US3290733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold and core blowing machine
Assignee: Osborn Manufacturing Corp
•
Filing: 1962-02-26
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Granted: 1966-12-13
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Expires: 1982-02-26
Abstract
No abstract record available.
Inventors
- 👤 Leon F Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:01
CPC Classifications
B; B22; B22C; B22C15/00; B22C15/23; B22C15/24; B22C15/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN A MOLD AND CORE BLOWING MECHINE HAVING A SAND RESERVOIR WITH A BLOW OPENING AND A SAND CHARGING OPENING, MEANS FOR CLOSING SUCH CHARGING OPENING PRIOR TO THE BLOW, AND MEANS FOR EXHAUSTING SAID RESERVOIR FOLLOWING THE BLOW, BLOW MEANS FOR DELIVERING AIR UNDER PRESSURE TO SAID RESERVOIR INTERNALLY OF THE BODY OF SAND CONTAINED THEREIN COMPRISING AN AIR CONDUIT LEADING TO AND COMMUNICATING WITH A PAIR OF TUBES SLEEVED ONE INSIDE THE OTHER WITH A LAYER OF FINE MESH SCREEN INTERPOSED THEREBETWEEN, SAID TUBES EXTENDING WITHIN SAID RESERVOIR AND HAVING APERTURES IN THE WALLS ALIGNED WITH ONE ANOTHER.
Claim 2
Dependent Claim
100 words
IN A MOLD AND CORE BLOWING MECHINE HAVING A SAND RESERVOIR WITH A BLOW OPENING AND A SAND CHARGING OPENING, MEANS FOR CLOSING SUCH CHARGING OPENING PRIOR TO THE BLOW, AND MEANS FOR EXHAUSTING SAID RESERVOIR FOLLOWING THE BLOW, BLOW MEANS FOR DELIVERING AIR UNDER PRESSURE TO SAID RESERVOIR INTERNALLY OF THE BODY OF SAND CONTAINED THEREIN COMPRISING AN AIR CONDUIT LEADING TO AND COMMUNICATING WITH A PAIR OF TUBES SLEEVED ONE INSIDE THE OTHER WITH A LAYER OF FINE MESH SCREEN INTERPOSED THEREBETWEEN, SAID TUBES EXTENDING WITHIN SAID RESERVOIR AND HAVING APERTURES IN THE WALLS ALIGNED WITH ONE ANOTHER.
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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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |