Automatic vibration method and device for hydraulic drilling machine
US5287699A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1992 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | Jul 10, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/221
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a hydraulic drilling machine with a boom, arm and bucket as working parts, one or more of the working parts can be vibrated automatically to perform effective drilling with reduced resistance in various types of operations when the soil changes. Adequate vibration can be automatically generated by setting the working mode (Bo, A, Bu, Sk) and vibration mode (L, M, S) according to the soil or operation form beforehand and by setting the automatic vibration mode. Furthermore, since the control input of the working part lever can be added to the automatic vibration, simple and minute repeated operations, such as pressure-shifting, sifting or drilling conducted while the bucket is vibrated, can be performed readily and uniformly without exhausting the operator, and workability can thus be greatly improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.