Abstract: The invention relates to a positive displacement pump (10) comprising a pump body (11, 101, 201) comprising an inlet end (16, 116, 216) and an outlet end (18, 118, 218), a pumping chamber (30, 130, 230) arranged between said inlet end (16, 116, 216) and said outlet end (18, 118, 218), at least one membrane (20, 120, 220) active in the pumping chamber (30, 130, 230) and mobile between an expanded configuration in which the volume of the pumping chamber (30, 130, 230) is maximum and a retracted configuration in which the volume of the pumping chamber (30, 130, 230) is minimum, a delivery valve (46, 146, 246) arranged close to the outlet end (18, 118, 218) of the pump body (11, 101, 201), an intake valve (26, 126, 226) comprising an intake mouth (27, 127, 227), an outlet mouth (28, 128, 228) and a valve wall (29, 129, 229) that joins the intake mouth (27, 127, 227) to the outlet mouth (28, 128, 228), the intake mouth (27, 127, 227) being coupled to the inlet end (16, 116, 216) of the pump body (11, 101, 201) and

Abstract: The invention relates to a positive displacement pump (10) comprising a pump body (11, 101, 201) comprising an inlet end (16, 116, 216) and an outlet end (18, 118, 218), a pumping chamber (30, 130, 230) arranged between said inlet end (16, 116, 216) and said outlet end (18, 118, 218), at least one membrane (20, 120, 220) active in the pumping chamber (30, 130, 230) and mobile between an expanded configuration in which the volume of the pumping chamber (30, 130, 230) is maximum and a retracted configuration in which the volume of the pumping chamber (30, 130, 230) is minimum, a delivery valve (46, 146, 246) arranged close to the outlet end (18, 118, 218) of the pump body (11, 101, 201), an intake valve (26, 126, 226) comprising an intake mouth (27, 127, 227), an outlet mouth (28, 128, 228) and a valve wall (29, 129, 229) that joins the intake mouth (27, 127, 227) to the outlet mouth (28, 128, 228), the intake mouth (27, 127, 227) being coupled to the inlet end (16, 116, 216) of the pump body (11, 101, 201) and

Abstract: This hydraulic valve (1) comprises a valve body (2), an inlet mouth (3) of flow into the valve body (2), provided with a substantially non-deformable two-dimensional section, and a selective passage port (4) of flow in the valve body (2) having a linear section widenable under the flow pressure. The valve body (2) is formed with two sheets (21, 22) made of deformable material, adjacent to each other at the selective passage port (4), sealed together at their respective external edges (23, 24) extended from the inlet mouth (3) to the selective passage port (4) and sealed together around the inlet mouth (3). The structure with the two adjacent sheets (21, 22) guarantees an ideal closure of the selective passage port (4) when the delivery pressure is lower than a preset value, in that the selective passage port is formed with an intrinsically linear shape.

Abstract: A filter for the separation of solids and liquids from muds, and specifically those from industrial processing, includes a container and a filtering bag housed in the container for reception of the muds. The filter further includes a deformable membrane housed in the container and defining therein a closed volume of variable size. A fluid pump is provided, communicating with the volume, to vary the size of the volume by pumping fluid into the volume, thereby squeezing the filtering bag in the container.

Abstract: A filtering case (1,30) is comprised of two superimposed parts, respectively an upper one (2,31) and a lower one (43, 32), which slide telescopically the one within the other. The upper part (2,31) bounds a slurry receiver chamber (2a,51) and has an apertured (4,51) bottom wall (8,40a); the lower part (3,32) is guided through the aperture (4,61) between a first position outside the slurry receiver chamber (2a,51) and a second position at least partway inserted thereinto. The lower part (3,32) has fiter-forming side walls whereby the overall filtering area of the case (1,30) increases with the depth of penetration of the lower part (3,32) into the slurry receiver chamber (2a, 51).

Abstract: A filtering case (1,30) is comprised of two superimposed parts, respectively an upper one (2,31) and a lower one (43,32), which slide telescopically the one within the other. The upper part (2,31) bounds a slurry receiver chamber (2a,51) and has a an apertured (4,61) bottom wall (8,40a); the lower part (3,32) is guided through the aperture (4,61) between a first position outside the slurry receiver chamber (2a,51) and a second position at least partway inserted thereinto. The lower part (3,32) has filter-forming side walls whereby the overall filtering area of the case (1,30) increases with the depth of penetration of the lower part (3,32) into the slurry receiver chamber (2a, 51).