Padding machines
US4664791A · kind A · utility
37Cited by
14References
14Claims
0Family size
Inventors
Key dates
| Filing date | Feb 7, 1986 |
| Grant date | May 12, 1987 |
| Priority date | — |
| Expiry date | Feb 7, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB07B1/005
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A padding machine is provided for angularly variable attachment to a mobile ground carrier having a hopper into which soil is placed, a vibratory feeder and screen receiving soil from the hopper, a chute receiving screened soil from the vibratory screen and feeder to deliver the same as padding on a pipeline within a ditch and a power source driving the vibratory feeder and screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.