Patent US3288537A successfully refreshed from Google Patents.
US3288537A
Expired / Lapsed
US
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Means for handling material
Assignee: Pullman Inc
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Filing: 1965-07-26
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Granted: 1966-11-29
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Expires: 1985-07-26
Abstract
No abstract record available.
Inventors
- 👤 Robert A Hitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:39
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/04; B65G53/06; B65G53/10; B65G53/12; B65G2812/00; B65G2812/16; B65G2812/1608; B65G2812/1616; B65G2812/1625
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A MATERIAL HANDLING HOPPER CONSTRUCTION COMPRISING A CONICAL STORAGE STRUCTURE HAVING AN APEX PORTION AND A DISCHARGE PASSAGE COMMUNICATING WITH THE APEX PORTION, SAID APEX PORTION PROVIDED WITH AN UPPER FLUID CIRCULATING MEANS, SAID CIRCULATING MEANS HAVING AN ANNULAR RING MEANS DISPOSED WITHIN THE APEX PORTION AND DEFINING AN ANNULAR PERIPHERAL PASSAGE OF GRADUALLY DECREASING CROSS SECTION IN THE DIRECTION OF FLUID FLOW, AND A CENTRAL WHIRLPOOL CHAMBER, SAID ANNULAR RING MEANS BEING PROVIDED WITH A PLURALITY OF TRANS-RADIAL PASSAGES COMMUNICATING THE ANNULAR PASSAGE WITH THE INTERIOR OF THE CENTRAL WHIRLPOOL CHAMBER, A LOWER FLUID CIRCULATING MEANS INCLUDING A VENTURI MEANS DISPOSED WITHIN SAID APEX PORTION AND BELOW SAID ANNULAR RING MEANS MEMBER AND COM-
Claim 2
Dependent Claim
115 words
A MATERIAL HANDLING HOPPER CONSTRUCTION COMPRISING A CONICAL STORAGE STRUCTURE HAVING AN APEX PORTION AND A DISCHARGE PASSAGE COMMUNICATING WITH THE APEX PORTION, SAID APEX PORTION PROVIDED WITH AN UPPER FLUID CIRCULATING MEANS, SAID CIRCULATING MEANS HAVING AN ANNULAR RING MEANS DISPOSED WITHIN THE APEX PORTION AND DEFINING AN ANNULAR PERIPHERAL PASSAGE OF GRADUALLY DECREASING CROSS SECTION IN THE DIRECTION OF FLUID FLOW, AND A CENTRAL WHIRLPOOL CHAMBER, SAID ANNULAR RING MEANS BEING PROVIDED WITH A PLURALITY OF TRANS-RADIAL PASSAGES COMMUNICATING THE ANNULAR PASSAGE WITH THE INTERIOR OF THE CENTRAL WHIRLPOOL CHAMBER, A LOWER FLUID CIRCULATING MEANS INCLUDING A VENTURI MEANS DISPOSED WITHIN SAID APEX PORTION AND BELOW SAID ANNULAR RING MEANS MEMBER AND COM-
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |