Patent US3301443A successfully refreshed from Google Patents.
US3301443A
Expired / Lapsed
US
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Feeding mechanism and valve used therein
Assignee: United States Steel Corp
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Filing: 1965-02-01
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Granted: 1967-01-31
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Expires: 1985-02-01
Abstract
No abstract record available.
Inventors
- 👤 John V Clancy
- 👤 John F Kearns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:09
CPC Classifications
F; F16; F16K; F16K7/00; F16K15/00; F16K15/14; F16K15/144; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A FEEDING MECHANISM FOR A VISCOUS MATERIAL COMPRISING A VERTICALLY EXTENDING CYLINDRICAL CONTAINER HAVING AN OPEN TOP AND A CONDUIT LEADING FROM THE LOWER END THEREOF, A PLUNGER MOUNTED FOR VERTICAL RECIPROCATING MOVEMENT WITH IN SAID CONTAINER BETWEEN A FIRST POSITION ADJACENT THE OPEN TOP THEREOF AND A SECOND POSITION ADJACENT THE LOWER END THEREOF, SAID CONTAINER HAVING A LATERAL OPENING THEREIN ADJACENT SAID OPEN TOP DISPOSED BELOW SAID PLUNGER WHEN THE LATTER IS DISPOSED IN SAID FIRST POSITION, A SUPPLY HOPPER HAVING A LOWER END COMMUNICATING WITH SAID OPENING, AND FEED VALVE MEANS DISPOSED IN SAID CONDUIT OPERABLE TO OPEN AND PERMIT FLOW OF VISCOUS MATERIAL OUTWARDLY OF SAID CONTAINER AND THROUGH SAID CONDUIT IN RESPONSE TO THE DOWNWARD FORCED MOVEMENT OF SAID PLUNGER AND TO CLOSE AND PREVENT FLOW OF VISCOUS MA-
Claim 2
Dependent Claim
134 words
A FEEDING MECHANISM FOR A VISCOUS MATERIAL COMPRISING A VERTICALLY EXTENDING CYLINDRICAL CONTAINER HAVING AN OPEN TOP AND A CONDUIT LEADING FROM THE LOWER END THEREOF, A PLUNGER MOUNTED FOR VERTICAL RECIPROCATING MOVEMENT WITH IN SAID CONTAINER BETWEEN A FIRST POSITION ADJACENT THE OPEN TOP THEREOF AND A SECOND POSITION ADJACENT THE LOWER END THEREOF, SAID CONTAINER HAVING A LATERAL OPENING THEREIN ADJACENT SAID OPEN TOP DISPOSED BELOW SAID PLUNGER WHEN THE LATTER IS DISPOSED IN SAID FIRST POSITION, A SUPPLY HOPPER HAVING A LOWER END COMMUNICATING WITH SAID OPENING, AND FEED VALVE MEANS DISPOSED IN SAID CONDUIT OPERABLE TO OPEN AND PERMIT FLOW OF VISCOUS MATERIAL OUTWARDLY OF SAID CONTAINER AND THROUGH SAID CONDUIT IN RESPONSE TO THE DOWNWARD FORCED MOVEMENT OF SAID PLUNGER AND TO CLOSE AND PREVENT FLOW OF VISCOUS MA-
References Cited (Backward Citations)
US2620949A
Cited
US2792856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |