US3304062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for mixing and compacting material
Assignee: Black Clawson Co
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Filing: 1964-09-23
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Granted: 1967-02-14
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Expires: 1984-09-23
Abstract
No abstract record available.
Inventors
- 👤 Frechtling Walton Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:39
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/42; B29B7/421; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/395; B29C48/50; B29C48/505; B29C48/56; B29C48/68; B29C48/685; B29C48/686; B29C48/92; D; D21; D21F; D21F1/00; D21F1/66; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/9258; B29C2948/926; B29C2948/92704; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C2948/92885; B29C2948/92904; B29C48/03; B29C48/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
APPARATUS FOR MIXING AND COMPACTING MATERIAL, COMPRISING A HOUSING HAVING IN INLET END AND A DISCHARGE END AND A CONTINUOUS HELICALLY FORMED INTERNAL WORKING SURFACE RADIALLY DISPOSED ABOUT A CENTRAL AXIS AND EXTENDING BETWEEN SAID ENDS, SAID WORKING SURFACE WITHIN SAID HOUSING BEING NO GREATER IN DIAMETER AT SAID DISCHARGE END OF SAID HOUSING THAN AT SAID INLET END, SAID SURFACE BEING ADJOINED BY A GENERALLY AXIALLY EXTENDING SPIRAL FACE TO DEFINE A STEP-LIKE CROSS-SECTIONAL CONFIGURATION, AN IMPELLER ROTATABLY MOUNTED WITHIN SAID HOUSING AND INCLUDING AN EXTERNAL HELICAL WORKING SURFACE GENERALLY RADIALLY EXTENDING AND ADJOINED BY A GENERALLY AXIALLY EXTENDING SPIRAL FACE TO DEFINE A STEP-LIKE CONFIGURATION FORMED SUBSTANTIALLY THE SAME AS BUT IN THE REVERSE SENSE FROM SAID WORKING SURFACE WITHIN SAID HOUSING, CORRESPONDING SAID WORKING SURFACES AND SAID FACES WITHIN SAID HOUSING AND ON SAID IMPELLER COOPERATING TO FORM SUBSTANTIALLY A TRIANGLE IN AXIAL CROSS-SECTION WITH THE SHEAR LINE DEFINED BY SAID IMPELLER AND SAID HOUSING, AND POWER MEANS FOR DRIVING SAID IMPELLER WITHIN SAID HOUSING.
Claim 2
Dependent Claim
168 words
APPARATUS FOR MIXING AND COMPACTING MATERIAL, COMPRISING A HOUSING HAVING IN INLET END AND A DISCHARGE END AND A CONTINUOUS HELICALLY FORMED INTERNAL WORKING SURFACE RADIALLY DISPOSED ABOUT A CENTRAL AXIS AND EXTENDING BETWEEN SAID ENDS, SAID WORKING SURFACE WITHIN SAID HOUSING BEING NO GREATER IN DIAMETER AT SAID DISCHARGE END OF SAID HOUSING THAN AT SAID INLET END, SAID SURFACE BEING ADJOINED BY A GENERALLY AXIALLY EXTENDING SPIRAL FACE TO DEFINE A STEP-LIKE CROSS-SECTIONAL CONFIGURATION, AN IMPELLER ROTATABLY MOUNTED WITHIN SAID HOUSING AND INCLUDING AN EXTERNAL HELICAL WORKING SURFACE GENERALLY RADIALLY EXTENDING AND ADJOINED BY A GENERALLY AXIALLY EXTENDING SPIRAL FACE TO DEFINE A STEP-LIKE CONFIGURATION FORMED SUBSTANTIALLY THE SAME AS BUT IN THE REVERSE SENSE FROM SAID WORKING SURFACE WITHIN SAID HOUSING, CORRESPONDING SAID WORKING SURFACES AND SAID FACES WITHIN SAID HOUSING AND ON SAID IMPELLER COOPERATING TO FORM SUBSTANTIALLY A TRIANGLE IN AXIAL CROSS-SECTION WITH THE SHEAR LINE DEFINED BY SAID IMPELLER AND SAID HOUSING, AND POWER MEANS FOR DRIVING SAID IMPELLER WITHIN SAID HOUSING.
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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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |