US3283376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of investment casting of ball bearings
Assignee: Individual
•
Filing: 1962-02-23
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Granted: 1966-11-08
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Expires: 1982-02-23
Abstract
No abstract record available.
Inventors
- 👤 Hockin John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:02
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; B; B22; B22C; B22C9/00; B22C9/02; B22C9/04; B22D; B22D19/00; B22D19/08; B22D19/085; F16C33/58; F16C33/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
IN A METHOD OF CASTING HIGH TEMPERATURE WEAR AND CORROSION RESISTANT ALLOY BALL BEARINGS, THE STEPS OF: PROVIDING AN INVESTMENT MOLD HAVING A PIN POINT GATE LEADING TO A SPHERICAL CAVITY, THE GATE NARROWING IN THE DIRECTION OF THE CAVITY UNTIL THE GATE AT THE CAVITY IS SUBSTANTIALLY LESS THAN ONE THIRD OF THE DIAMETER OF THE SPHERICAL CAVITY, BUT OF SUFFICIENT DIAMETER TO PERMIT THE FLOW OF MOLTEN METAL THERETHROUGH, HEATING A HIGH TEMPERATURE WEAR AND CORROSION RESISTANT ALLOW TO A TEMPERATURE ABOVE THE MELTING POINT OF THE ALLOY, POURING THE MOLTEN WEAR AND CORROSION-RESISTANT ALLOY INTO THE INVESTMENT MOLD, WHERE THE ALLOY FLOWS THROUGH THE PIN POINT GATE INTO THE SPHERICAL CAVITY, THE TEMPERATURE OF THE MOLD AT THE TIME OF BEGINNING THE POURING BEING SUBSTANTIALLY LOWER THAN 1300 DEGREES F., THE MINIMUM TEMPERATURE REQUIRED TO BURN OUT THE PATTERN MATERIAL USE TO FORM THE MOLD, BUT NOT LOWER THAN ROOM TEMPERATURE, WHEREBY THE HIGH TEMPERATURE OF THE MOLTEN ALLOY PASSING THROUGH THE PIN POINT GATE HEATS THE GATE TO A TEMPERATURE SO MUCH HIGHER THAN THAT TO WHICH THE MOLD SURROUNDING THE CAVITY IS RAISED THAT THE MOLTEN ALLOY IN THE MOLD CAVITY SOLIDIFIES BEFORE THE MOLTEN ALLOY WITHIN THE GATE.
Claim 2
Dependent Claim
204 words
IN A METHOD OF CASTING HIGH TEMPERATURE WEAR AND CORROSION RESISTANT ALLOY BALL BEARINGS, THE STEPS OF: PROVIDING AN INVESTMENT MOLD HAVING A PIN POINT GATE LEADING TO A SPHERICAL CAVITY, THE GATE NARROWING IN THE DIRECTION OF THE CAVITY UNTIL THE GATE AT THE CAVITY IS SUBSTANTIALLY LESS THAN ONE THIRD OF THE DIAMETER OF THE SPHERICAL CAVITY, BUT OF SUFFICIENT DIAMETER TO PERMIT THE FLOW OF MOLTEN METAL THERETHROUGH, HEATING A HIGH TEMPERATURE WEAR AND CORROSION RESISTANT ALLOW TO A TEMPERATURE ABOVE THE MELTING POINT OF THE ALLOY, POURING THE MOLTEN WEAR AND CORROSION-RESISTANT ALLOY INTO THE INVESTMENT MOLD, WHERE THE ALLOY FLOWS THROUGH THE PIN POINT GATE INTO THE SPHERICAL CAVITY, THE TEMPERATURE OF THE MOLD AT THE TIME OF BEGINNING THE POURING BEING SUBSTANTIALLY LOWER THAN 1300 DEGREES F., THE MINIMUM TEMPERATURE REQUIRED TO BURN OUT THE PATTERN MATERIAL USE TO FORM THE MOLD, BUT NOT LOWER THAN ROOM TEMPERATURE, WHEREBY THE HIGH TEMPERATURE OF THE MOLTEN ALLOY PASSING THROUGH THE PIN POINT GATE HEATS THE GATE TO A TEMPERATURE SO MUCH HIGHER THAN THAT TO WHICH THE MOLD SURROUNDING THE CAVITY IS RAISED THAT THE MOLTEN ALLOY IN THE MOLD CAVITY SOLIDIFIES BEFORE THE MOLTEN ALLOY WITHIN THE GATE.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |