Post driving and earth boring machine
US6305480A · kind A · utility
Inventor
Key dates
| Filing date | Apr 6, 2000 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Apr 6, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B1/38
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A machine for driving posts, drills, large spikes, and the like work pieces into the ground, pavements, or wall structures. The machine comprises an elongated tower, a carriage, a hammer, a combination of an elongated two-way cylinder and a pulley system, at least one control valve box, a plurality of hydraulic pressurized lines, a plurality of hydraulic conduits, and a plurality of fasteners. The tower has two parallel rails for the hammer to slide upward, and then downward so as to exert a force upon the work piece toward a work surface. The machine may further include two two-way cylinders, a hammer guide, constraining springs and an interchangeable plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.