Flow-regulating device
Abstract
Abstract 1,128,613. Re-vaporizing liquefied gases. BRITISH OXYGEN CO. Ltd. 1 March, 1966 [15 March, 1965], No. 10863/65. Heading F4P. [Also in Division G3] In a heat-exchanger for the production of oxygen enriched air comprising a large number of small tubes mounted vertically between headers comprising upper and lower tube plates, previously cooled incoming air is passed in gaseous form over the lower part of the exchanger on the outside walls of the tubes which are retained at a sufficiently low temperature as to condense some of the air into a liquid mixture of oxygen and nitrogen which is subsequently fed into the top of each tube so that it trickles down the inside walls and is gradually evaporated by incoming air on the outside of the tubes. The cold produced by this evaporation serves to maintain the tube walls at the required low temperature. An adjustable flow regulating device (see Division G3) is fitted into each tube to ensure that the flow in any tube is kept within 10% of the average flow for all of the tubes.
Inventors
- 👤 Michael E Garrett
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) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |