Boring or penetrating the earth – Automatic control
Reexamination Certificate
2004-09-24
2008-09-16
Bagnell, David J. (Department: 3672)
Boring or penetrating the earth
Automatic control
C175S040000, C173S001000, C173S002000, C173S004000
Reexamination Certificate
active
07424920
ABSTRACT:
A method and device for detecting and responding to impact loosening of thread joints at rock drilling, in which vibrations from a drill string (1) are sensed at the same time as a rock drilling machine (2) movable along a feed beam (6) exerts the drill string (1) to impacts without feeding the drill string (1) against a ground (3), the sensed vibrations are supplied to an analysis tool (4), the sensed vibrations are compared with known vibration patterns by the analysis tool, and a signal is sent to a control system (5) for controlling the rock drilling machine (2) for stopping an impact device of the rock drilling machine when the analysis tool detects that the sensed vibrations correspond to a known vibration pattern indicating that the thread joints have been loosened by impact.
REFERENCES:
patent: 3920087 (1975-11-01), Hisey et al.
patent: 4449592 (1984-05-01), Mayer
patent: 4515045 (1985-05-01), Gnatchenko et al.
patent: 4707687 (1987-11-01), Thomas et al.
patent: 4935884 (1990-06-01), Hajicek
patent: 5138875 (1992-08-01), Booer
patent: 5141061 (1992-08-01), Henneuse
patent: 5170358 (1992-12-01), Delio
patent: 5303162 (1994-04-01), Yoon
patent: 5465798 (1995-11-01), Edlund et al.
patent: 5711382 (1998-01-01), Hansen et al.
patent: 6179065 (2001-01-01), Payne et al.
patent: 6508313 (2003-01-01), Carney et al.
patent: 6510902 (2003-01-01), Prokop et al.
patent: 6567006 (2003-05-01), Lander et al.
patent: 6687567 (2004-02-01), Watanabe
patent: 2001/0000550 (2001-05-01), Newman
patent: 2002/0124652 (2002-09-01), Schultz et al.
patent: 2003/0037423 (2003-02-01), Siegel
patent: 2004/0074652 (2004-04-01), Ginell
patent: 2005/0077084 (2005-04-01), Kracik et al.
patent: 0236925 (2002-05-01), None
Bergstrand Karin
Carlsson Katarina
Lindgren Björn
Atlas Copco Rock Drills AB
Bagnell David J.
Hutchins Cathleen R
Stone Mark P.
LandOfFree
Method and device for impact loosening of thread joints does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and device for impact loosening of thread joints, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for impact loosening of thread joints will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3981276