Abstract: The invention relates to a cutting wheel of a tunnel boring machine comprising at least one material discharge opening (5), said discharge opening (5) being delimited by a circumferential wall (10), the cutting wheel (3) being characterized in that it further comprises at least one ultrasonic emitter (6) configured to generate a mechanical vibratory motion in a range of ultrasonic frequencies, said emitter (6) being fixed against the circumferential wall (10) so as to transmit the mechanical vibratory motion to the vibrating circumferential wall (10) and to reduce its coefficient of friction.

Abstract: The invention relates to a cutting wheel of a tunnel boring machine comprising at least one material discharge opening (5), said discharge opening (5) being delimited by a circumferential wall (10), the cutting wheel (3) being characterized in that it further comprises at least one ultrasonic emitter (6) configured to generate a mechanical vibratory motion in a range of ultrasonic frequencies, said emitter (6) being fixed against the circumferential wall (10) so as to transmit the mechanical vibratory motion to the vibrating circumferential wall (10) and to reduce its coefficient of friction.

Abstract: An electronic device for controlling applications using at least one piezoelectric, electrostrictive, or magnetostrictive transducer. The device includes an electric power generator, electronic control means capable of automatically controlling the electric power generator by using a control macro-function, and an electronic memory. Stored in the memory are the following: a first family of control functions including one or more different elementary control functions, each elementary control function of the first family making it possible to adjust the amplitude of the control signal; a second family of control functions including one or more different elementary control functions, each elementary control function of the second family making it possible to adjust the duration of the control signal; and a third family of control functions including several different elementary control functions, each elementary control function of the third family making it possible to adjust the cycle of the control signal.

Abstract: The electronic device (1) for controlling comprises an electric power generator (10) suitable for supplying at least one piezoelectric, electrostrictive or magnetostrictive transducer (2), with a control signal (S), electronic controlling means (11) capable of automatically controlling the electric power generator by using a control macro-function (M), and an electronic memory (112) in which the following are stored: a first family (A) of control functions comprising one or a plurality of different elementary control functions (An), making it possible to adjust the amplitude of the control signal (S), a second family (T) of control functions comprising one or a plurality of different elementary control functions (Tn), making it possible to adjust the duration of the control signal (S), a third family (C) of control functions comprising a plurality of different elementary control functions (Cn), making it possible to adjust the control signal (S) cycle, at least said control macro-function (M), which is made u

Abstract: A device for spraying a cosmetic composition may include a sonotrode, the sonotrode having an end collar defining an ejection surface for ejecting particles of composition, the collar being suitable for bending under the effect of vibration of the sonotrode.

Abstract: A spray head for spraying a cosmetic or dermatological composition, in particular for application to the human body, may include a sonotrode for transmitting ultrasound vibration from a transducer to an ejection surface for ejecting particles of composition, the sonotrode including a channel for feeding the composition to the ejection surface. The channel may present a narrow portion between a composition inlet into the sonotrode and the composition outlet to the ejection surface.

Abstract: The present invention relates to a cosmetic assembly comprising a cosmetic or dermatological composition contained in a reservoir, the said composition being liquid and comprising, in a physiologically acceptable medium, at least one pulverulent phase, and the said composition having a viscosity ranging from 5 to 500 mPa·s, and to a device for spraying the said composition, comprising a sonotrode (82) that is fed with composition via a hollow channel for feeding with product to be sprayed.

Abstract: The present invention relates to a cosmetic assembly comprising a cosmetic or dermatological composition contained in a reservoir, the said composition being liquid and comprising, in a physiologically acceptable medium, at least 10% by weight of water and at least one water-soluble coloring agent; and a device for spraying a cosmetic composition, comprising a container containing the said liquid cosmetic composition, equipped with a piezoelectric spraying mechanism for spraying the cosmetic composition in the form of droplets.

Abstract: A spray head for spraying a cosmetic or dermatological composition, in particular for application to the human body, may include a sonotrode for transmitting ultrasound vibration from a transducer to an ejection surface for ejecting particles of composition, the sonotrode including a channel for feeding the composition to the ejection surface. The channel may present a narrow portion between a composition inlet into the sonotrode and the composition outlet to the ejection surface.

Abstract: A device for spraying a cosmetic composition may include a sonotrode, the sonotrode having an end collar defining an ejection surface for ejecting particles of composition, the collar being suitable for bending under the effect of vibration of the sonotrode.

Abstract: The transducer comprises for example a block (1) of sensitive elements such as piled piezoelectric disks held up by a stud bolt between two ferrules and a shell (8) all in one piece, that is arranged around the piling with a concave central part (8A) extended on either side by a solid cylindrical part (8 B, 8 C). Two sleeves are arranged at the two opposite ends of the transducer and elastic elements (14) for decoupling them in relation to the vibrating block (1) are interposed. A flexible housing (18) can be placed around the shell (8) so as to insulate from the outside environment the inner volume of the transducer that can be filled with a fluid such as oil. Connecting means allow the vibrating block to be connected to an exciting voltage source. The transducer can be used for the emission of vibrations at sea or in wells and notably petroleum or gas wells for example.