Abstract: A method for determining a characteristic quantity representative of grip conditions of a vehicle wheel running on a ground surface involves imposing a given simultaneous steering angle variation on two wheels mounted on the same axle of the vehicle, the steering angle variation being of the same amplitude for the two wheels but in opposite directions, and measuring the characteristic quantity for at least one of the two wheels.

Abstract: To determine a characteristic quantity representative of grip conditions of a wheel of a vehicle running on a given ground surface, the following steps are performed: for two wheels mounted on the same axle of the vehicle, imposing a given simultaneous steering angle variation, the steering angle variation being of the same amplitude for the two wheels but in opposite directions; and measuring the characteristic quantity for at least one of the two wheels.

Abstract: A profile recording device comprises a network of photosensitive image points. It is adapted to a reading in parallel of all the lines of image points and integrates means for processing (threshold comparators and memorization cells) the electric signals delivered in order to extract the observed profile therefrom.

Abstract: The present invention is intended to reduce thermosiphon effects within the annular space (6) situated between the pump casing (1) and the vertical wall (9) of an opening situated within the slab (3) covering the vessel for a nuclear reactor immersed in liquid sodium (4), with an inert gas (15) filling the space situated between the surface of the sodium and the bottom portion of said slab (3).The device to which the present invention pertains consists of a floating ring (7) placed around the pump casing (1) and a disc (8) which is integral with the vertical wall (9) of the opening situated within the slab (3). The shape of the aforementioned ring (7) and the shape of the aforementioned disc (8) are complementary with one another.Nuclear plants application.