US3324937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Progressively collapsible mold to accommodate shrinkage in casting
Assignee: Individual
•
Filing: 1966-06-30
•
Granted: 1967-06-13
•
Expires: 1986-06-30
Abstract
No abstract record available.
Inventors
- 👤 Ruth G Vosburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:55
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A COLLAPSIBLE PERMANENT MOLD COMPRISING MOLD PARTS HAVING INNER AND OUTER FRAME PORTIONS DEFINING A MOLD CAVITY INTO WHICH MATERIAL TO BE CAST IS POURED, SAID INNER FRAME PORTION COMPRISING SEGMENTS MOUNTED FOR INDEPENDENT MOVEMENT INTO AND OUT OF PREDETERMINED CASTING POSITION TOWARD AND AWAY FROM SAID OUTER FRAME PORTION, WEDGE MEANS ENGAGING SAID INNER FRAME SEGMENTS IN SAID CASTING POSITION, AND MEANS FOR PROGRESSIVELY COLLAPSING SAID INNER FRAME PORTION RELATIVE TO SAID OUTER FRAME PORTION, SAID COLLAPSING MEANS INCLUDING MEANS FOR ADVANCING AND RETRACTING SAID WEDGE MEANS TOWARD AND AWAY FROM SAID OUTER FRAME PORTION TO SELECTIVELY HOLD SAID SEGMENTS IN CASTING POSITION AND RELEASE THE SAME TO PROGRESSIVELY COLLAPSE INWARDLY FROM SAID OUTER FRAME PORTION.
Claim 2
Dependent Claim
117 words
A COLLAPSIBLE PERMANENT MOLD COMPRISING MOLD PARTS HAVING INNER AND OUTER FRAME PORTIONS DEFINING A MOLD CAVITY INTO WHICH MATERIAL TO BE CAST IS POURED, SAID INNER FRAME PORTION COMPRISING SEGMENTS MOUNTED FOR INDEPENDENT MOVEMENT INTO AND OUT OF PREDETERMINED CASTING POSITION TOWARD AND AWAY FROM SAID OUTER FRAME PORTION, WEDGE MEANS ENGAGING SAID INNER FRAME SEGMENTS IN SAID CASTING POSITION, AND MEANS FOR PROGRESSIVELY COLLAPSING SAID INNER FRAME PORTION RELATIVE TO SAID OUTER FRAME PORTION, SAID COLLAPSING MEANS INCLUDING MEANS FOR ADVANCING AND RETRACTING SAID WEDGE MEANS TOWARD AND AWAY FROM SAID OUTER FRAME PORTION TO SELECTIVELY HOLD SAID SEGMENTS IN CASTING POSITION AND RELEASE THE SAME TO PROGRESSIVELY COLLAPSE INWARDLY FROM SAID OUTER FRAME PORTION.
References Cited (Backward Citations)
US2733495A
Cited
US1024646A
Cited
US1137932A
Cited
US1931769A
Cited
US2116630A
Cited
US2557631A
Cited
US2799911A
Cited
US3021579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |