US3208637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for handling molten metal
Assignee: Individual
•
Filing: 1961-12-20
•
Granted: 1965-09-28
•
Expires: 1981-12-20
Abstract
No abstract record available.
Inventors
- 👤 John K Heick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:31
CPC Classifications
B; B22; B22D; B22D17/00; B22D17/20; B22D17/30; B22D39/00; B22D39/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A METHOD OF MEASURING AND FEEDING MOLTEN METAL TO A MOLD CAVITY IN A CASTING OPERATION FORM A SUPPLY RECEIVER TO AN INTERMEDIATE MEASURING CHAMBER, COMPRISING THE STEPS OF MOVING METAL FROM BELOW THE MOLTEN SURFACE THEREOF AT AN AREA OF RELATIVELY HIGH AIR PRESSURE TO AN AREA OF LESSER AIR PRESSURE ADJACENT THE INTERMEDIATE MEASURING CHAMBER BY MEANS OF THE PRESSURE DIFFERENTIAL FORMED, SIMULTANEOUSLY ADMITTING AIR TO THE AREA OF LESSER AIR PRESSURE IN AN AMOUNT INSUFFICIENT TO STOP SUCH METAL MOVEMENT, CONTROLLING THE DURATION OF SUCH PRESSURE DIFFERENTIAL TO LIMIT THE METAL SO MOVED TO A SUBSTANTIALLY PREDETERMINED AMOUNT, AND THEREAFTER DISCHARGING THE METAL AT SAID INTERMEDIATE RECEIVING CHAMBER TO THE MOLD CAVITY, WHEREBY EFFECTIVE AND ACCURATE CONTROL OF THE AMOUNT OF MOLTEN METAL TO THE MOLD CAVITY IS OBTAINED.
Claim 2
Independent Claim
132 words
A METHOD OF MEASURING AND FEEDING MOLTEN METAL TO A MOLD CAVITY IN A CASTING OPERATION FORM A SUPPLY RECEIVER TO AN INTERMEDIATE MEASURING CHAMBER, COMPRISING THE STEPS OF MOVING METAL FROM BELOW THE MOLTEN SURFACE THEREOF AT AN AREA OF RELATIVELY HIGH AIR PRESSURE TO AN AREA OF LESSER AIR PRESSURE ADJACENT THE INTERMEDIATE MEASURING CHAMBER BY MEANS OF THE PRESSURE DIFFERENTIAL FORMED, SIMULTANEOUSLY ADMITTING AIR TO THE AREA OF LESSER AIR PRESSURE IN AN AMOUNT INSUFFICIENT TO STOP SUCH METAL MOVEMENT, CONTROLLING THE DURATION OF SUCH PRESSURE DIFFERENTIAL TO LIMIT THE METAL SO MOVED TO A SUBSTANTIALLY PREDETERMINED AMOUNT, AND THEREAFTER DISCHARGING THE METAL AT SAID INTERMEDIATE RECEIVING CHAMBER TO THE MOLD CAVITY, WHEREBY EFFECTIVE AND ACCURATE CONTROL OF THE AMOUNT OF MOLTEN METAL TO THE MOLD CAVITY IS OBTAINED.
References Cited (Backward Citations)
US2511637A
Cited
US2877611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |