Patent US4048718A successfully refreshed from Google Patents.
Patent US3307487A successfully refreshed from Google Patents.
US3307487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump, compressor and the like
Assignee: Individual
•
Filing: 1966-10-03
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Granted: 1967-03-07
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Expires: 1986-10-03
Abstract
No abstract record available.
Inventors
- 👤 Steadman Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:46
CPC Classifications
F; F04; F04C; F04C9/00; F04C9/002; F02; F02B; F02B53/00; F02B2730/00; F02B2730/01; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN A ROTARY PUMP, COMPRESSOR AND THE LIKE, COMPRISING A CASING HAVING A ROTOR CHAMBER PROVIDED WITH RADIALLY OUTWARDLY CONVERGING CHAMBER WALLS CONNECTED BY A CURVED PERIPHERAL WALL, SAID CHAMBER BEING PROVIDED WITH BEARING BOSSES ON ITS CASING WALLS ALIGNED WITH RESPECT TO ONE ANOTHER AND EXTENDING AT AN ACUTE ANGLE TO THE CENTRAL AXIS OF SAID CASING, A ROTARY SHAFT SUPPORTED IN SAID BEARING BOSSES, A ROTARY DISC MOUNTED IN SAID CHAMBER AND SUPPORTED ON A HUB PORTION SECURED TO SAID SHAFT HAVING A SPHERICALLY SHAPED OPPOSED HUB PORTION
Claim 2
Dependent Claim
90 words
IN A ROTARY PUMP, COMPRESSOR AND THE LIKE, COMPRISING A CASING HAVING A ROTOR CHAMBER PROVIDED WITH RADIALLY OUTWARDLY CONVERGING CHAMBER WALLS CONNECTED BY A CURVED PERIPHERAL WALL, SAID CHAMBER BEING PROVIDED WITH BEARING BOSSES ON ITS CASING WALLS ALIGNED WITH RESPECT TO ONE ANOTHER AND EXTENDING AT AN ACUTE ANGLE TO THE CENTRAL AXIS OF SAID CASING, A ROTARY SHAFT SUPPORTED IN SAID BEARING BOSSES, A ROTARY DISC MOUNTED IN SAID CHAMBER AND SUPPORTED ON A HUB PORTION SECURED TO SAID SHAFT HAVING A SPHERICALLY SHAPED OPPOSED HUB PORTION
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |