Patent US3758257A successfully refreshed from Google Patents.
Patent US3387829A successfully refreshed from Google Patents.
US3387829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixer for producing self-hardening moulding sands
Assignee: Individual
•
Filing: 1965-10-06
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Granted: 1968-06-11
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Expires: 1985-10-06
Abstract
No abstract record available.
Inventors
- 👤 Nangoh Tadao
- 👤 Yamazaki Isamu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:28
CPC Classifications
B; B01; B01F; B01F33/00; B01F33/80; B01F33/82; B01F33/821; B02; B02C; B02C13/00; B02C13/10; B01F23/00; B01F23/60; B01F27/00; B01F27/05; B01F27/07; B01F27/072; B01F27/0722; B01F27/0723; B01F27/0724; B01F27/0726; B01F27/11; B01F27/19; B01F27/192; B01F27/1921; B01F27/60; B01F27/70; B01F35/00; B01F35/71; B01F35/717; B01F35/7173; B01F35/71731; B01F35/71785; B22; B22C; B22C5/00; B22C5/04; B22C5/0409; B22C5/0413; B22C5/0422; B22C5/0427; B22C5/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A MIXER FOR PRODUCING SELF-HARDENING MOULDING SANDS COMPRISING: A SUPPLY DEVICE FOR SUPPLYING MOULDING SAND MATERIALS IN PARTICLE FORM, SAID DEVICE HAVING A PLURALITY OF HOPPERS FOR SEPARATELY SUPPLYING RESPECTIVELY DIFFERENT MOULDING SAND MATERIALS IN PARTICLE FORM; A FIRST MIXER FOR FORCED MIXING OF SAID MOULDING SAND MATERIALS, SAID FIRST MIXER HAVING A PLURALITY OF AGITATOR BLADES MOUNTED AROUND A ROTATING SHAFT, MEANS TO CONTROL THE RESISTANCE TO OUTFLOW OF MIXED SAND, AND MEANS TO CONTROL THE ROTATIONAL SPEED OF THE AGITATOR BLADES; A SECOND MIXER FOR AGITATING MIXED SAND DISCHARGED FROM THE FIRST MIXER TOGETHER WITH A LIQUID BINDER, SAID SECOND MIXER HAVING AT ITS INLET END AN INLET OPENING FOR RECEIVING SAID MIXED SAND FROM THE FIRST MIXER, A NOZZLE FOR ADDING SAID BINDER TO SAID MIXED SAND, AND A PLURALITY OF AGITATOR BLADES MOUNTED AROUND A ROTATING SHAFT; AND POWER MEANS TO DRIVE THE FIRST AND SECOND MIXERS, SAID MIXED SAND DISCHARGED FROM THE FIRST MIXER BEING MIXED WITH THE BINDER IN THE SECOND MIXER TO CAUSE SELF-HARDENING REACTION.
Claim 2
Dependent Claim
172 words
A MIXER FOR PRODUCING SELF-HARDENING MOULDING SANDS COMPRISING: A SUPPLY DEVICE FOR SUPPLYING MOULDING SAND MATERIALS IN PARTICLE FORM, SAID DEVICE HAVING A PLURALITY OF HOPPERS FOR SEPARATELY SUPPLYING RESPECTIVELY DIFFERENT MOULDING SAND MATERIALS IN PARTICLE FORM; A FIRST MIXER FOR FORCED MIXING OF SAID MOULDING SAND MATERIALS, SAID FIRST MIXER HAVING A PLURALITY OF AGITATOR BLADES MOUNTED AROUND A ROTATING SHAFT, MEANS TO CONTROL THE RESISTANCE TO OUTFLOW OF MIXED SAND, AND MEANS TO CONTROL THE ROTATIONAL SPEED OF THE AGITATOR BLADES; A SECOND MIXER FOR AGITATING MIXED SAND DISCHARGED FROM THE FIRST MIXER TOGETHER WITH A LIQUID BINDER, SAID SECOND MIXER HAVING AT ITS INLET END AN INLET OPENING FOR RECEIVING SAID MIXED SAND FROM THE FIRST MIXER, A NOZZLE FOR ADDING SAID BINDER TO SAID MIXED SAND, AND A PLURALITY OF AGITATOR BLADES MOUNTED AROUND A ROTATING SHAFT; AND POWER MEANS TO DRIVE THE FIRST AND SECOND MIXERS, SAID MIXED SAND DISCHARGED FROM THE FIRST MIXER BEING MIXED WITH THE BINDER IN THE SECOND MIXER TO CAUSE SELF-HARDENING REACTION.
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) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |