Patent US3290423A successfully refreshed from Google Patents.
US3290423A
Expired / Lapsed
US
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Manufacture of friction discs
Assignee: Federal Mogul Friction Products Ltd
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Filing: 1962-11-13
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Granted: 1966-12-06
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Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 Hatch Donald
- 👤 Mellor Peter Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:46
CPC Classifications
B; B29; B29C; B29C39/00; B29C39/02; B29C39/04; B29C39/08; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/42; F; F16; F16D; F16D69/00; F16D69/02; F16D69/025; F16D69/026; B29K; B29K2105/00; B29K2105/06; B29K2105/12; B29K2503/00; B29K2503/04; B29L; B29L2031/00; B29L2031/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A METHOD OF MANUFACTURING A BLANK FOR AN ANNULAR FRICTION DISC FROM SOLID INGREDIENTS THAT INDLUDE FIBERS AND A BINDING AGENT COMPRISING THE STEPS OF SUSPENDING THE SOLID INGREDIENTS OF THE BLAND IN A LIQUID PHASE, ROTATING AT HIGH SPEED A MOULD HAVING A CENTRAL OPENING AND AN ANNULAR CAVITY WHOSE RADICAL CROSS-SECTION DECREASES IN DEPTH FROM THE INNER EDGE PUTWARDS, FEEDING THE SUSPENSION THROUGH THE OPENING INTO THE CAVITY, WHEREBY THE SOLID INGREDIENTS SEPARATE FROM THE LIQUID PHASE UNDER CENTRIFUGAL ACTION AND FILL THE CAVITY TO FORM A BLANK DIMINISHING IN THICKNESS RADIALLY OUTWARDS WHILE THE LIQUID ESCAPES THROUGH SAID CENTRAL OPENING, SAID SUBSEQUENTLY COMPRESSING THE BLAND TO UNIFORM THICKNESS TO PRODUCE A BLANK OF UNIFORM DENSITY.
Claim 2
Independent Claim
118 words
A METHOD OF MANUFACTURING A BLANK FOR AN ANNULAR FRICTION DISC FROM SOLID INGREDIENTS THAT INDLUDE FIBERS AND A BINDING AGENT COMPRISING THE STEPS OF SUSPENDING THE SOLID INGREDIENTS OF THE BLAND IN A LIQUID PHASE, ROTATING AT HIGH SPEED A MOULD HAVING A CENTRAL OPENING AND AN ANNULAR CAVITY WHOSE RADICAL CROSS-SECTION DECREASES IN DEPTH FROM THE INNER EDGE PUTWARDS, FEEDING THE SUSPENSION THROUGH THE OPENING INTO THE CAVITY, WHEREBY THE SOLID INGREDIENTS SEPARATE FROM THE LIQUID PHASE UNDER CENTRIFUGAL ACTION AND FILL THE CAVITY TO FORM A BLANK DIMINISHING IN THICKNESS RADIALLY OUTWARDS WHILE THE LIQUID ESCAPES THROUGH SAID CENTRAL OPENING, SAID SUBSEQUENTLY COMPRESSING THE BLAND TO UNIFORM THICKNESS TO PRODUCE A BLANK OF UNIFORM DENSITY.
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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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |