US2980571A
Expired / Lapsed
US
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Method of making a diaphragm for fluid spring
Assignee: Uniroyal Inc
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Filing: 1958-08-04
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Granted: 1961-04-18
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Expires: 1978-08-04
Abstract
No abstract record available.
Inventors
- 👤 Mosshart Crockett
- 👤 Gerald O Edgerly
- 👤 Russell R Eccleston
- 👤 Alfred W Sear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:16
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/02; F16F9/04; F16F9/0409; B; B29; B29D; B29D22/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1036; Y10T156/1038; Y10T156/1051
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
127 words
IN A METHOD OF MAKING A GENERALLY TUBULAR, FLEXIBLE DIAPHRAGM HAVING A LARGER END AND A SMALLER END BE SUPERPOSING AND ADHERING TWO PLIES OF FABRIC COATED WITH A FLEXIBLE FLUID-IMPERMEABLE COMPOSITION, THE IMPROVEMENT COMPRISING THE STEPS OF FORMING A SINGLE-PLY CYLINDRICAL UNIT FROM SAID COATED FABRIC, TWISTING THE CENTRAL PORTION OF SAID CYLINDRICAL UNIT TO THEREBY CONTRACT AND FLARE THE SAME INWARDLY, DRAWING ONE END OF THE UNIT ALONG THE REMAINDER THEREOF TO A POSITION OVER THE OTHER END OF SAID UNIT THEREBY FORMING A CONTINUOUS FOLD LINE AT THE CENTER OF SAID FLARED CENTRAL PORTION AND OBTAINING A GENERALLY TUBULAR, FLEXIBLE DIAPHRAGM HAVING A LARGER END AND A SMALLER END AT SAID FOLD LINE AND HAVING TWO SUPERPOSED, SUBSTANTIALLY COEXTENSIVE PLIES OF SAID COATED FABRIC.
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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |