Process for manufacturing a resilient mounting element
Abstract
Abstract A method for manufacturing a resilient mounting element having a vulcanized rubber sleeve interposed between two cylindrical bushings. Inner and outer cylindrical bushings are coaxially positioned within a cylindrical mold cavity. The outer bushing is made of a resilient plastic having a relatively high tensile strength and modulus of elasticity and has a diameter somewhat smaller than the diameter of the mold cavity. Rubber is injected under pressure between the bushings to cause a controlled resilient increase in the diameter of the outer bushing to force the outer bushing against the mold cavity wall. The injection pressure is maintained while the rubber is vulcanized and the pressure is then released. The outer bushing then resiliently returns toward its original diameter, thereby compensating in part for the shrinking strains in the rubber.
Inventors
- 👤 Corrado Tavella
Bibliographic Details
Claims Analysis
Total Claims: 1References Cited (Backward Citations)
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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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |