| 摘要 |
<p>There is provided a system for installation in mechanized vehicles which have an hydraulic brake system and preventing the unauthorized operation of such vehicles including a valve of a special construction which comprises a housing (20) which is provided with inlet ports (13', 14') outlet ports (15', 16') for the hydraulic fluid and an inner core member (21) which is movable within the housing (20) and is provided with bores (27) which correspond with bores in said housing forming a passage, said valve further comprises at least one by pass passage (28, 29) provided with a one way valve (30), the inner core (21) is movable rotatively or axially within the said housing (29), and being connected to a key operated lock (22). The inner member (21) may also comprise an extension provided with two bores (24, 25) perpendicular to each other, in order to lock the hydraulic steering system of the vehicle. In another embodiment of the invention, the two parts of the inner member are distinct from one another and operated by two different keys.</p> |
