Device in a rock drilling machine and rock drilling machine
US9937611B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2013 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | Mar 10, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K27/041
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A device in a hydraulic rock drilling machine (1) has a distribution valve (7, 7′, 7″) for controlling hydraulic flow to different parts of the rock drilling machine. The distribution valve has a valve body (8, 8′, 8″) which moves to and from in an axial direction inside a valve chamber (33). The valve chamber is limited in axial direction by two valve end walls (10, 11; 10′, 11′; 10″, 11″). One of the valve end walls is movable in an axial direction against an abutment (12, 12″) to define an end position for the valve body, and a pressing device (13, 13′, 13″) is provided for pressing at least one of the valve end walls against the abutment. A rock drilling machine includes the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.