US2755528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for the casting of shaped articles or machine parts
Assignee: Karl Schmidt GmbH
•
Filing: 1951-01-24
•
Granted: 1956-07-24
•
Expires: 1971-01-24
Abstract
No abstract record available.
Inventors
- 👤 Bucken Curt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:51
CPC Classifications
B; B22; B22D; B22D15/00; B22D15/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD OF CASTING IN PERMANENT MOLDS BODIES HAVING RECESSES WHOSE SURFACES ARE PROVIDED WITH UNDERCUTS, WHICH COMPRISES FORMING A THIN METALLIC CASE HAVING THE EXTERNAL SHAPE OF THE WALLS OF THE RECESS, AND HAVING A CLOSED END AND AN OPEN END, INSERTING INTO SAID CASE THROUGH THE OPEN END SUCCESSIVELY A PLURALITY OF SOLID CORE PARTS WHICH FILL THE PART OF THE CASE CORRESPONDING TO THE RECESS, AT LEAST ONE OF SAID PARTS WHICH IS FIRST INTRODUCED PROJECTING INTO AN UNDERCUT-FORMING PORTION OF THE CASE, INSERTING THE CASE IN A DIE IN WHICH THE CLOSED END IS SPACED FROM THE INNER WALL OF THE DIE, CASTING METAL INTO THE DIE, AND THEREAFTER REMOVING THE CORE PARTS SUCCESSIVELY UNBROKEN FROM THE CASE.
Claim 2
Independent Claim
122 words
A METHOD OF CASTING IN PERMANENT MOLDS BODIES HAVING RECESSES WHOSE SURFACES ARE PROVIDED WITH UNDERCUTS, WHICH COMPRISES FORMING A THIN METALLIC CASE HAVING THE EXTERNAL SHAPE OF THE WALLS OF THE RECESS, AND HAVING A CLOSED END AND AN OPEN END, INSERTING INTO SAID CASE THROUGH THE OPEN END SUCCESSIVELY A PLURALITY OF SOLID CORE PARTS WHICH FILL THE PART OF THE CASE CORRESPONDING TO THE RECESS, AT LEAST ONE OF SAID PARTS WHICH IS FIRST INTRODUCED PROJECTING INTO AN UNDERCUT-FORMING PORTION OF THE CASE, INSERTING THE CASE IN A DIE IN WHICH THE CLOSED END IS SPACED FROM THE INNER WALL OF THE DIE, CASTING METAL INTO THE DIE, AND THEREAFTER REMOVING THE CORE PARTS SUCCESSIVELY UNBROKEN FROM THE CASE.
References Cited (Backward Citations)
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US1281258A
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Cited
US1393195A
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Cited
US2527537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |