US3684458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propulsion and processing apparatus for flowable materials
Assignee: Bridgestone Firestone Inc
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Filing: 1970-01-08
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Granted: 1972-08-15
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Expires: 1990-01-08
Abstract
Abstract A ROTATING STRUCTURE HAVING AN ARRAY OF DISCOIDAL MEMBERS COAXIALLY MOUNTED THEREON TO ROTATE THEREWITH. THE DISCOIDAL MEMBERS ARE INCLINED AWAY FROM NORMALITY TO THE AXIS OF ROTATION, AND THE MOST REARWARD POINTS OF THE PERIPHERIES OF THE SUCCESSIVE DISCS ARE DISPOSED ALONG A HELICOIDAL LINE COAXIAL WITH THE ROTATION OF THE STRUCTURE, WHICH DISPOSITION OF THE DISCS CAUSES THE STRUCTURE AS A WHOLE TO EMULATE THE ACTION OF A SCREW IN THAT THE FLOWABLE MATERIAL IS PROPELLED THROUGH THE APPARATUS. PREFERABLY, THE DISCOIDAL MEMBERS ARE FORAMINATED, E.G. FORMED OF PERFORATED SHEETS OR SCREENING MATERIAL.
Inventors
- 👤 William L Mccammon
- 👤 George E Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:35
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/60; B01F27/73; C; C08; C08G; C08G63/00; C08G63/78; C08G63/785; B01F27/05; B01F27/07; B01F27/072; B01F27/0723
Claims Analysis
Total Claims: 0
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References 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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |