Inserts and reusable holder therefor
US7677829B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2005 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Jan 14, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/7007
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Method and apparatus for providing inserts, such as lift inserts and step inserts, in cast members. The inserts have breakaway tabs mounted in receiving slots in either a reusable holder or disk-shaped member. The assembled insert and holder are inserted through a collar on the outer jacket of a mold assembly and a locking pin passes through cooperating openings in the holder and collar to retain the lift insert/holder in place during the casting operation. The disk-shaped member is fixed to a jacket of the mold assembly. The breakaway tabs break away from the insert when the cast member is separated from the mold assembly, the breakaway tabs being discarded and the holder (disk-shaped member) being reusable many times for subsequent casting operations. The slots, in one embodiment, have a locking shoulder to lock the tabs in their slots. In another embodiment, a cam surface on the tabs lock the tabs in the slots. In another embodiment, one slot and one tab differ in radial or circumferential length from the other tabs and slots to permit alignment between the slots and tabs in only one position to assure that the tabs are properly mounted in the holder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.