US3236499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential pressure control of sealing fluid for rotary fluid machines
Assignee: Library and Archives Canada
•
Filing: 1964-06-05
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Granted: 1966-02-22
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Expires: 1984-06-05
Abstract
No abstract record available.
Inventors
- 👤 Victor G M Chatfield
- 👤 Kanger Feodor
- 👤 Robert S Sproule
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:41
CPC Classifications
F; F03; F03B; F03B11/00; F03B11/006; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN A ROTARY HYDRAULIC MACHINE INCLUDING A SHROUDED ROTOR HAVING PERIPHERAL PORTIONS OF DIFFERENT DIAMETERS, A STATOR STRUCTURE ENCLOSING THE ROTOR AND HAVING A WATER INLET THROUGH WHICH WATER IS DELIVERED TO THE ROTOR AND A WATER OUTLET THROUGH WHICH WATER PASSES FROM THE ROTOR, THE OUTER SURFACE OF SAID SHROUDED ROTOR BEING SPACED FROM OPPOSING WALLS OF THE STATOR STRUCTURE TO PROVIDE A CIRCUMFERENTIALLY EXTENDING SHROUD SPACE BETWEEN THE ROTOR AND THE STATOR STRUCTURE, MEANS FOR INTRODUCING AIR UNDER PRESSURE INTO SAID SHROUD SPACE TO REDUCE FLUID FRICTION ON SAID ROTOR, CENTRIFUGAL SEPARATION MEANS POSITIONED ADJACENT THE PERIPHERAL EDGE OF SAID SHROUD SPACE
Claim 2
Dependent Claim
104 words
IN A ROTARY HYDRAULIC MACHINE INCLUDING A SHROUDED ROTOR HAVING PERIPHERAL PORTIONS OF DIFFERENT DIAMETERS, A STATOR STRUCTURE ENCLOSING THE ROTOR AND HAVING A WATER INLET THROUGH WHICH WATER IS DELIVERED TO THE ROTOR AND A WATER OUTLET THROUGH WHICH WATER PASSES FROM THE ROTOR, THE OUTER SURFACE OF SAID SHROUDED ROTOR BEING SPACED FROM OPPOSING WALLS OF THE STATOR STRUCTURE TO PROVIDE A CIRCUMFERENTIALLY EXTENDING SHROUD SPACE BETWEEN THE ROTOR AND THE STATOR STRUCTURE, MEANS FOR INTRODUCING AIR UNDER PRESSURE INTO SAID SHROUD SPACE TO REDUCE FLUID FRICTION ON SAID ROTOR, CENTRIFUGAL SEPARATION MEANS POSITIONED ADJACENT THE PERIPHERAL EDGE OF SAID SHROUD SPACE
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |