Patent US3349157A successfully refreshed from Google Patents.
US3349157A
Expired / Lapsed
US
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Method of molding multi-laminate airfoil structures and the like
Assignee: Parsons Corp
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Filing: 1965-03-11
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Granted: 1967-10-24
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Expires: 1985-03-11
Abstract
No abstract record available.
Inventors
- 👤 John T Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:54
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/001; B29D99/0014; B29D99/0017; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/083; B29C70/28; B29C70/30; B29C70/34; B29D99/0025; B29D99/0028; B32; B32B; B32B27/00; B64; B64C; B64C3/00; B64C3/18; B64C3/24; B29K; B29K2309/00; B29K2309/08; Y; Y02; Y02T; Y02T50/00; Y02T50/40; Y10; Y10S; Y10S273/00; Y10S273/07; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T156/1044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
THE METHOD OF MOLDING AIRFOIL STRUCTURES AND THE LIKE, COMPRISING THE STEPS OF LAYING UP UPON AND AROUND THE SURFACE OF A SPANWISEGROOVED CORE A PLURALITY OF LAMINAE OF PERMEABLE FLEXIBLE MATERIAL CHARACTERIZED BY STRENGTH IN TENSION AND PRE-IMPREGNATED WITH PLASTIC AND TOGETHER CHARACTERIZED BY BEING THINNED UPON MOLDING, PRESSURE-MOLDING THE LAID UP LAMINAE ABOUT THE CORE, WHEREBY THE LAID-UP LAMINAE SHRINK INWARDLY TOWARD THE CORE AS THEY BECOME THINNED, AND SIMULTANEOUSLY PRESSING SUFFICIENT PORTIONS OF THE WRAPPED LAMINAE INWARD INTO EACH GROOVE OF THE CORE TO TAKE UP THAT EXCESS PERIPHERAL LENGTH OF THE LAMINAE WHICH RESULTS FROM SUCH THINNING, THEREBY HOLDING ALL THE FLEXIBLE MATERIAL UNWRINKLED DESPITE SUCH INWARD SHRINKAGE, WHEREBY TO FORM UPON SUCH CORE A SPANWISE-GROOVED MOLDED STRUCTURE.
Claim 2
Independent Claim
122 words
THE METHOD OF MOLDING AIRFOIL STRUCTURES AND THE LIKE, COMPRISING THE STEPS OF LAYING UP UPON AND AROUND THE SURFACE OF A SPANWISEGROOVED CORE A PLURALITY OF LAMINAE OF PERMEABLE FLEXIBLE MATERIAL CHARACTERIZED BY STRENGTH IN TENSION AND PRE-IMPREGNATED WITH PLASTIC AND TOGETHER CHARACTERIZED BY BEING THINNED UPON MOLDING, PRESSURE-MOLDING THE LAID UP LAMINAE ABOUT THE CORE, WHEREBY THE LAID-UP LAMINAE SHRINK INWARDLY TOWARD THE CORE AS THEY BECOME THINNED, AND SIMULTANEOUSLY PRESSING SUFFICIENT PORTIONS OF THE WRAPPED LAMINAE INWARD INTO EACH GROOVE OF THE CORE TO TAKE UP THAT EXCESS PERIPHERAL LENGTH OF THE LAMINAE WHICH RESULTS FROM SUCH THINNING, THEREBY HOLDING ALL THE FLEXIBLE MATERIAL UNWRINKLED DESPITE SUCH INWARD SHRINKAGE, WHEREBY TO FORM UPON SUCH CORE A SPANWISE-GROOVED MOLDED STRUCTURE.
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |