B - Operations – Transporting – 25 – D
Patent
B - Operations, Transporting
25
D
255/43, 138/40.1
B25D 9/12 (2006.01) B25D 9/20 (2006.01) B25D 9/26 (2006.01) G01V 1/135 (2006.01)
Patent
CA 1059008
ABSTRACT An impact tool is described which is capable of developing percussive forces for rock drillings, pile driving, seismic exploration and other repetitive high force applications. The tool contains a hammer and a valve which may be hydraulically actuated so as to oscillate; repetitively executing forward and return strokes during each cycle of oscillation. The valve is actuated in the forward stroke direction by being engaged by the hammer, and in the return stroke direction by fluid pressure means so as to switch the pressure in a cavity in which both the valve and the hammer are disposed for developing forces on the hammer so as to sustain its oscillation. A fluid filled pocket is provided into which the valve enters as it moves in the forward stroke direction, after having switched the pressure in the cavity. A passage is provided on the hammer through which the fluid trapped in the pocket can flow to an outlet channel or to the cavity, depending upon the position of the hammer. A control valve in the channel determines the flow therethrough, and thus the dispiscement of the valve into the pocket, thereby providing control over the stroke of the valve and the period between switching of the pressure in the cavity. The hammer stroke length and the frequency and energy of the impacts delivered by the hammer are dependent upon the switching period, and may be varied by the use of the control valve.
255262
LandOfFree
Impact tool does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Impact tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impact tool will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-107702