Vehicles for travelling over land and/or water having fluid curtains formed by injector action

Claim 1

IN A VEHICLE OF THE TYPE DESCRIBED ADAPTED TO HOVER OR TRAVEL OVER A SURFACE AT A PREDETERMINED HEIGHT WHICH IS SMALL IN RELATION TO THE SIZE OF SAID VEHICLE AND WHEREIN A FLUID IS CAUSED TO ISSUE FROM THE LOWER PART OF THE VEHICLE BODY AND FORM A CURTAIN OF MOVING FLUID TRAVELLING ACROSS THE GAP EXISTING BETWEEN SAID BODY AND SAID SURFACE, WHICH CURTAIN IN COMBINATION WITH SAID BODY AND SAID SURFACE EFFECTIVELY ENCLOSES A GAS CONTAINING SPACE BETWEEN THE BOTTOM OF SAID VEHICLE AND SAID SURFACE WHEREIN A CUSHION OF GAS UNDER PRESSURE IS FORMED, THE IMPROVEMENT WHICH CONSISTS IN THE PROVISION OF MEANS COOPERATING WITH THE PERIPHERY OF THE LOWER PART OF THE VEHICLE BODY TO FORM AN ANNULAR DUCT HAVING A DISCHARGE MOUTH AT THE BOTTOM END THEREOF ADJACENT THE BOTTOM OF THE VEHICLE AND AN UPPER PORTION WHICH IS OPEN TO THE ATMOSPHERE, A SOURCE OF HIGH PRESSURE FLUID CARRIED BY THE VEHICLE, AND MEANS FOR INJECTING FLUID FROM SAID SOURCE INTO SAID DUCT, SAID INJECTING MEANS INCLUDING JET NOZZLE MEANS POSITIONED AROUND THE PERIPHERY OF THE VEHICLE AND OPENING INTO SAID DUCT, AND MEANS FOR SUPPLYING INJECTOR FLUID FROM SAID SOURCE TO SAID JET NOZZLE MEANS, WHEREBY AIR MAY BE ENTRAINED FROM THE ATMOSPHERE INTO SAID DUCT AND MIXED THEREIN WITH SAID INJECTED FLUID TO FORM A CURTAIN CONSISTING PRIMARILY OF ENTRAINED AIR ENERGISED BY INJECTOR ACTION.