Abstract: The present invention refers to a microfluidic system based on passive capillary valves and pumps, that allows a discontinuous and autonomous measurement process for extensive periods of time. The microfluidic system comprises: at least one measuring chamber, at least one inlet for the input of a biofluid, a microfluidic intake channel fluidly communicating the inlet with the measuring chamber, at least one sensor suitable for measuring a parameter of an analyte of a biofluid. A passive fluid pump is fluidly communicated with the measuring chamber, and it is adapted to generate a capillary pressure greater than the biofluid generation pressure. A retention valve is interposed between the measuring chamber and the fluid pump, and the retention passive valve is configured to stop flow of biofluid for a certain period of time, when the measuring chamber if filled with biofluid.

Abstract: METHOD AND DEVICE FOR PREVENTING EXCESSIVE WEAR IN GEARS, involving lubricating the contact point between the wheels (1) of a gear (2), injecting lubricant into said point via parts (3) housed in the notches (4) that determine the spaces between teeth (5), via a system of channels with a lateral opening provided in said parts (3). The width (a) and thickness (b) of the parts (3) coincide respectively with the width of the bottom of the valley of the notch (4) and with the space between the surface of the crest (7) of the engaging tooth (5) and that of the valley of the notch (4) which houses it. The parts (3) have through-holes (8) connected to longitudinal channels (9) that, at one of the ends thereof, meet in a laterally open notch (10). The same system that lubricates the rest of the gear assembly is used to inject the lubricant.