Patent US3268962A successfully refreshed from Google Patents.
US3268962A
Expired / Lapsed
US
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Method of casting
Assignee: Eaton Corp
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Filing: 1964-03-05
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Granted: 1966-08-30
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Expires: 1984-03-05
Abstract
No abstract record available.
Inventors
- 👤 Claude L Roles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:09
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/70; B22; B22D; B22D17/00; B22D17/20; B22D17/26; B22D17/32; F; F15; F15B; F15B11/00; F15B11/06; F15B11/072; F15B2211/00; F15B2211/20; F15B2211/21; F15B2211/212; F15B2211/216; F15B2211/30; F15B2211/305; F15B2211/30525; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/415; F15B2211/41509; F15B2211/41518; F15B2211/42; F15B2211/426; F15B2211/455; F15B2211/46; F15B2211/50; F15B2211/505; F15B2211/50554; F15B2211/60; F15B2211/625; F15B2211/665; F15B2211/6653; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/80; F15B2211/885; F15B2211/8855
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A METHOD FOR CASTING METAL CAPABLE OF EXPANDING WHILE IT IS BEING COOLED FROM A MOLTEN CONDITION TO A SOLID CONDITION IN A MULTIPART PERMANENT MOLD, WHICH COMPRISES THE STEPS OF: CLOSING THE MOLD AND APPLYING A CLAMPING PRESSURE THERETO SUFFICIENT TO HOLD THE MOLD CLOSED DURING THE HEREINAFTER MENTIONED CASTING STEP: CASTING MOLTEN METAL INTO THE MOLD; ALLOWING THE MOLD AND CASTING TO COOL UNTIL EXPANSION OF THE CASTING BEGINS; THEN REDUCING THE CLAMPING PRESSURE WHILE THE CASTING IS UNDERGOING EXPANSION AS IT IS COOLED AND MAINTAINING A REDUCED HOLDING PRESSURE ON THE MOLD PARTS URGING THE MOLD PARTS TO A CLOSED POSITION, WHICH HOLDING PRESSURE IS SUFFICIENT TO PERMIT THE MOLD PARTS TO MOVE APART IN RESPONSE TO EXPANSION OF THE CASTING BUT WHICH MAINTAINS THE MOLD PARTS IN SUPPORTING ENGAGEMENT WITH THE CASTING; ALLOWING THE CASTING TO COOL TO AN EJECTION TEMPERATURE AND OPENING THE MOLD AND EJECTING THE CASTING.
Claim 2
Independent Claim
153 words
A METHOD FOR CASTING METAL CAPABLE OF EXPANDING WHILE IT IS BEING COOLED FROM A MOLTEN CONDITION TO A SOLID CONDITION IN A MULTIPART PERMANENT MOLD, WHICH COMPRISES THE STEPS OF: CLOSING THE MOLD AND APPLYING A CLAMPING PRESSURE THERETO SUFFICIENT TO HOLD THE MOLD CLOSED DURING THE HEREINAFTER MENTIONED CASTING STEP: CASTING MOLTEN METAL INTO THE MOLD; ALLOWING THE MOLD AND CASTING TO COOL UNTIL EXPANSION OF THE CASTING BEGINS; THEN REDUCING THE CLAMPING PRESSURE WHILE THE CASTING IS UNDERGOING EXPANSION AS IT IS COOLED AND MAINTAINING A REDUCED HOLDING PRESSURE ON THE MOLD PARTS URGING THE MOLD PARTS TO A CLOSED POSITION, WHICH HOLDING PRESSURE IS SUFFICIENT TO PERMIT THE MOLD PARTS TO MOVE APART IN RESPONSE TO EXPANSION OF THE CASTING BUT WHICH MAINTAINS THE MOLD PARTS IN SUPPORTING ENGAGEMENT WITH THE CASTING; ALLOWING THE CASTING TO COOL TO AN EJECTION TEMPERATURE AND OPENING THE MOLD AND EJECTING THE CASTING.
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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |