US3414449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible diaphragms and methods and apparatus for the manufacture thereof
Assignee: Dunlop Rubber Co Ltd
•
Filing: 1964-03-20
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Granted: 1968-12-03
•
Expires: 1984-03-20
Abstract
No abstract record available.
Inventors
- 👤 Beach Barry Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:18
CPC Classifications
B; B29; B29D; B29D22/00; B29D22/02; B29D22/023; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60; B29C53/602; B29C53/605; B29C69/00; B29C69/001; B29C69/002; F; F16; F16J; F16J3/00; F16J3/02; B29L; B29L2031/00; B29L2031/774; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1051
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A METHOD OF MANUFACTURING A RESILIENT DIAPHRAGM COMPRISING WINDING FILAMENTARY MATERIAL AROUND A ROTATING FORMER, THE FILAMENTARY MATERIAL BEING LAID ON THE FORMER SO THAT EACH TURN OF THE MATERIAL AROUND THE FORMER LIES IN A PLANE WHICH IS INCLINED RELATIVE TO THE AXIS OF ROTATION OF THE FORMER, ROTATING THE FORMER ABOUT ITS AXIS AT A PREDETERMINED SPEED THERETO SO THAT THE FILAMENTARY MATERIAL PROGESSIVELY EXTENDS OVER THE FORMER SURFACE, CONTINUING THE WINDING PROCESS TO PRODUCE A DOUBLE LAYER OF FILAMENTARY MATERIAL ON THE FORMER IN WHICH ALL REGIONS OF THE LAYER HAVE LENGTHS OF MATERIAL DISPOSED IN TWO DIRECTIONS AT OPPOSITE ANGLES RELATIVE TO THE AXIS OF THE FORMER, APPLYING UNVULCANIZED ELASTOMERIC MATERIAL TO SAID FILAMENTARY MATERIAL TO HOLD THE FILAMENTARY MATERIAL IN ITS WOUND FORM, REMOVING THE WOUND FILAMENTARY MATERIAL FROM THE FORMER AND SHAPING THE WOUND FILAMENTARY MATERIAL INTO A CUP-SHAPED FORM.
Claim 2
Independent Claim
146 words
A METHOD OF MANUFACTURING A RESILIENT DIAPHRAGM COMPRISING WINDING FILAMENTARY MATERIAL AROUND A ROTATING FORMER, THE FILAMENTARY MATERIAL BEING LAID ON THE FORMER SO THAT EACH TURN OF THE MATERIAL AROUND THE FORMER LIES IN A PLANE WHICH IS INCLINED RELATIVE TO THE AXIS OF ROTATION OF THE FORMER, ROTATING THE FORMER ABOUT ITS AXIS AT A PREDETERMINED SPEED THERETO SO THAT THE FILAMENTARY MATERIAL PROGESSIVELY EXTENDS OVER THE FORMER SURFACE, CONTINUING THE WINDING PROCESS TO PRODUCE A DOUBLE LAYER OF FILAMENTARY MATERIAL ON THE FORMER IN WHICH ALL REGIONS OF THE LAYER HAVE LENGTHS OF MATERIAL DISPOSED IN TWO DIRECTIONS AT OPPOSITE ANGLES RELATIVE TO THE AXIS OF THE FORMER, APPLYING UNVULCANIZED ELASTOMERIC MATERIAL TO SAID FILAMENTARY MATERIAL TO HOLD THE FILAMENTARY MATERIAL IN ITS WOUND FORM, REMOVING THE WOUND FILAMENTARY MATERIAL FROM THE FORMER AND SHAPING THE WOUND FILAMENTARY MATERIAL INTO A CUP-SHAPED FORM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |