A vibrator for, and a method for, compacting concrete and the like material in which the vibrator has a housing and an eccentric mass therein, a
A vibrator apparatus for inducing longitudinal vibrations in a well tubing or casing member for various operations, or for removing stuck tubing or casing
3. A vibrator supporting mechanism according to two opposite ends, with one end thereof connectedthe rotary angular velocity applied to an object
vibrator mechanism having a rotary shaft drivenby 2 shaft and having a weight attached thereto enrs sattached to the bearings3: anedm
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A borer comprises a hammer, a spindle connected to rotate with a rotatable table, and a vibrator connected between the hammer and a support for
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(ii) negligible tube waves and (iii) stable seismic wavelets suited to inPhysical model for the downhole orbital vibrator (DOV) - II. Rotary
A rotary air roller vibrator is depicted in which a housing has a cylindrical bore closed by two inner end plates which form a chamber. An axial
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2009620-The downhole end (2) of the drillpipe (1) contains a vibrator (3) and is held by a flexible joint (5) which permits deflection at an angle t
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The air-driven vibrator (10) includes a disc-shaped vibratory element (40) movably received in a disc-shaped working chamber (38). Upon injecting air
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The hammer (2) comprises: a jacket (3), in turn comprising: an inner chamber (32), an inlet circuit (4) for the entry of compressed air, and
