Title: Device for emitting acoustic waves in a liquid medium

Abstract: This device comprises two movable elements of rigid material tightly interconnected by means of a deformable membrane forming therewith a tight internal enclosure, means for varying abruptly the volume of said enclosure by successively moving the two elements away from each other, maintaining them in spaced relationship and allowing them to be urged toward each other by the effect of the external hydrostatic pressure, in which the means for moving the two elements away from each other includes two cylinders and at least one piston slidable in one of said cylinders, associated to one of said movable elements and also to a push-member slidable in one of the cylinders and bearing on the other movable element and means for feeding said cylinder with pressurized fluid so as to maintain the elements in spaced relationship or to release them.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Cholet, Jacques (Rueil-Malmaison, FR)
Laurent, Jean (Saint Germain-en-Laye, FR)
Magneville, Pierre (Vernouillet, FR)
Duconge, Claude (Le Vesinet, FR)

Application Number: 904324
Filing Date: 1978-05-09
Publication_date: 1980-05-20
Assignee: Institute Francais du Petrole (Rueil-Malmaison, FR)
Primary Class(es): 181/120 92/85B, 92/129, 251/63, 251/63.4
Other Classes:
US Patent Ref:

1874135	Aug, 1932	Spoor	251/63.
2755774	Jul, 1956	Floyd	91/394.
3002354	Oct, 1961	Dorkins	92/129.
3379273	Apr, 1968	Chelminski	340/7.
3532182	Oct, 1970	Bouyoulos	181/119.
3557550	Jan, 1971	Legarra	91/394.
3564492	Feb, 1971	Magneville	340/12.
3792425	Feb, 1974	Magneville	340/12.

Other Refs:
Primary Examiner: Hershkovitz, Abraham
Assistant Examiner:
Attorney: Craig and Antonelli