FLUID-DYNAMIC TRANSDUCER DEVICE FOR EXPLOITING THE KINETIC ENERGY OF LAND VEHICLES

摘要

The device (1) comprises : a stationary support structure (2; 3, 4) which is mounted underneath a road surface (P) travelled along by vehicles and in which a compression chamber with a variable cross-section (8) is defined between an inlet duct (9) and an outlet duct (11) for a fluid, a pumping element (16) being movably mounted inside said chamber; and a tread plate (20) movable with respect to the structure (2; 3,4) and coupled with the pumping element (16) ; the tread plate (20) being able to be surmounted and moved by a wheel (W) of a passing motor vehicle and to cause a displacement of the pumping element (20) and a corresponding compression of the fluid contained inside said chamber (8) . The support structure (2; 3, 4) has, defined inside it, a passage (14) separated from the compression chamber (8) , in a fluid- tight manner, by means of a resiliently deformable membrane (16) acting as a movable pumping element. A spherical piston (18) is mounted in this passage (14) , arranged between the membrane (16) and the tread plate (20) . The compression chamber (8) has a frustoconical surface against which, under the thrust of the spherical piston (18) , the membrane (16) bears at the end of a compression stroke.