Patent US3136831A successfully refreshed from Google Patents.
US3136831A
Expired / Lapsed
US
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Casting method
Assignee: RTX Corp
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Filing: 1961-07-14
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Granted: 1964-06-09
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Expires: 1981-07-14
Abstract
No abstract record available.
Inventors
- 👤 Raymond D Zinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:34
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0033; C06B21/0058; B; B29; B29C; B29C33/00; B29C33/44; B29C33/52; Y; Y10; Y10S; Y10S425/00; Y10S425/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A METHOD OF MAKING A CASTING HAVING A HOLLOW PORTION THEREIN COMPRISING: (A) PLACING INA DIE A CONTINUOUS OPEN-ENDED WEBBING MEMBER CAPABLE OF BEING FILLED TO FORM A SOLID, OPENENDED BODY, SAID WEBBING MEMBER HAVING SUFFICIENT FLEXIBILITY TO CONFORM TO THE DESIRED SHAPE OF A HOLLOW PORTION OF SAID DIE, SAID DIE HAVING A PASSAGE EXTENDING THROUGH AT LEAST ONE END THEREOF TO SAID HOLLOW PORTION; (B) INSERTING A MANDREL THROUGH SAID PASSAGE INTO SAID WEBBING MATERIAL IN SAID HOLLOW PORTION WHEREBY TO ENVELOPE THE SIDES OF SAID MANDREL WITH SAID WEBBING MATERIAL; (C) INJECTING INTO THE SPACE BETWEEN SAID MANDREL AND THE ADJACENT WEBBING A FLOWABLE FILLER MATERIAL CAPABLE OF BEING TREATED TO FORM A RIGID, SOLUBLE FILLER, THE POSITION OF SAID MANDREL BEING ADJUSTED SUCH THAT AFTER SAID FILLER IS INJECTED THE ENDE OF SAID MANDREL REMAIN UNCOVERED; (D) TREATING SAID FILLER MATERIAL TO CAUSE IT TO HARDEN TO FORM A RIGID CORE;
Claim 2
Independent Claim
155 words
A METHOD OF MAKING A CASTING HAVING A HOLLOW PORTION THEREIN COMPRISING: (A) PLACING INA DIE A CONTINUOUS OPEN-ENDED WEBBING MEMBER CAPABLE OF BEING FILLED TO FORM A SOLID, OPENENDED BODY, SAID WEBBING MEMBER HAVING SUFFICIENT FLEXIBILITY TO CONFORM TO THE DESIRED SHAPE OF A HOLLOW PORTION OF SAID DIE, SAID DIE HAVING A PASSAGE EXTENDING THROUGH AT LEAST ONE END THEREOF TO SAID HOLLOW PORTION; (B) INSERTING A MANDREL THROUGH SAID PASSAGE INTO SAID WEBBING MATERIAL IN SAID HOLLOW PORTION WHEREBY TO ENVELOPE THE SIDES OF SAID MANDREL WITH SAID WEBBING MATERIAL; (C) INJECTING INTO THE SPACE BETWEEN SAID MANDREL AND THE ADJACENT WEBBING A FLOWABLE FILLER MATERIAL CAPABLE OF BEING TREATED TO FORM A RIGID, SOLUBLE FILLER, THE POSITION OF SAID MANDREL BEING ADJUSTED SUCH THAT AFTER SAID FILLER IS INJECTED THE ENDE OF SAID MANDREL REMAIN UNCOVERED; (D) TREATING SAID FILLER MATERIAL TO CAUSE IT TO HARDEN TO FORM A RIGID CORE;
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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |