Method and apparatus for inserting dowel bars for a concrete slip forming machine
US5209602A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 10, 1991 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Jun 10, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C23/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus for inserting dowel bars into a concrete slab is used in association with a slip forming machine of a type having a frame with a pan attached thereto for shaping uncured concrete into a continuous concrete slab. A plurality of openings are exposed through the pan and are spaced across the pan. Dowel bar retainers are disposed in each respective one of the openings for holding a dowel bar in readiness to be inserted into the concrete slab. A dowel bar inserter is disposed above each of the dowel bar retainers for pushing a dowel bar disposed in a respective one of the dowel bar retainers through a respective one of the openings and into the concrete slab. Apparatus is provided for automatically and independently actuating each one of the dowel bar inserters at a predetermined place in a concrete slab whereby respective ones of the dowel bars disposed in respective ones of the dowel bar inserters can be positioned in the concrete in a predetermined pattern across the concrete slab.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.