The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 17, 1978
Filed:
Jun. 15, 1976
Leon Sayous, Pau, FR;
Societe Nationale Elf Aquitaine (Production), Paris, FR;
Abstract
This invention concerns a device for emitting shock-waves, with adjustable capacity. Such a device comprises a valve, a barrel with a seat for this valve, barrel and valve being on the same axis, and forming between them an annular combustion chamber, which can be placed in communication with the outside atmosphere by axial movement of the valve, and which comprises means of admitting the oxidant-fuel mixture, the said valve forming a differential piston, one side of which forms a mobile wall of a pressurized fluid chamber, and part of the other side of which forms a mobile wall of the combustion chamber. In this device a fixed wall of the combustion chamber contains at least two regularly spaced apertures at its perimeter, into which fit removable plugs, each of which comprises a cavity opening into the combustion chamber, and which comprise means of admitting fuel and oxidant, and ignition means. The device generates compression waves for seismic exploration.