Mandrel for fabricating an air spring
US4057454A · kind A · utility
4Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1976 |
| Grant date | Nov 8, 1977 |
| Priority date | — |
| Expiry date | Aug 24, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T279/1095
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Two embodiments of a mandrel for fabricating an air spring are disclosed. Each has a fixed diameter cylindrical portion and a portion variable in diameter to provide an extension of the cylindrical surface expandable to conic form. An array of fingers are pivotally secured to swing in radial planes to provide the variable diameter portions and are actuated by inflatable sleeves. The fingers are notched to provide a locating groove for the wire ring at the end of the air spring. Ply endings are folded about the wire ring by a second inflatable sleeve or bladder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.