Pavement extractor
US4659250A · kind A · utility
Inventor
Key dates
| Filing date | Jul 23, 1985 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Jul 23, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C23/121
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved pavement extractor is disclosed herein which comprises a completely self-contained unit for removal of pavement in a situation where a new pavement is to be created. The device includes a combination of rippers and a hold-down pressure plate which efficiently extracts the pavement from the sub-base, a control chamber where the extracted pavement is led from the rippers and the hold-down pressure plate, which control chamber has located therein a pair of opposed rollers which controllably hold the pavement while a beater mechanism beats off pieces of the pavement of predetermined adjustable size. From the beater mechanism, the extracted pavement is conveyed to an elevator mechanism included in the device which conveys the now beaten small size pieces of pavement up to a sufficiently high level so as to enable the loading thereof into a vehicle such as a dump truck. The inventive pavement extractor is designed to be pulled by a crawler-type tractor which may have mounted thereon an automatic guiding device which also forms a part of the present invention. Through the use of the present invention, pavement as thick as 7 to 8 inches or more may be extracted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.