US3130879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary feed valve
Assignee: Black Clawson Co
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Filing: 1960-08-26
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Granted: 1964-04-28
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Expires: 1980-08-26
Abstract
No abstract record available.
Inventors
- 👤 Hjalmar S Messing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:16
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/46; B65G53/4608; B65G53/4625; B65G53/4633; B65G53/4641; D; D21; D21C; D21C7/00; D21C7/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
127 words
A ROTARY VALVE COMPRISING A VALVE BODY, MEANS IN SAID VALVE BODY DEFINING A CYLINDRICAL CAVITY AXIALLY THEREOF, SAID BODY HAVING AN INLET OPENING INTO SAID CAVITY AND A DISCHARGE OUTLET LEADING THEREFROM, A ROTOR ROTATABLY RECEIVED IN SAID CAVITY AND INCLUDING A SPIDER DEFINING ALTERNATE DEEP AND SHALLOW BUCKETS OF DIFFERING RADIAL DEPTHS ARRANGED TO RECEIVE MATERIAL AT SAID INLET AND TO DISCHARGE MATERIAL AT SAID OUTLET UPON THE ROTATION OF SAID ROTOR, THE MATERIAL OF SAID SPIDER BEING DISTRIBUTED WITH A SUBSTANTIAL PORTION THEREOF LYING IN THE OUTER HALF OF THE ROTOR RADIUS TO RESIST BENDING BY PRESSURE AT SAID OUTLET, SAID BUCKETS HAVING SUBSTANTIALLY CYLINDRICAL BOTTOMS WITH THE BOTTOMS OF SAID DEEP BUCKETS HAVING A SMALLER RADIUS THAN THE BOTTOMS OF SAID SHALLOW BUCKETS.
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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |