Institut Francais Du Pe'trole

Centre National De La Recherche Scientifique

Agence Nationale De Valorisation De La Recherche Etablissement Public De

Jean Clot

Jean Falipou

Emile Levallois

Rene Szabo

Daniel Esteve

Pierre Rabischong

Ai Bui

Hubert Fay

Jean-Pierre Richard

Andre Loubieres

Jean Lagasse

Method for measuring the rate of penetration of an equipment progressing

A flexible bellows connecting device which positions an output member has a pair of jacks (1,2) equipped with deformation sensors (12,13). A pair of variable capacity bellows pump reservoirs (3,4) permit predetermined motion of the jacks. An electric motor (19) drives the pump. The sensor signals provide deformation difference signal feedback to the electronic control system which may include a microprocessor (5) for closed loop position control.

Electrically-driven opposed flexible bellows pump and

Link device with a plurality of freedom degrees

A device for permitting the relatively precise positioning of two geometrical axes respectively of two elements at least one of the elements being associated with means capable of assuring its displacement characterized in that it comprises in combination at least two acoustic emitters-receivers disposed in a first plane substantially perpendicular to one of said geometrical axes, said axis being defined as the first axis, and capable of emitting toward said axis, said two emitter-receivers not being located on a same line passing through said first axis and in that it comprises a third emitter-receiver situated outside of said plane.

Method and device for placing in a determined relative position two

Method for placing two submerged elements in a relative determined position, particularly in view of their mutual connection, comprising a first step of controlling the relative displacement of said elements on the basis of the measurement of electric values so as to ensure the alignment of a central point of one end of one element with the longitudinal axis of the other and a second step of progressively bringing the two elements in contact with each other by their relative displacement controlled on the basis of the measurement of their relative distance and mutual inclination angle, by means of acoustic emitters-receivers.

The invention relates to a tactile pick-up for making contact with an object and emitting signals which are representative of the deformation caused by the object. The pick-up comprises a supple layer of variable electrical conductivity as a function of its state of compression, a matrix of measuring electrodes each connected to an output lead, and a large number of conducting elements connected to an electric source fixing their potential at a determined excitation value.

Tactile pick-up

Growing community of inventors

Saint-Orens, France

Jean Clot