Slug riveting method and apparatus
Abstract
Abstract RIVERTING APPARATUS HAVING UPPER AND LOWER ANNULAR CLAMPS ENGAGING THE WORK PIECES AND COAXIAL UPPER AND LOWER HEAD FORMING ANVILS POSITIONED TO HOLD A CYLINDRICAL RIVET BLANK OR SLUG IN THE RIVET HOLE IN THE WORK SHEETS WITH BOTH ENDS OF THE BLANK PROTRUDING FROM THE WORK PREDETERMINED DISTANCES TO PROVIDE HEAD FORMING MATERIAL. IN FORMING THE HEADS THE UPPER ANVIL IS FIXED AND THE LOWER ANVIL IS MOVED AGAINST THE BLANK TO SQUEEZE-FORM A HEAD. INITIALLY THE FORCE OF THE UPPER CLAMP EXCEEDS THE SQUEEZE FORCE OF THE LOWER ANVIL BUT AFTER THE LOWER HEAD IS PARTIALLY FORMED THE INCREASING FORCE OF THE LOWER ANVIL OVERCOMES THE FORCE OF THE UPPER CLAMP AND CONTINUED SQUEEZEING MOVEMENT OF THE LOWER ANVIL MOVES THE WORK PIECES AND THE RIVET BLANK UPWARDLY TO SQUEEZE-FORM THE UPPER HEAD AGAINST THE STATIONARY UPPER ANVIL AND COMPLETES THE FORMATION OF THE LOWER HEAD.
Inventors
- 👤 Thomas H Speller
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |