Patent US446518A successfully refreshed from Google Patents.
Patent US3237753A successfully refreshed from Google Patents.
US3237753A
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Elevator for fragile, discrete material
Assignee: ALLEN-HARPER Inc
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Filing: 1965-02-08
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Granted: 1966-03-01
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Expires: 1985-02-08
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Allen
- 👤 Chester H Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:14
CPC Classifications
B; B65; B65G; B65G21/00; B65G21/20; B65G21/2027; B65G21/2036
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
AN ELEVATOR FOR FRAGILE, DISCRETE MATERIALS COMPRISING: (A) A SUCTION BOX HAVING AN OPEN UPRIGHT SIDE AND AN OPEN TOP, (B) AN ENDLESS SCREEN HAVING A STEEPLY INCLINED FLIGHT SPANNING SAID OPEN UPRIGHT SIDE AND A SUCCEEDING SUBSTANTIALLY HORIZONTAL SECOND FLIGHT SPANNING SAID OPEN TO AND HAVING A DISCHARGE PORTION, (C) MEANS FOR SUPPORTING SAID ENDLESS SCREEN INCLUDING A SKELETAL ROLL AT THE JUNCTION OF SAID INCLINED AND HORIZONTAL FLIGHTS, (D) MEANS FOR DRIVING SAID SCREEN, (E) MEANS INCLUDING A CHUTE TERMINATING ADJACENT THE OUTER SURFACE OF SAID INCLINED FLIGHT FOR DELIVERING MATERIALS TO SAID ELEVATOR, (F) MEANS FOR CREATING NEGATIVE AIR PRESSURE ASSOCIATED WITH SAID SUCTION BOX SUFFICIENT TO HOLD MATERIALS OF THE ABOVE-MENTIONED TYPE TO THE OUTER SURFACE OF SAID INCLINED FLIGHT, (G) AND MEANS WITHIN SAID SUCTION BOX FOR VARYING THE NEGATIVE AIR PRESSURE APPLIED TO SAID SECOND SUBSTANTIALLY HORIZONTAL FLIGHT AS SAID DISCHARGE PORTION IS APPROACHED, COMPRISING A PIVOTED VANE POSITIONED BENEATH SAID SECOND FLIGHT AND ADJUSTABLY MOVABLE TO VARIOUS INCLINATIONS WITHIN SAID SUCTION BOX.
Claim 2
Dependent Claim
169 words
AN ELEVATOR FOR FRAGILE, DISCRETE MATERIALS COMPRISING: (A) A SUCTION BOX HAVING AN OPEN UPRIGHT SIDE AND AN OPEN TOP, (B) AN ENDLESS SCREEN HAVING A STEEPLY INCLINED FLIGHT SPANNING SAID OPEN UPRIGHT SIDE AND A SUCCEEDING SUBSTANTIALLY HORIZONTAL SECOND FLIGHT SPANNING SAID OPEN TO AND HAVING A DISCHARGE PORTION, (C) MEANS FOR SUPPORTING SAID ENDLESS SCREEN INCLUDING A SKELETAL ROLL AT THE JUNCTION OF SAID INCLINED AND HORIZONTAL FLIGHTS, (D) MEANS FOR DRIVING SAID SCREEN, (E) MEANS INCLUDING A CHUTE TERMINATING ADJACENT THE OUTER SURFACE OF SAID INCLINED FLIGHT FOR DELIVERING MATERIALS TO SAID ELEVATOR, (F) MEANS FOR CREATING NEGATIVE AIR PRESSURE ASSOCIATED WITH SAID SUCTION BOX SUFFICIENT TO HOLD MATERIALS OF THE ABOVE-MENTIONED TYPE TO THE OUTER SURFACE OF SAID INCLINED FLIGHT, (G) AND MEANS WITHIN SAID SUCTION BOX FOR VARYING THE NEGATIVE AIR PRESSURE APPLIED TO SAID SECOND SUBSTANTIALLY HORIZONTAL FLIGHT AS SAID DISCHARGE PORTION IS APPROACHED, COMPRISING A PIVOTED VANE POSITIONED BENEATH SAID SECOND FLIGHT AND ADJUSTABLY MOVABLE TO VARIOUS INCLINATIONS WITHIN SAID SUCTION BOX.
References Cited (Backward Citations)
US1377136A
Cited
US3086253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |