Patent US3307748A successfully refreshed from Google Patents.
US3307748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for feeding flowable solid materials to a delivery device
Assignee: Dart Industries Inc
•
Filing: 1966-01-21
•
Granted: 1967-03-07
•
Expires: 1986-01-21
Abstract
No abstract record available.
Inventors
- 👤 Jr George Harvey Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:20
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/54; B65D88/64; B65D88/68; B29; B29C; B29C48/00; B29C48/25; B29C48/285; B29C48/286; B29C48/288; B29C48/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A MACHINE FOR FEEDING FLOWABLE SOLIDS MATERIALS TO A DELIVERY DEVICE INCLUDING A GENERALLY CONE-SHAPED CONTAINER TERMINATING AT ITS LOWER PORTION IN AN APEX HAVING A DISCHARGE PORT THEREIN, A POWER DRIVEN ROTATABLE SPINDLE DISPOSED VERTICALLY AND CENTRALLY WITHIN SAID CONTAINER AND EXTENDING THERETHROUGH, SPIRAL SHAPED MATERIAL STIRRING MEANS FIXED TO SAID SPINDLE TO ROTATE THEREWITH INWARDLY OF SAID CONTAINER, AND BLADE MEANS FASTENED TO SAID SPIRAL SHAPED MEANS AND EXTENDING RADIALLY OUTWARDLY THEREOF IN PROXIMITY TO SAID CONTAINER AND POSITIONED AT PITCH ANGLES COUNTER TO THE PITCH ANGLE OF SAID SPIRAL SHAPED MEANS, WHEREBY ROTATION OF SAID SPINDLE CAUSES SAID BLADE MEANS TO REMOVE MATERIALS AGGLOMERATING ON SAID CONTAINER WALL AND MAINTAIN A PREDETERMINED CLEARANCE BETWEEN THE LATTER AND SAID SPIRAL SHAPED MEANS, AND WHEREBY MATERIALS REMOVED FROM SAID CONTAINER WALL BY SAID BLADE MEANS ARE CONVEYED THROUGH SAID CONTAINER IN A DIRECTION OPPOSITE TO THE DIRECTION OF FEED OF SAID SPIRAL SHAPED MEANS.
Claim 2
Dependent Claim
155 words
A MACHINE FOR FEEDING FLOWABLE SOLIDS MATERIALS TO A DELIVERY DEVICE INCLUDING A GENERALLY CONE-SHAPED CONTAINER TERMINATING AT ITS LOWER PORTION IN AN APEX HAVING A DISCHARGE PORT THEREIN, A POWER DRIVEN ROTATABLE SPINDLE DISPOSED VERTICALLY AND CENTRALLY WITHIN SAID CONTAINER AND EXTENDING THERETHROUGH, SPIRAL SHAPED MATERIAL STIRRING MEANS FIXED TO SAID SPINDLE TO ROTATE THEREWITH INWARDLY OF SAID CONTAINER, AND BLADE MEANS FASTENED TO SAID SPIRAL SHAPED MEANS AND EXTENDING RADIALLY OUTWARDLY THEREOF IN PROXIMITY TO SAID CONTAINER AND POSITIONED AT PITCH ANGLES COUNTER TO THE PITCH ANGLE OF SAID SPIRAL SHAPED MEANS, WHEREBY ROTATION OF SAID SPINDLE CAUSES SAID BLADE MEANS TO REMOVE MATERIALS AGGLOMERATING ON SAID CONTAINER WALL AND MAINTAIN A PREDETERMINED CLEARANCE BETWEEN THE LATTER AND SAID SPIRAL SHAPED MEANS, AND WHEREBY MATERIALS REMOVED FROM SAID CONTAINER WALL BY SAID BLADE MEANS ARE CONVEYED THROUGH SAID CONTAINER IN A DIRECTION OPPOSITE TO THE DIRECTION OF FEED OF SAID SPIRAL SHAPED MEANS.
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 |