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:
Feb. 13, 1979
Filed:
Mar. 22, 1977
Jacques Cholet, L'Etang la Ville, FR;
Pierre Magneville, Vernouillet, FR;
Institut Francais du Petrole, , FR;
Abstract
A device for transmitting acoustic waves through a liquid medium in which it is submerged comprising two movable assemblies including respectively members provided with first contact walls and delimiting with a sealing membrane a water tight enclosure, and members provided with second contact walls which are the armatures of an electro-magnet, the respective members being so arranged that when the first contact walls are in contact, the second contact walls are spaced apart and conversely, pressure actuated means for moving the first contact walls apart from each other and releasable locking means including an energizing coil for maintaining the armatures of the electro-magnet in spaced apart relationship.