Rotary motor

In a rotary motor, the rotor of which is propelled by a jet of high-pressure fluid propellant, the combination which comprises

• an annular rotor consisting of a ring having a diameter much greater than its thickness and its width, and a roughened right cylindrical outer surface;
• a housing having a smooth right cylindrical inner surface apposed to said roughened right cylindrical outer surface and concentric therewith, whereby the spacing between the apposed surfaces is uniform in all directions;
• bearing means for rotatably supporting said rotor consisting of apposed annular races separated by rolling means and united in freely rotating, inseparable relation one to the other and to said rolling means, said bearing means having an inside diameter at least equal to the inside diameter of said annular rotor and having one race affixed to said housing and the other race affixed to said rotor;
• and
• jet orifices arranged to direct a plurality of jets of high-pressure fluid propellant into the space between the apposed surfaces of said rotor and said housing at spaced intervals about the periphery thereof and so oriented that a portion only of the jet impinges on said roughened surface at an acute angle and the balance is introduced tangentially to the right cylindrical surface of the inner housing and does not impinge on the roughened surface of the rotor, said housing and said rotor having apposed spaced-apart surfaces forming peripheral passageways at each side of the rotor communicating with the space between said first-named apposed surfaces and the ambient atmosphere, whereby said jets fan out to each side of the jet from the point of introduction of the jets toward said peripheral passageways.