Here's the Wiki entry. IIRC, the pic was in
Flying magazine at the time. Don't know how to find, but if might be in the attic.
Hoover Nozzle and Hoover RingEdit
A perhaps-undesired recognition is the "Hoover Nozzle" used on jet-fuel pumps. The Hoover Nozzle is designed with a flattened bell shape. The Hoover Nozzle cannot be inserted in the filler neck of a plane with the "Hoover Ring" installed, thus preventing the tank from accidentally being filled with jet fuel.
This system was given this name following an accident in which Hoover was seriously injured, when both engines on his Shrike Commander failed during takeoff. Investigators found that the plane had just been fueled by line personnel who mistook the piston-engine Shrike for a similar turboprop model, filling the tanks with jet fuel instead of avgas (aviation gasoline).[27] There was enough avgas in the fuel system to taxi to the runway and take off, but then the jet fuel was drawn into the engines, causing them to stop.
Once Hoover recovered, he widely promoted[28] the use of the new type of nozzle with the support and funding of the National Air Transportation Association, General Aviation Manufacturers Association and various other aviation groups (the nozzle is now required by Federal regulation on jet fuel pumps).[29][30]