Multi-accumulator arrangement for hydraulic percussion mechanism
US10876359B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2014 |
| Grant date | Dec 29, 2020 |
| Priority date | — |
| Expiry date | Jul 7, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B1/38
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to a hydraulically powered percussion mechanism (12), comprising a piston (6) to impact a percussion bit (8). The percussion mechanism also includes a first accumulator assembly (3a) for hydraulic fluid. The first accumulator assembly comprises a plurality of first accumulator elements (27). In a first aspect, the plurality of first accumulator elements are arranged in a common housing (14). In a second aspect, each of the first accumulator elements is arranged at the same proximity to the piston. In a third aspect, each of the first accumulator elements comprises an accumulator membrane (32) or piston, and wherein the primary direction of movement of the membrane or piston in contact with the hydraulic fluid is substantially parallel to a longitudinal axis of the mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.