| 摘要 |
<p>TITLE UNLOADING VALVE FOR OVER-TURNED TANK INVENTOR Evan Philip MARCH The invention achieves a spring loaded, manually operated, flow and relief valve to be associated with each chamber of a tanker or tank. Preferably, the flow valve can be conviently and permanently mounted as a discharge orifice in the captive cover, or manhole cover, of such tanker, and conveniently located particularly in the annular margin between the radial. flange and a centrally located hingible disc closure of the manhole cover. Specifically, thevalve mechanism comprises a valve body carrying a valve controller; and defining a first larger orifice; a gate, mounted for movement relative to the valve body and positioned to sealingly close and to open the forst larger orifice; and, means urging the gate into sealing, closing relation With the larger orifice, but responsive to the valve controller for positioning the gate open.</p> |
