Leak detector
Abstract
Abstract A GAS LEAK DETECTING SYSTEM WHICH INCLUDES A CHAMBER TO BE TESTED OR TO RECEIVE THEREIN ARTICLES TO BE TESTED FOR GAS TIGHTNESS UNDER VACUUM CONDITIONS. A TURBO-PUMP HAVING TWO COMPRESSOR PUMP SECTIONS, EACH HAVING INLET AND OUTLET ENDS, THE PROVIDED. THE TURBO-PUMP IN ONE SECTION EVACUATES THE VESSEL THROUGH A GAS FLOW LINE COMNECTED TO A VACUUM FORE PUMP, AND THE OTHER TURBO-PUMP IS AN ANALYZER PUMP HAVING A LOW MOLECULAR WEIGHT GAS DETECTOR OPERATIVELY ASSOCIATED WITH ITS INLET END, AND ITS OUTLET END CONNECTED TO THE GAS FLOW LINE EXTENDING BETWEEN THE OTHER TURBO-PUMP AND THE FORE PUMP. CONTROL MEANS ARE POVIDED IN THE GAS FLOW LINE DOWNSTREAM OF THIS CONNECTION, AND, UNDER PROPER CONDITIONS, THE ANALYZER PUMP EVACUATES HIGH WEIGHT MOLECULAR GASES FROM THE INLET END THEREOF WHILE PERMITTING THE LOW MOLECULAR WEIGHT TRACE GAS TO ENTER THE INLET AREA FOR ACCURATE DETECTION AT A CONTROLLABLY LOW PRESSURE LEVEL.
Inventors
- 👤 Wilhelm F Schrader
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |