Title:
IMPACT PISTON DEVICE FOR IMPACT DRILL DRIVE
Document Type and Number:
Japanese Patent JP2023165623
Kind Code:
A
Abstract:
To provide an impact piston device.SOLUTION: An impact piston device for an impact drill drive is an impact piston movably implemented in a piston housing so as to reversible between a front hitting position and a back retracting position and having a front pressuring surface and a back pressuring surface, and it comprises an impact piston having a front pressure chamber and a back pressure chamber integrated with the piston housing, a hydraulic fluid feed, a hydraulic fluid drain, a first control device for coupling the back pressure chamber for an impact piston reverse movement with the hydraulic fluid feed and hydraulic fluid drain alternately and a second control device capable of adjusting stroke path of the impact piston in the piston housing. The first control device has a first control valve which can be actuated and the second control device has a second control valve which can be actuated and the first control valve and the second control valve are arranged in a valve housing in common.SELECTED DRAWING: Figure 1
Inventors:
MARKUS MERZHAEUSER
Application Number:
JP2023065311A
Publication Date:
November 16, 2023
Filing Date:
April 13, 2023
Export Citation:
Assignee:
EIRPDROLL GMBH
International Classes:
E21B6/00
Attorney, Agent or Firm:
Patent Attorney Corporation YKI International Patent Office