Multi-wall tie apparatus and method
US5772375A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1997 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Jun 6, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23B2251/247
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A cavity wall which is usually made with a hollow concrete block as the inner wythe and brick as the outer wythe is disclosed. A special purpose insertion tool is fitted to a standard hammer tool. A center pin is provided in the insertion tool made with an indent to match the pointed end of the tie. The pin is then pressed into the SDS fitting which is the connection into the drill. The tie end is supported by a short sleeve which, when it contacts the face of the wall, retracts against a spring until the tie driving is completed. A modified embodiment of the adapter recognizes that the tie when activated by the hammer invariably rotates clockwise. Accordingly, if the spring is wound clockwise, the bottom tail end will dig into its seat. On the other hand, if it is wound counterclockwise, it rotates in a "tail skid" relationship to the seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.