US3551968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feeding device for concrete pipe machine
Assignee: Hydrotile Machinery Co
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Filing: 1968-03-01
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Granted: 1971-01-05
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Expires: 1988-03-01
Abstract
Abstract A PACKER HEAD CONCRETE PIPE MACHINE FOR MAKING A CYLINDRICAL PIPE IN AN UPRIGHT MOLD. CONCRETE IS MOVED FROM A HOPPER BY A CONVEYOR INTO A FEEDING DEVICE POSITIONED ADJACENT THE TOP OF THE MOLD. A ROTATABLE PACKER HEAD IS CARRIED UPWARDLY WITH A VERTICALLY MOVABLE CARRIAGE TO PACK THE CONCRETE AGAINST THE CYLINDRICAL MOLD TO FORM A CYLINDRICAL PIPE. THE FEEDING DEVICE HAS A CONESHAPED FUNNEL MOUNTED IN THE TOP TABLE FOR DIRECTING THE CONCRETE INTO THE TOP OF THE MOLD. A RING CARRYING A PAIR OF SCRAPER BLADES MOVES AROUND THE CONE-SHAPED FUNNEL ON OPERATION OF A FLUID MOTOR TO PUSH THE CONCRETE INTO THE MOLD.
Inventors
- 👤 Navarro T Fosse
- 👤 Harvey N Peninger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:03
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/02; B28B21/10; B28B21/22; B28B21/24; B28B21/26; B28B21/04
Claims Analysis
Total Claims: 0
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |