US3093271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material-handling device
Assignee: H L STOKER CO
•
Filing: 1959-04-10
•
Granted: 1963-06-11
•
Expires: 1979-04-10
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:02
CPC Classifications
B; B65; B65G; B65G65/00; B65G65/30; B65G65/34; B65G65/40; B65G65/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
APPARATUS FOR PACKING MATERIALS COMPRISING A HOPPER FOR RECEIVING AND CONTAINING THE MATERIAL TO BE PACKED, A U-TROUGH ATTACHED TO THE LOWER END OF THE HOPPER AND HAVING AN OPENING AT ONE END THEREOF, A SCREW CONVEYOR DISPOSED IN THE U-TROUGH AND EXTENDING OUT OF SAID OPENING, AN ANTI-FLOOD SLEEVE DISPOSED IN THE U-TROUGH SO AS TO ENCLOSE A PORTION OF THE LENGTH OF THE SCREW CONVEYOR THEREWITHIN ADJACENT SAID OPENING, THE SLEEVE HAVING A LENGTH SELECTED SO THAT THE LENGTH OF THE SCREW CONVEYOR ENCLOSED THEREBY IS SUCH, WITH RESPECT TO THE FLOW CHARACTERISTICS OF THE MATERIAL TO BE PACKED, AS TO INCREASE THE FRICTIONAL RESISTANCE OF THE MATERIAL TO FLOW ALONG THE SCREW CONVEYOR TO A RESISTANCE WHICH PREVENTS FLOODING OF THE SCREW CONVEYOR BY THE MATERIAL DURING PACKING, AND MEANS FOR RELEASABLY ATTACHING THE ANTI-FLOOD SLEEVE TO THE U-TROUGH.
Claim 2
Dependent Claim
142 words
APPARATUS FOR PACKING MATERIALS COMPRISING A HOPPER FOR RECEIVING AND CONTAINING THE MATERIAL TO BE PACKED, A U-TROUGH ATTACHED TO THE LOWER END OF THE HOPPER AND HAVING AN OPENING AT ONE END THEREOF, A SCREW CONVEYOR DISPOSED IN THE U-TROUGH AND EXTENDING OUT OF SAID OPENING, AN ANTI-FLOOD SLEEVE DISPOSED IN THE U-TROUGH SO AS TO ENCLOSE A PORTION OF THE LENGTH OF THE SCREW CONVEYOR THEREWITHIN ADJACENT SAID OPENING, THE SLEEVE HAVING A LENGTH SELECTED SO THAT THE LENGTH OF THE SCREW CONVEYOR ENCLOSED THEREBY IS SUCH, WITH RESPECT TO THE FLOW CHARACTERISTICS OF THE MATERIAL TO BE PACKED, AS TO INCREASE THE FRICTIONAL RESISTANCE OF THE MATERIAL TO FLOW ALONG THE SCREW CONVEYOR TO A RESISTANCE WHICH PREVENTS FLOODING OF THE SCREW CONVEYOR BY THE MATERIAL DURING PACKING, AND MEANS FOR RELEASABLY ATTACHING THE ANTI-FLOOD SLEEVE TO THE U-TROUGH.
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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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |