Dowel bar insertion method and apparatus for concrete paving machine
US5190397A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1991 |
| Grant date | Mar 2, 1993 |
| Priority date | — |
| Expiry date | Mar 18, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C23/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved method and apparatus of inserting dowel bars into a newly formed concrete road surface at locations for at least partially forming transverse joints therein includes a slip forming machine for laying a strip of newly formed concrete. A dowel bar placement pan subframe is operably connected to the frame of the machine and extends generally transversely to the direction of forward movement of the frame. The subframe has a plurality of parallel slots disposed therein along the length thereof. A trolley is provided for traveling back and forth across the subframe and has a mechanism therein for storing a plurality of dowel bars therein and permitting the stored dowel bars to roll downwardly one behind the other. A dowel bar stopping device is provided for stopping the lowermost one of the dowel bars at a predetermined position with respect to the trolley. Retainers are operably attached to the subframe and disposed in each of the slots for holding a respective dowel bar in each slot thereof prior to insertion of the dowel bars into the newly formed concrete road surface. The method of using this apparatus includes moving the frame of the machine in a forward direction and s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.