Patent US5172583A successfully refreshed from Google Patents.
US5172583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal tester
Assignee: Alcatel CIT SA
•
Filing: 1991-09-12
•
Granted: 1992-12-22
•
Expires: 2011-09-12
Abstract
Abstract A leak tester comprises a vacuum chamber in which a device under test is placed and a helium leakage detector connected to the vacuum chamber. The device under test is adapted to be filled with helium or with air-helium mixture through an exterior pipe entering the vacuum chamber and incorporating a coupling for connecting it to the device under test. The coupling is surrounded by a collector chamber connected by a pipe to a vacuum pump outside the vacuum chamber.
Inventors
- 👤 Jacques Tallon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:05
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/20; G01M3/202
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
Leak tester comprising a vacuum chamber in which a device under test is placed and a helium leakage detector connected to said vacuum chamber, said device under test being adapted to be filled with helium or with air-helium mixture through an exterior pipe entering said vacuum chamber and incorporating a coupling for connecting it to said device under test and said coupling being surrounded by a collector chamber connected by a pipe to a vacuum pump outside said vacuum chamber.
Claim 2
Dependent Claim
80 words
Leak tester comprising a vacuum chamber in which a device under test is placed and a helium leakage detector connected to said vacuum chamber, said device under test being adapted to be filled with helium or with air-helium mixture through an exterior pipe entering said vacuum chamber and incorporating a coupling for connecting it to said device under test and said coupling being surrounded by a collector chamber connected by a pipe to a vacuum pump outside said vacuum chamber.
References Cited (Backward Citations)
US2255921A
Cited
US3577769A
Cited
US3762212A
Cited
DE2728837A1
Cited
GB2055210A
Cited
US4282743A
Cited
US4553435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-22 | 1996-06-22 | 1996-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-22 | 2000-06-22 | 2000-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-22 | 2004-06-22 | 2004-12-22 | $7700.00 | Window Closed / Lapsed |