Control valve and a method for a percussion device with a working cycle involving several coupling moments
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 20, 2007
Grant Date -
Aug 3, 2006
app pub date -
Feb 23, 2004
filing date -
Feb 21, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to a control valve, a percussion device and a method of controlling a working cycle of a percussion device. A percussion device (1) for breaking rock includes an impact element (8) controlled by a control valve (2). The control valve includes a control element (5) arranged to control channels (7b) leading to a working pressure surface (9) of the impact element (8). The control element, during a working cycle of the control valve, is arranged to open and close pressure channels at several connecting moments so that during one working cycle of the valve, several impact pulses are arranged to be produced.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully