| 摘要 |
<p>A power-operated valve has a drive element (3) located in a housing (1) into which extends an actuating shaft (11) of the valve which controls the flow of fluid inside the housing (25). The drive element (3) is connected to a toothed spindle (4) which meshes with a horizontally disposed toothed wheel (5) fixed to a cylindrical body (6) from the base of which extends concentrically an extension (7) of smaller diameter. The extension (7) has an irregular dentation (8) which is complementary to another dentation (9) provided in another element (10) to which the shaft (11) of the valve is axially connected, the irregular complementary dentations (8, 9) constituting a cam to produce linear displacements of the shaft (11) of the valve. The drive mechanism of the valve, includes a manually-operated rotary lever device (29) having teeth meshing with teeth on the element (10). <IMAGE></p> |
