of venting tube nipples (4) on fuel tanks (3) made of plastics material a test duct (12) is connected to the nipple (4) and air drawn into the test duct (12) from the tank (3). From measuring, the partial vacuum of e.g. approx. 5 mbar or the volume flow rate in the test duct (12) it can be determined whether the nipple (4) and its joint (9) to the tank (3) are sufficiently permeable. This test is very precise and silent and needs only little consumption of compressed air. Thereby the load on the sealing seat (14) between test duct (12) and nipple (4) is only slight.
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