Back to results
US 4,102,429 AGranted
Apparatus for generating seismic waves
AssigneeAtlantic Richfield Company
InventorClifford D. Dransfield
Life of this patent
Estimating the term…
Abstract
A seismic wave generator assembly with self-contained guidance and shock-absorbing means is confined within an elongated, upstanding cylindrical housing which may be lowered into position at the end of a lateral arm or a cable supported from a transport vehicle.
Claims8
A seismic wave generator system comprising:
- (a) a support frame,
- (b) a dashpot including a cylindrical fluid-filled dashpot housing dependently attached to said frame having a dashpot piston therein,
- (c) an upstanding enclosed cylindrical impact housing positioned beneath and in axial alignment with said dashpot housing,
- (d) a cylindrical sleeve rigidly fixed to the top of said impact housing and extending therefrom into slidable telescoping engagement with the external surface of said dashpot housing,
- (e) a generator piston movable within said impact housing and adapted to form with the sides and bottom thereof an expansible combustion chamber,
- (f) means within said impact housing above said generator piston for biasing said generator piston toward the bottom of said impact housing,
- (g) a piston rod extending between said impact housing and said dashpot housing on which said dashpot and generator pistons are carried, and
- (h) means for initiating a gas explosion within said combustion chamber to drive said impact housing downwardly and said generator and dashpot pistons upwardly, said sleeve being thereafter guided upwardly along said external dashpot housing surface, the motion of said impact being damped by said dashpot.
5 more elements
In an apparatus for controlling the movement of a seismic wave generator of the type adapted to impart a seismic pulse to the earth and thereafter rebound upwardly, the improvement comprising:
- (a) a support frame suspended above the earth;
- (b) an upstanding, cylindrical guide member dependently attached to said support frame;
- (c) an upstanding seismic generator cylinder positioned beneath said guide member in axial alignment therewith;
- (d) a cylindrical sleeve fixed to the top of the generator cylinder and extending upwardly therefrom so as to engage the external surface of said guide member for a limited, slidable, telescoping movement therebetween, the diameter of said sleeve being substantially equal to that of said generator cylinder;
- and
- (e) dashpot means within said guide member operably interconnected with said generator cylinder and adapted to hydraulically damp the movement thereof.
3 more elements
Dependencies are inferred from the claim text.