| Patent Number |
Title Of Patent |
Date Issued |
| 6065562 |
System for imparting compressional and shear waves into the earth |
May 23, 2000 |
| A seismic vibrator system for imparting compressional and shear wave vibrations into the earth has an earth contacting base with a vertical post. A tubular hub is slidably received on the post in a piston/cylinder relationship. Spaced apart horizontal top and bottom plates are secured to |
| 4797862 |
Seismic generator |
January 10, 1989 |
| The method and apparatus for generating seismic vibrations in a liquid includes an electronically controlled, hydraulically powered generator that includes a piston assembly reciprocally mounted on a cylindrical post in a generator housing. The control apparatus includes a control valve |
| 4751687 |
Methods of reducing harmonic distortion in continuous wave seismic exploration |
June 14, 1988 |
| Described is a method of driving a seismic vibrator with a control signal to produce an output signal having minimized harmonic distortion. The method includes the steps of producing a plurality a harmonic distortion signals related to a fundamental frequency of the control signal. The |
| 4658930 |
Vibrator for seismic geophysical prospecting |
April 21, 1987 |
| An improved vibrator system for seismic geophysical prospecting, comprising a sealed chamber having two parts which reciprocate axially with respect to each other providing a sealed space between the two parts. One part connected to a baseplate, the other part connected to a reaction mas |
| 4635747 |
Marine seismic vibrator having support structure including vibration isolators |
January 13, 1987 |
| Mounting structure for a marine seismic vibrator comprising at least three acoustic isolators equally spaced apart about an upper housing of the vibrator. Each of the isolators comprises a pair of spaced mounting pads mechanically secured to the housing. A U-shaped bracket having a base |
| 4484656 |
Carrier vehicle for seismic vibrational system |
November 27, 1984 |
| An over-the-road type vehicle for transport and powering of a seismic hydraulic vibrator which is adapted to operate in either one of two modes of operation. A first mode is the conventional mode wherein the vehicle is operated over large distances at varying road speeds, obtained by use |
| 4341282 |
Carrier vehicle for seismic vibrational system |
July 27, 1982 |
| An over-the-road type vehicle for transport and powering of a seismic hydraulic vibrator which is adapted to operate in either one of two modes of operation. A first mode is the conventional mode wherein the vehicle is operated over large distances at varying road speeds, obtained by use |
