Double-pipe line flange connection
Abstract
Abstract 1,181,155. Pipe joints. VICKERS-ZIMMER A.G.-PLANUNG UND BAU VON INDUSTRIEANLAGEN. 3] Aug., 1967 [16 Sept., 1966], No. 39811/67. Heading F2G. A flange connection comprises a first inner passage 2, Fig. 1, for a first inner pipeline 1, 1<SP>1</SP>, at least one outer subsidiary passage 4 for a second outer pipeline 3, 3<SP>1</SP>, an annular space 8 enclosing the first passage 4 and seals 14, 15 16 disposed around the first inner passage, the space and the second subsidiary passage, respectively. The seals comprise springs and sealing inserts in grooves. The annular space 8 communicates with atmosphere through bore 9. Two passages 4 are disposed symmetrically about passage 2 leading into annular grooves 7, 7<SP>1</SP>.
Inventors
- 👤 Willi Keller
- 👤 Heinrich Davin
- 👤 Hans Kell
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |