Fire building drum
US4812197A · kind A · utility
4Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 12, 1988 |
| Grant date | Mar 14, 1989 |
| Priority date | — |
| Expiry date | Feb 12, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D2030/3214
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A cylindrical tire building former has two sets of radially expandable segments or located one set at each axial end of the former. The sets of segments or are expanded by engagement of each segment with an axially moveable wedge member. The wedge member may comprise an annular body, or an annular array of individual wedges. The wedge member is moved by operation of a plurality of screw struts which are arranged on a pitch circle and which are each rotated by a planet gear. The planet gears are driven simultaneously by a central sun gear to move the wedge member evenly along the screw struts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.