| 摘要 |
A push-cart mounted tank body contains an annular compressed air tank encircling a coaxial brake fluid supply tank that is never under pressure in operation, superimposed on a hemispherical pressure chamber which on its flat bottom side is terminated by a flexible membrane. A float valve is provided which seals off the pressure chamber from the fluid container when it rises to its topmost position. A multipath selector valve on top of the device, in one position, provides for flushing out the brake fluid in the brake system of a vehicle being serviced with compressed air from the annular tank, in another position it provides for admitting compressed air below the flexible membrane of the pressure chamber to propel fresh liquid therefrom into the vehicle brake system, during which operation the float valve closes and the fluid in the pressure chamber, which is just enough to fill a brake system, is delivered under pressure to the vehicle system; in another position testing the tightness of the vehicle system by isolating the latter while observing the pressure therein on a manometer on the mobile equipment, and in still another position, decompressing system and the mobile equipment. Contact of compressed air with brake fluid is thereby minimized so as to avoid harmful absorption of atmospheric moisture. |
