Water turbines and pumps
Abstract
Abstract THE INVENTION RELATES TO WATER TURBINES AND PUMPS. THE INVENTION PROVIDES A WATER SEALING MEANS FOR REDUCING TO A LOW VALUE THE ESCAPE OF WATER FROM THE WATER FLOW DUCT OF SUCH A MACHINE BETWEEN COOPERATING STATIONARY AND ROTATING PARTS THEREOF. IN SUCH SEALING MEANS ONE OF THE SAID PARTS CARRIES A RIGID CIRCULAR SEALING SURFACE, AND THE OTHER CARRIES A FLEXIBLE COMPLIANT CIRCULAR SEALING SURFACE WHICH IS AUTOMATICALLY CONTROLLED AT ALL PARTS AROUND ITS CIRCUMFERENCE TO LIE CLOSELY ADJACENT BUT NOT TOUCHING THE RIGID SEALING SURFACE, BY TWO OPPOSING FORCES PROVIDES RESPECTIVELY BY A BIASING FLUID UNDER PRESSURE AND BY THE WATER ESCAPING BETWEEN THE RIGID AND COMPLIANT SEALING SURFACES.
Inventors
- 👤 Michael Braikevitch
- 👤 Emil Goldwag
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |